Example 2: Finding the First and Last Words in a String. The following example scans a string for the first and last words. Note the following: A negative count instructs the CALL SCAN routine to scan from right to left. Leading and trailing delimiters are ignored because the M modifier is not used.SAS matches the first value in the list with the first variable in the list of elements, the second value with the second variable, and so on. Element values are enclosed in quotation marks. To specify one or more initial values directly, use the following format: ... SAS uses the last value.) You can also use RETAIN to assign an initial value ...You can make use of the first. variable in the following way using enumeration within groups. As you would like to retain the 2 most recent records for each name, proceed by sorting them as follows: BY name DESCENDING date; SET mydata; count + 1; BY name DESCENDING date; IF FIRST.name THEN count=1; IF count<=2 THEN OUTPUT;Mar 29, 2013 · On the one hand it sounds like you want to GENERATE data based on some macro variable. If that is the case write a date step. You should be able to write the data step using data step DO looping and just set the bounds of the loops using the macro variables. data want; do c= 1 to &num_clusters; You can use the FIND function in SAS to find the position of the first occurrence of some substring within a string.. Here are the two most common ways to use this function: Method 1: Find Position of First Occurrence of String. data new_data; set original_data; first_occurrence = find (variable_name, "string "); run; . Method 2: Find Position of First Occurrence of String (Ignoring Case)a) 534, i.e. the middle numbers Something like: Give me all numbers and then cut the first and last (that would work in my case). b) 1CDF536 Just removing the last two characters. Especially the first one is important and would be great if it works somehow. Best. SCAN & SUBSTR both work perfectly for me.Please help me with the following SAS problem. I need to transform my data set from "original" to "new" as shown in the picture. Because the "priority" variable can not be sorted, it seems that first. and last. variables would not work here, no? The goal is to have each sequence of priorities represent one entry in the "new" dataset. Thank you ...Solved: Hi I have a requirement to check : first date of the current month & last month's first date +1 So today's date is : 2/12/2018 I want the. Community. Home; Welcome. Getting Started; Community Memo; All Things Community; SAS Customer Recognition Awards (2023) ... Join us for SAS Innovate April 16-19 at the Aria in Las Vegas.Example 2: Finding the First and Last Words in a String. The following example scans a string for the first and last words. Note the following: A negative count instructs the CALL SCAN routine to scan from right to left. Leading and trailing delimiters are ignored because the M modifier is not used.Jan 17, 2023 · You can use the FIRST. and LAST. functions in SAS to identify the first and last observations by group in a SAS dataset. Here is what each function does in a nutshell: FIRST.variable_name assigns a value of 1 to the first observation in a group and a value of 0 to every other observation in the group. LAST.variable_name assigns a value of 1 to ... The First. and Last. variables have values of 0 when SAS is processing an observation with the first occurrence of a new value for those variables, and a value ...The value of these variables is either 0 or 1. SAS sets the value of FIRST. variable to 1 when it reads the first observation in a BY group, and sets the value of LAST. variable to 1 when it reads the last observation in a BY group. These temporary variables are available for DATA step programming but are not added to the output data set.Hi all! I have a data set with a bunch of IDs as string variable like eg.below. I want to delete all the characters from "(" and include only the numbers before "(" for each ID. Any help with SAS code is much appreciated. Thanks! ID 48 (500_82) 49 (501_82) Want: ID_New 48 49E.g., if I was wrong and you only want the first and last records, then the following might suffice: data want; set have end=last; if _n_ eq 1 or last then output; run; Conversely, if you actually do need the minimum and maximum dates in the file, then you could use something like: data want (drop=_:); set have end=last;Oct 31, 2019 · Re: COUNTER, RETAIN AND FIRST. The very first thing you will need to explain is the sort order. Since to use FIRST. there must be a BY statement, then please at least share the BY statement you are using. Solved: Hello, I'm a 2 month old SAS user and just started practicing COUNTER, RETAIN, FIRST. ,Last. and DO/END. FIRST and LAST processing ...Jul 15, 2020 · In the above example what I am lloking for is writing code to basically say: If your first observation for the customer is "C" and your last is also "C" then indicator = "PASS". but if your first