assign to part of possibly uninitialized variable is flagged as UB (but only in 2018 edition) #60450 Closed jethrogb opened this issue May 1, 2019 · 11 comments

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

If no later statement gives it a value, SAS prints a note in the log that the variable is uninitialized. NOTE: Variable 'first.something'n is uninitialized. NOTE: Variable 'last.something'n is uninitialized. So no warnings, but if you are careful, you can avoid this mistake, because name “uninitialized” usually isn‘t what you want to see in your SAS log and you should check that everything really worked the way it was supposed to work. In SAS tips & tricks #9, we looked at what happens when SAS encounters an uninitialized variable within a DATA Step.Here we look at the possibly more serious scenario of what happens when SAS cannot find a reqruied variable within a PROC Step.

Sas variable is uninitialized

RUN; RUN THE LOG The variable a is an int with automatic storage duration. The example code above is trying to print the value of an uninitialized variable (a was never initialized). Automatic variables which are not initialized have indeterminate values; accessing these can lead to undefined behavior. Re: Variable X is uninitialized.

• using a compound name SAS Global Forum 2007 Coders’ Corner available in the SAS System. The first technique is to use the colon (:) operator modifier to truncate the lengths of the longer values. This eliminates the need for the SUBSTR function and/or creating additional variables.

Comparisons. The FIND method returns a value that indicates whether the key is stored in the hash object. If the key is in the hash object, then the FIND method also sets the data variable to the value of the data item so that it is available for use after the method call.

No note indicating that missing values were generated is written to the SAS log, as shown below. Partial SAS Log 3 data Quarter1; 2021-04-15 · Using uninitialized variables is one of the most common mistakes that novice programmers make, and unfortunately, it can also be one of the most challenging to debug (because the program may run fine anyway if the uninitialized variable happened to get assigned to a spot of memory that had a reasonable value in it, like 0). Se hela listan på documentation.sas.com THIS VARIABLE IS UNINITIALIZED Sometimes when one is coding a specified data set structure, some of the variables will be uninitialized.

8 Ny DOSUBL funktion för att köra SAS kod mitt i ett data steg data test; NOTE: Variable weihgt is uninitialized. options varinitchk=error; ERROR: Variable

Partial SAS Log 2 data January; 3 set sugi.salesdata; 4 if Month=1; 5 format Sale dollar11.2; 6 run; NOTE: Variable Sale is uninitialized. The variable name can be used directly, as in the above example, when the variable has a define type of GROUP, ORDER, COMPUTED, or DISPLAY. Temporary variables, variables that are created and only used in a compute block, are also always addressed directly by variable name.

You have to use the proper name of the variable If a variable appears for the first time on the right side of an assignment statement, SAS assumes that it is a numeric variable and that its value is missing.
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num_1=. num_2=. num_3=. NOTE: DATA statement used (Total process time): real time 0.00 seconds cpu time 0.00 seconds Note that the variable num_3 is missing from the list of SAS Notes on uninitialized because num_3 is assigned the value missing from the variable w I want to create something in SAS that works like an Excel lookup function.

felutskrifter, "Variable ARB1 is uninitialized" etc, dessa felutskrifter kan ignoreras, se 4.1 ovan, de kan också undvikas, se nedan.;. IF &R=1 THEN RV1=ARB1;. LIBRIS titelinformation: The little SAS book : a primer : a programming approach / Lora D. Delwiche and Susan J. Slaughter.
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felutskrifter, "Variable ARB1 is uninitialized" etc, dessa felutskrifter kan ignoreras, se 4.1 ovan, de kan också undvikas, se nedan.;. IF &R=1 THEN RV1=ARB1;.

NOTE: Variable 'last.something'n is uninitialized. So no warnings, but if you are careful, you can avoid this mistake, because name “uninitialized” usually isn‘t what you want to see in your SAS log and you should check that everything really worked the way it was supposed to work.

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Normally caused by an uninitialized register. This error is Max number of established MM SAs to peer exceeded. 0x0000363B, IKE tog Bad variable type.

You do still have some other bugs though, e.g. you use seconds as your input variable, but you then discard this and instead pass the uninitialised variable total to your function - you should probably just be using total as your input variable and get rid of seconds.