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12-06-2010 08:18 AM

Hi,

I have a DataSet with column col_EXP, which contains date expression, e.g:

DATA test;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

Now, I would like to create a new column col_DT with computed date from expression in column col_EXP.

data test2;

set test;

col_DT = ????;

run;

I have tried with call symput, symget and resolve funcions but without any success

Can anyone help me?

I have a DataSet with column col_EXP, which contains date expression, e.g:

DATA test;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

Now, I would like to create a new column col_DT with computed date from expression in column col_EXP.

data test2;

set test;

col_DT = ????;

run;

I have tried with call symput, symget and resolve funcions but without any success

Can anyone help me?

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12-06-2010 12:59 PM

Lucas,

There has GOT to be a less convoluted way than the one I'll propose but, if this is something that you HAVE to get done, the following might provide what you need:

DATA test;

length col_EXP $50;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

filename ft17f001 temp;

data _null_;

file ft17f001;

set test end=lastone;

if _n_ eq 1 then do;

put 'data test2;';

put +3 'format col_DT date9.;';

end;

put +3 'col_DT=' col_EXP ';';

put +3 'output;';

if lastone then put 'Run;';

run;

%inc ft17f001 / source2;

data test2;

set test;

set test2;

run;

HTH,

Art

There has GOT to be a less convoluted way than the one I'll propose but, if this is something that you HAVE to get done, the following might provide what you need:

DATA test;

length col_EXP $50;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

filename ft17f001 temp;

data _null_;

file ft17f001;

set test end=lastone;

if _n_ eq 1 then do;

put 'data test2;';

put +3 'format col_DT date9.;';

end;

put +3 'col_DT=' col_EXP ';';

put +3 'output;';

if lastone then put 'Run;';

run;

%inc ft17f001 / source2;

data test2;

set test;

set test2;

run;

HTH,

Art

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12-06-2010 01:01 PM

Hello Lucas,

I am not quite sure why you use this approach. Could you explain your goal in more detail? Anyway, this can be achieved with macro variables like this:

[pre]

DATA _null_t;

%let col_EXP1=intnx('day',today(),2);

%let col_EXP2=intnx('day',today(),10);

RUN;

data Result;

col_DT = &col_EXP1; ouput;

col_DT = &col_EXP2; ouput;

format col_DT date7.;

run;

[/pre]

I do not think it is what you need. This is why I' like to know more details.

Sincerely,

SPR

I am not quite sure why you use this approach. Could you explain your goal in more detail? Anyway, this can be achieved with macro variables like this:

[pre]

DATA _null_t;

%let col_EXP1=intnx('day',today(),2);

%let col_EXP2=intnx('day',today(),10);

RUN;

data Result;

col_DT = &col_EXP1; ouput;

col_DT = &col_EXP2; ouput;

format col_DT date7.;

run;

[/pre]

I do not think it is what you need. This is why I' like to know more details.

Sincerely,

SPR

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12-06-2010 03:54 PM

Here is an alternative macro solution, although no less convoluted.

[pre]

DATA test;

length col_EXP $50;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

proc sql noprint;

select count(*) into: num_expressions

from test;

%let num_expressions = &num_expressions;

select col_EXP into :col_EXP1-:col_EXP&num_expressions

from test;

quit;

%macro test;

%do i = 1 %to &num_expressions;

col_EXP ="&&&col_exp&i";

col_DT = &&&col_exp&i;

output;

%end;

%mend;

data test1;

%test

run;

[/pre]

[pre]

DATA test;

length col_EXP $50;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

proc sql noprint;

select count(*) into: num_expressions

from test;

%let num_expressions = &num_expressions;

select col_EXP into :col_EXP1-:col_EXP&num_expressions

from test;

quit;

%macro test;

%do i = 1 %to &num_expressions;

col_EXP ="&&&col_exp&i";

col_DT = &&&col_exp&i;

output;

%end;

%mend;

data test1;

%test

run;

[/pre]

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12-06-2010 06:37 PM

Hi,

thank you all for a quick response! Sorry for my english

@art2897

Thanks! I wrote something similar to your program. Tommorow I will try to paste my code. It works fine but as you said it is quite complex. How works 'put +3' statement in your code?

@SPR

The expression must be define in a permanent DataSet. Based on this expression a newcolumn col_DT is computed. I hope I explained problem more precisely.