observation of the flag is "C" and your last observation is "O" then your indicator = "FAIL". So the result should look like this. In our example, the FIRST.race variable is 1 when SAS processes row 1, 3, and 6 because these are the first row of each “race-group”. Because the number 1 has the same meaning as TRUE, we can use FIRST.race in an IF Statement to filter the first row per group. data work.first_by_group; set work.my_ds_srt; by race;You correctly state there are no automatic variables in SAS SQL equivalent to first. or last. The data will need to have columns that support a definitive within group ordering that can be utilized for MAX selection and then applied as join criteria. Projects in your data is a possible candidate: data have;FIRST関数は、CHAR(string, 1)およびSUBPAD(string, 1, 1)と同じ結果を返します。結果は同じでも、対象変数のデフォルトの長さは異なります。 結果は同じでも、対象変数のデフォルトの長さは異なります。FIND v/s FINDC v/s FINDW in SAS. INDEX - It searches a substring in a character string and returns the position of its first occurrence from the character string.; INDEXC - It searches individual characters from a specified substring and returns the first occurrence of any character from a given substring.; INDEXW - It searches for the exact character, word, or string mentioned in the ...Aug 5, 2020 ... 文章浏览阅读1.7w次，点赞8次，收藏52次。在SAS的DATA步中，可以使用by分组，在处理过程中会产生两个临时变量FIRST.variable和LAST.variable， ...SAS has the FIRST. and LAST. automatic variables, which identify the first and last record amongst a group with the same value with a particular variable; so in the following …Using a BY statement allows us to determine the first and last observation in the "by-group," i.e., all the records with the same value in the variable specified in the BY statement (and often called the "by-variable"). When you use a BY statement in the DATA step, SAS creates two temporary variables that may be used only in that DATA step.Corrected version. Data out; set in; by social_security_number year; if first.year then output; run; Explanation. You can have numerous by variables, and for each one first and last automatic variables are generated. In this case first.social_security_number would return only one record per social_security_number.Anyways, a quick and dirty approach would be: sort the data first by bankname and then by descending brname and use the same code as you are using currently. proc sort data = temp; by bankname descending brname ; run; and your first. and last. calculation. Regards, Somi.Hear from SAS execs, best-selling author Adam Grant, Hot Ones host Sean Evans, top tech journalist Kara Swisher, AI expert Cassie Kozyrkov, and the mind-blowing dance crew iLuminate! Plus, get access to over 20 breakout sessions.This is usually how I did when I want to move a column to be the first column in the dataset: data a2; retain idx; set a1; idx = _n_; run; Is there. ... Watch our general sessions LIVE or on-demand starting April 17th. Hear from SAS execs, best-selling author Adam Grant, Hot Ones host Sean Evans, top tech journalist Kara Swisher, AI expert ...For instance: 1) Customer Name Customer ID Address Customer Type. Joe Doe 123 123 Way Online (retain) Joe Doe 123 123 Way In-Store (delete) Ken Moore 456 456 Way Online (retain) Ken Moore 456 456 Way In-Store (delete) Lisa Mae 789 789 Way In-Store (retain) I want to keep the "Online" record (if duplicates) and delete the "In-Store" records ...How FIRST. and LAST. Variables Works. When an observation is the first in a BY group, SAS sets the value of FIRST. variable to 1 for the variable whose value changed, as well as for all of the variables that follow in the BY statement. For all other observations in the BY group, the value of FIRST. variable is 0.1. So your basic problem is you are using macro logic where you should be using normal logic. %if first.&rank_column. = 1 %then %do; Will never be true, even if rank_column is empty because the string first. can never equal the string 1. But if you code it using SAS code instead of macro code.The variable, which is initialized to 0, is set to 1 when the MERGE statement processes the last observation. If the input data sets have different numbers of observations, the END= variable is set to 1 when MERGE processes the last observation from all data sets. Tip: The END= variable is not added to any SAS data set that is being created.Then when the code executes, SAS creates temporary numeric variables first.var1, last.var1; first.var2, last.var2. These variables have 0/1 values for false/true, and indicate if the current row is the first or last row being input into a DATA or PROC step from the BY-group defined by the specified variable. The relevant 9.4 documentation is at:The SQL language as originally defined in the 1980's and codified into 1992 standard that PROC SQL supports has no concept of first and last. Other implementations of SQL added extra non-standard features to get around this and ultimately the SQL standard was expanded to at least include windowing functions that allow something like processing ...Pandanggo sa Ilaw, which translates as Dance of Lights, is a waltz-style, playful folk dance that showcases a unique fusion of local and western indigenous dance forms. Originating...Jan 10, 2018 · You correctly state there are no automatic variables in SAS SQL equivalent to first. or last. The data will need to have columns that support a definitive within group ordering that can be utilized for MAX selection and then applied as join criteria. Projects in your data is a possible candidate: data have; Re: first.* is unitialized. In order to use first. syntax, you must use a BY statement in your data step: BY code; The =1 is unnecessary, it is implied TRUE. And I don't believe you can use FIRST. together with WHERE (since WHERE does not aware of what is going on in the data step, IF is). /Linus.I have a dataset that has variables ID, Date, and Value. For each ID that has more than one Value, I want to output the earliest observation into a new column 'First', and the latest observation into a new column 'Last'. For IDs that only have one Value, I want the observation to be ignored. The final aim is to do a scatter plot of 'First' vs ...TITLEn will replace the Nth title line and remove any titles after that. So either of these statements should clear the titles. TITLE1; TITLE; Note that TITLE statements issued in the middle of a step will take effect when that step produces output. So make sure to terminate your PROC steps with the appropriate statement for that PROC (RUN or ...If you use a by statement along with a set statement in a data step then SAS creates two automatic variables, FIRST.variable and LAST.variable, where variable is the name of the by variable. FIRST.variable has a value 1 for the first observation in the by group and 0 for all other observations in the by group.今回はFirst,Lastステートメントの説明です。 SASの処理上では1行ごとにプログラムが実行されますが、 複数（グループ）レコードがある時、最初,最後のレコードの情報が知りたい。または前の値を残した上で計算したい。という場合に使用されるステートメントです。 これはものすごく使います ...If the conditions that are specified in the IF clause are met, the IF-THEN statement executes a SAS statement for observations that are read from a SAS data set, for records in an external file, or for computed values. ... Using IF-THEN statements with the ELSE statement causes SAS to execute IF-THEN statements until it encounters the first ...Refer to the SAS documentation for your operating environment for information about other sorting capabilities. Sorting SAS Data Sets: In the following example, the original data set was in alphabetical order by last name. PROC SORT replaces the original data set with a data set that is sorted by employee identification number.We can use the following FIRST. function in SAS to assign a value of 1to the first observation for each team in the dataset: Notice that the … See moreWhile you may have obscure problems with names like Vincent Van Gogh, your basic idea for first and last name are correct. You can check whether there are 3 names, and only assign the middle name if there is one. The DATA step syntax is easy: if countw (fullname) > 2 then second = scan (fullname, 2, ' '); The SQL syntax is harder, and just a ...Join us for SAS Innovate April 16-19 at the Aria in Las Vegas. Bring the team and save big with our group pricing for a limited time only. Pre-conference courses and tutorials are filling up fast and are always a sellout.In this process, we first calculate the logarithm base 10 of the number 1021, which gives us a result of 3.009. Then, by using the INT function, we extract the integer part of the logarithm, resulting in 3. Finally, by adding 1 to the integer part, we determine that the number 1021 has 4 digits. Top 100 SAS Tutorials.Re: first.id and last.id. Whenever you are using the BY statement the source data need to be sorted in the same way as specified in the BY statement. Exception: when the data is stored in SPDE, SPDS or an external RDBMS the sorcerer engine sorts the data on the fly based on your BY statement.About. SAS System Concepts. Windowing Environment Concepts. DATA Step Concepts. SAS Files Concepts. Industry Protocols Used in SAS. Appendix.How it works. FIRST.variable = 1 when an observation is the first observation in each group values of variable ID. FIRST.variable = 0 when an observation is not the first observation in each group values of variable ID. LAST.variable = 1 when an observation is the last observation in each group values of variable ID.Re: Changing the Column positions in SAS. the easiest way to change the column order, is to create it in the correct order first, then you won't have to change the order afterwards. Advice you have received on setting column order, should be applied when you create the dataset/table.Summary. In summary, the BY statement in the DATA step automatically creates two indicator variables. You can use the variables to determine the first and last record in each BY group. Typically the FIRST.variable indicator is used to initialize summary statistics and to remember the initial values of measurement.You can possibly "put back" observations removed, by joining the original table (have) with processed one (want) into want1 . proc sql; create table want1 as select a.