@polingjw

yeah your macro is convoluted. Great exercise to practise macro variables

================================

Let's try to find a solution in one DataStep!

I have tried something like this (in many many combinations :/):

DATA test;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

DATA test2;

set test;

call symput ('col_EXP_DT', col_EXP);

col_DT = symget('col_EXP_DT');

RUN;

But unfortunately symget does not resolved the expression

thank you all for a quick response! Sorry for my english

@art2897

Thanks! I wrote something similar to your program. Tommorow I will try to paste my code. It works fine but as you said it is quite complex. How works 'put +3' statement in your code?

@SPR

The expression must be define in a permanent DataSet. Based on this expression a newcolumn col_DT is computed. I hope I explained problem more precisely.

@polingjw

yeah your macro is convoluted. Great exercise to practise macro variables

================================

Let's try to find a solution in one DataStep!

I have tried something like this (in many many combinations :/):

DATA test;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

DATA test2;

set test;

call symput ('col_EXP_DT', col_EXP);

col_DT = symget('col_EXP_DT');

RUN;

But unfortunately symget does not resolved the expression

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12-06-2010 09:49 PM

Hi:

About this code:

[pre]

DATA test2;

set test;

call symput ('col_EXP_DT', col_EXP);

col_DT = symget('col_EXP_DT');

RUN;

[/pre]

You cannot both create and use a macro variable within 1 DATA step program. That means if you create &col_EXP_DT in a DATA step program, that a step boundary must be encountered before you USE &col_EXT_DT in a program.

See this Tech Support note (and the Macro Facility documentation) for more details:

http://support.sas.com/kb/23/182.html

cynthia

About this code:

[pre]

DATA test2;

set test;

call symput ('col_EXP_DT', col_EXP);

col_DT = symget('col_EXP_DT');

RUN;

[/pre]

You cannot both create and use a macro variable within 1 DATA step program. That means if you create &col_EXP_DT in a DATA step program, that a step boundary must be encountered before you USE &col_EXT_DT in a program.

See this Tech Support note (and the Macro Facility documentation) for more details:

http://support.sas.com/kb/23/182.html

cynthia

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12-07-2010 02:29 PM

...

> You cannot both create and use a macro variable within

> 1 DATA step program. That means if you create

> &col_EXP_DT in a DATA step program, that a step

> boundary must be encountered before you USE

> &col_EXT_DT in a program.

>

> See this Tech Support note (and the Macro Facility

> documentation) for more details:

> http://support.sas.com/kb/23/182.html

...

I guess the note is not 100% clear if even a long time user ends up drawing a wrong conclusion like that. You definitely *can* both create and use a macro variable within a data step.

[pre]

%symdel mvar;

data _null_;

call symput('mvar', 'what');

something = resolve('&mvar');

put something=;

run;

/* on log

something=what

*/

[/pre] Message was edited by: chang_y_chung@hotmail.com

> You cannot both create and use a macro variable within

> 1 DATA step program. That means if you create

> &col_EXP_DT in a DATA step program, that a step

> boundary must be encountered before you USE

> &col_EXT_DT in a program.

>

> See this Tech Support note (and the Macro Facility

> documentation) for more details:

> http://support.sas.com/kb/23/182.html

...

I guess the note is not 100% clear if even a long time user ends up drawing a wrong conclusion like that. You definitely *can* both create and use a macro variable within a data step.

[pre]

%symdel mvar;

data _null_;

call symput('mvar', 'what');

something = resolve('&mvar');

put something=;

run;

/* on log

something=what

*/

[/pre] Message was edited by: chang_y_chung@hotmail.com

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12-07-2010 03:26 PM

The posted TS Note says that:

You cannot use a__macro variable reference__ to retrieve the value of a macro variable

What they mean is a "simple" &macvar form of reference. There are other techniques, as you have shown. But the most common issue is trying to use a simple &macvar in the same step where it is created.

cynthia

You cannot use a

What they mean is a "simple" &macvar form of reference. There are other techniques, as you have shown. But the most common issue is trying to use a simple &macvar in the same step where it is created.

cynthia

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12-06-2010 10:20 PM

There is another problem.

You need assign long enough space for variable col_EXP.