*, b.baseline_flag from have a left join want b on a.Id = b.id and a.vsdate = b.vsdate and a.trtdate = b.trtdate; quit;The technique you are using is better for test if a string is a number, so strings like 1e4 would be read correctly. If your numbers could include commas or dollar sign use COMMA informat. If you are trying to see if string is a SAS name NVALID function. [pre] data _null_; input string $16.; x = anydigit (string);Oct 7, 2017 · First and Last Variables. Using this code, I have understood that automatic variables FIRST.SubjID and LAST.SubjID are supposed to appear in the PDV. I am supposed to fill out the variables for FIRST.SubjID and LAST.SubjID, but am confused as to how to actually display these variables. data WORK.AEs; infile datalines; input SubjID. Jul 7, 2022 · As Paige said, the best tool is data step,NOT sql. Anyway, there is some sql code could get first last. But I don't like it. proc sort data=sashelp.class out=have;by sex;run; ods select none; ods output sql_results=sql_results; proc sql number; select * from have; quit; ods select all; proc sql; create table want as select * from sql_results group by sex having row=min(row) or row=max(row); quit; 4. Using Joe's example of a macro variable to specify the number of observations you want, here is another answer: do _i_=nobs-(&obswant-1) to nobs; set have point=_i_ nobs=nobs; output; end; stop; /* Needed to stop data step */. This should perform better since it only reads the specific observations you want.Sometimes SQL variants have different methods of implementing this type of functionality. For doing this code conversion, indenting your code also makes it much easier to read. data hsshow(/*drop=days_span*/); set show_all; by member_i prognum mon; if first.mon then days_elig=0; days_elig + days_span; if days_elig gt days_in_mon then days_elig ... For the last observation in a data set, the value of all LAST. variable variables are set to 1. The values of both FIRST. and LAST. variables in SAS are either 1 or 0. FIRST. variable = 1, when an observation is the first observation in a BY group. FIRST. variable = 0, when an observation is not the first observation in a BY group. proc sort data=a out=b ; by id time ; run; data c; set b; IF FIRST.id; BY id time; run; - user601828. Oct 7, 2015 at 17:28. It is bad style to have the IF statement between the SET and BY statements, but it probably will not impact the data step. If you are seeing changes in the number of distinct ID values then it should be caused by changes ...Jan 29, 2015 · The Right Way to Obtain Duplicates in SAS. To obtain ALL duplicates of a data set, you can take advantage of first.variable and last.variable . Here is the code to do it with the above example data set of test; you will get both the single observations and the duplicate observations. For posterity, here is how you could do it with only a data step: In order to use first. and last., you need to use a by clause, which requires sorting: proc sort data=BU; by ID DESCENDING count; run; When using a SET statement BY ID, first.ID will be equal to 1 (TRUE) on the first instance of a given ID, 0 (FALSE) for all other records.Note that in some cases, I just need the unique instances of the variable (such as with On_Off) but in other cases I need every instance (such as with Group). I have been trying first./last. processing with by statements, but I can only get that to work with one variable at a time. Is there a way to do this for N variables within the same data ...This may get close to the duration depending on responses to those questions. data want ; set jobhist ; by id jobnum farm_ever ; retain start ; if first.id then start= -999; if farm_ever=1 and start=-999 then start=startyear; else if farm_ever=0 then start=-999; if last.id and start ne -999 then duration = endyear-start; run ;When it comes to finding comfortable and stylish shoes, SAS shoes are a go-to brand for many shoppers. Known for their exceptional quality and attention to detail, SAS shoes offer ...The %SUBSTR and %QSUBSTR functions produce a substring of argument, beginning at position, for length number of characters. %SUBSTR does not mask special characters or mnemonic operators in its result, even when the argument was previously masked by a macro quoting function. %QSUBSTR masks the following special characters and mnemonic operators ...Re: first.* is unitialized. In order to use first. syntax, you must use a BY statement in your data step: BY code; The =1 is unnecessary, it is implied TRUE. And I don't believe you can use FIRST. together with WHERE (since WHERE does not aware of what is going on in the data step, IF is). /Linus.First, let’s keep things simple and do the imputation for just one county. The intent of the following DATA step is to impute the missing price of 2005 for the last county. DATA EXAMPLE3_WRONG; SET EXAMPLE3 (WHERE=(COUNTY=1003)); IF PRICE NE . THEN PRICE_IMPUTE = PRICE; ELSE PRICE_IMPUTE = LAG(PRICE)*1.1; RUN;data have; input ID admission_date :date9.; format admission_date date9.; cards; 1 03Feb2009 1 05Feb2009 1 14Jun2009 2 25Oct2011 3 19Sep2008 3 04Jan2010 ; proc sql; create table want as select a.*,intck('days',m,admission_date)>90 as indicator from have a left join (select id,min(admission_date) as m from have group by id)b on a.id=b.id order by id,admission_date; quit;195. 11K views 2 years ago SAS Beginner to Pro | SAS Tutorial for Beginners. This video provides a comprehensive explanation of First.Variable and Last.Variable including the PDV...4. Using Joe's example of a macro variable to specify the number of observations you want, here is another answer: do _i_=nobs-(&obswant-1) to nobs; set have point=_i_ nobs=nobs; output; end; stop; /* Needed to stop data step */. This should perform better since it only reads the specific observations you want.The by statement that we used above not only caused SAS to process the data in the groups defined by the variable (famid) given on the by statement, it also caused SAS to create two temporary variables: first.famid and last.famid. Temporary variables are variables that you can use during a data step but do not appear in the new data set.FIRST-dot and LAST-dot processing is a topic that deserves its own tutorial, but you can learn more from this article by @Rick_SAS. Tip: FIRST-dot/LAST-dot processing is a great use case for the DATA step debugger (in SAS Enterprise Guide or SAS Studio with SAS Viya). You can see exactly how it works with your DATA step logic.As I understand what you want, you simply want the first and last records for a given ID on any date. If so, then you only need: data get_first_and_last; set master_table; by ID Date; if first.date or last.Date then output; run; Of course, if you only want the last record on a date then replace the if with:Feb 10, 2018 · Hi all! I am having trouble using array, first., and last. to create only one observation and multiple variables per subject. The data set has 18,082 observations with 3 variables: ID_NO, SYMPTOM_NO, and SYMPTOM. I need to keep the id_no variable and lose the symptom_no and symptom variables yet cre... Go to Tasks>Describe. Try a few of the procedures to see what they give you. You're probably looking for a table analysis or a one way freq. If you really only want the first record of a data set then look at TASKS>DATA>SORT. Under the options for the Sort procedure you can keep just the first of each sorted field.Hello, I have a SAS query that has been giving me trouble for quite some time (I am using SAS 9.4). I hope that the SAS community user groups can help. I have a data set that contains ID, Location, start date, end date and the difference between the first end date and the next end date. For the ...First. means First occurrence in the data .First. means Last occurrence in the data .We need to sort data whenever we are using first. or last. based on our ...Re: Reshaping a large data set from long to wide. Posted 10-20-2015 12:53 PM (6870 views) | In reply to mcdj. You can use two variables to uniquely define your individuals. PROC MEANS; BY HTID SEX; for example. Or you can make a new unique id variable if you want. data want ; set have; by htid sex; uid + first.sex ;Finding duplicates is simple with SAS “FIRST.” and “LAST.” expressions. Find duplicates save resources, ie, money, that can be used for other tasks. Using the FIRST. And LAST. expressions is a quick and easy way to find duplicated data. Using SAS expressions can save a lot of coding time. Author Clarence Wm. Jackson, CSQAHi @mlensing,. There are various ways to achieve what you want. draycut's suggestion is short and elegant.To sort the non-missing SSN values first in ascending order, followed by the missing values, you could create an additional sort key in your DATA step:... set work.Contact_IA work.Contact_MS work.Contact_UT(in=UT); nossn=UT;... The IN= dataset option creates a temporary 0-1 flag so that UT ...April 30, 2024 at 4:34 AM PDT. Listen. 1:32. A takeover of Anglo American Plc would need to be pitched at more than £30 ($37.6) per share, a higher price than BHP Group Ltd. offered last week ...This is a SUM statement . SAS evaluates boolean expressions to 1 (TRUE) or 0 (FALSE). So when FIRST.Y is TRUE it has a value of 1. So when this observation is the first one with this value of Y (within the current value of X) the counter is incremented by 1.
The following code is not attempting to solve your logic issue, just to show the values of the first and last created variables so you can follow along and see if your logic matches the values you attempted to use. data selectx; input varname $ countx ; datalines ; AA1 1. AA1 2.. Is premier parking at walnut creek worth it
April 30, 2024 at 4:34 AM PDT. Listen. 1:32. A takeover of Anglo American Plc would need to be pitched at more than £30 ($37.6) per share, a higher price than BHP …In that case, SAS would not set any flags or automatic variables other than _N_, _ERROR_, etc. However, if you WANT to use FIRST.byvar and LAST.byvar processing then you have to "turn them on" with a BY statement inside your DATA step program. So the 2 BY statements in your code are really independent of each other.Feb 26, 2018 · BY-group processing in the DATA step is a fundamental operation that belongs in every SAS programmer's tool box. Use FIRST. and LAST. variables to find count the size of groups. The first example uses data from the Sashelp.Heart data set, which contains data for 5,209 patients in a medical study of heart disease. The data are distributed with SAS. first. last. and comparing with previous observation. Hello all, I would like to output records of AEOUT which are being collected incorrectly for the same AEDECOD. For instance, consider the 1st row obs AETOXGR = 2 and has AEOUT="NOT RECOVERED/NOT RESOLVED. The next 2nd row obs has AETOXGR=3 with AEOUT = "NOT RECOVERED/NOT RESOLVED".temporary variables: FIRST.Age and LAST.Age. SAS reads ahead by one observation as it passes through the data and sets the automatic variable values to 1 when the first or last values in a group are processed and 0 otherwise. The FIRST.variable and LAST.variable values indicate whether an observation is: • the first in a BY groupFor instance: 1) Customer Name Customer ID Address Customer Type. Joe Doe 123 123 Way Online (retain) Joe Doe 123 123 Way In-Store (delete) Ken Moore 456 456 Way Online (retain) Ken Moore 456 456 Way In-Store (delete) Lisa Mae 789 789 Way In-Store (retain) I want to keep the "Online" record (if duplicates) and delete the "In-Store" records ...May 19, 2017 ... Comments · 5 Browsing descriptor portion of SAS dataset sorting data eliminating duplicates · 5 SQL Data Analysis Projects You NEED | Portfolio ...The program shows that you can find the first day of the previous month, the last day of the previous month, the middle of the previous month, or an anniversary of the specified date. In particular, the program answers the programmer's question by showing a concise "one-liner" that you can use to get the first and last days of the previous month.Hi @singhsahab, You can also use the SCAN function to extract the last "word" (second argument -1) of the string, treating all non-digit characters as delimiters (fourth argument 'kd', third argument empty). data want; set have; string=scan(string,-1,,'kd'); run; View solution in original post. 8 Likes.Then using first. and last. variables and 2 cumulative (summarized) variables, you can generate this #1 report using the data set created in the DATA step program. I also included 2 separate steps for PROC REPORT and PROC TABULATE that generate the numbers you want without using a DATA step program:While you may have obscure problems with names like Vincent Van Gogh, your basic idea for first and last name are correct. You can check whether there are 3 names, and only assign the middle name if there is one. The DATA step syntax is easy: if countw (fullname) > 2 then second = scan (fullname, 2, ' '); The SQL syntax is harder, and just a ...You can make use of the first. variable in the following way using enumeration within groups. As you would like to retain the 2 most recent records for each name, proceed by sorting them as follows: BY name DESCENDING date; SET mydata; count + 1; BY name DESCENDING date; IF FIRST.name THEN count=1; IF count<=2 THEN OUTPUT;INDEX v/s INDEXC v/s INDEXW in SAS. INDEX - It searches a specified substring and returns the position of its first occurrence from the character string.; INDEXC - It searches characters from a specified substring and returns the position of the first occurrence of any character from a given substring.; INDEXW - It searches for the exact character, word, or substring mentioned in the ...would be or even what the last variable in the list would be when the code was written. In the above example for &pggrp = 016_017 the string FIRST.&&KEY&KEYCNT resolves to FIRST.OCC1. Since there are three variables in the BY statement, &KEYCNT is 3, and &KEY3 is OCC1. BUILDING FROM A SAS DATA SET Often the information needed to construct theWith first. or last, you will output a raw tagged as first or last of a series according to the by statement specified (be sure to prior sort a dataset.). The first row in your output dataset is not included in the source dataset. Please, always post your attempt, also if poor. - stat. Jun 1, 2015 at 6:49.If you don't have a WHERE statement in your DATA step already, that would be the simple solution. Change this: if vistdat le &cutdate; to this: where vistdat le &cutdate; The WHERE statement subsets differently than IF. When using IF, the DATA step reads in observations then deletes some of them..
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