[pre]

DATA test;

**length col_EXP $ 100;**

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

DATA test2;

set test;

call symput (cats('col_EXP_DT',_n_), col_EXP);

col_DT = symget('col_EXP_DT');

RUN;

%put _user_;

[/pre]

Ksharp

You need assign long enough space for variable col_EXP.

[pre]

DATA test;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

DATA test2;

set test;

call symput (cats('col_EXP_DT',_n_), col_EXP);

col_DT = symget('col_EXP_DT');

RUN;

%put _user_;

[/pre]

Ksharp

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12-06-2010 10:36 PM

What about the invalid argument message with your code? cynthia

[pre]

492

493 DATA test2;

494 set test;

495 call symput (cats('col_EXP_DT',_n_), col_EXP);

496 col_DT = symget('col_EXP_DT');

497 RUN;

NOTE: Invalid argument to function SYMGET at line 496 column 10.

col_EXP=intnx('day',today(),2) col_DT= _ERROR_=1 _N_=1

NOTE: Invalid argument to function SYMGET at line 496 column 10.

col_EXP=intnx('day',today(),10) col_DT= _ERROR_=1 _N_=2

NOTE: There were 2 observations read from the data set

WORK.TEST.

NOTE: The data set WORK.TEST2 has 2 observations and 2

variables.

NOTE: DATA statement used (Total process time):

real time 0.14 seconds

cpu time 0.01 seconds

[/pre]

[pre]

492

493 DATA test2;

494 set test;

495 call symput (cats('col_EXP_DT',_n_), col_EXP);

496 col_DT = symget('col_EXP_DT');

497 RUN;

NOTE: Invalid argument to function SYMGET at line 496 column 10.

col_EXP=intnx('day',today(),2) col_DT= _ERROR_=1 _N_=1

NOTE: Invalid argument to function SYMGET at line 496 column 10.

col_EXP=intnx('day',today(),10) col_DT= _ERROR_=1 _N_=2

NOTE: There were 2 observations read from the data set

WORK.TEST.

NOTE: The data set WORK.TEST2 has 2 observations and 2

variables.

NOTE: DATA statement used (Total process time):

real time 0.14 seconds

cpu time 0.01 seconds

[/pre]

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12-07-2010 01:25 AM

Cynthia.

I have not received these NOTEs.

I am using SAS 9.2 TS1M0 for Windows.

The following is my LOG.

[pre]

132

133 DATA test2;

134 set test;

135 call symput (cats('col_EXP_DT',_n_), col_EXP);

136 col_DT = symget('col_EXP_DT');

137 RUN;

NOTE: There were 2 observations read from the data set WORK.TEST.

NOTE: The data set WORK.TEST2 has 2 observations and 2 variables.

NOTE: DATA statement used (Total process time):

real time 0.27 seconds

cpu time 0.01 seconds

138 %put _user_;

GLOBAL COL_EXP_DT intnx('day',today(),2)

GLOBAL COL_EXP_DT1 intnx('day',today(),2)

GLOBAL COL_EXP_DT2 intnx('day',today(),10)

[/pre]

Ksharp

I have not received these NOTEs.

I am using SAS 9.2 TS1M0 for Windows.

The following is my LOG.

[pre]

132

133 DATA test2;

134 set test;

135 call symput (cats('col_EXP_DT',_n_), col_EXP);

136 col_DT = symget('col_EXP_DT');

137 RUN;

NOTE: There were 2 observations read from the data set WORK.TEST.

NOTE: The data set WORK.TEST2 has 2 observations and 2 variables.

NOTE: DATA statement used (Total process time):

real time 0.27 seconds

cpu time 0.01 seconds

138 %put _user_;

GLOBAL COL_EXP_DT intnx('day',today(),2)

GLOBAL COL_EXP_DT1 intnx('day',today(),2)

GLOBAL COL_EXP_DT2 intnx('day',today(),10)

[/pre]

Ksharp

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12-07-2010 02:31 AM

How did you get &COL_EXP_DT (without a number) in your global symbol table?? You appended _N_ to the macro variable name in the CALL SYMPUT statement in your program. That should have created ONLY &COL_EXP_DT1 and &COL_EXP_DT2.

If &COL_EXP_DT (without a number) does not exist, then you will get the invalid argument message. I suspect the reason you're not seeing the message is that in some previous test run you actually created &COL_EXP_DT.

But really, it's a moot point about the message, because I believe the original poster did NOT just want to see the text string with the INTNX function, I think he actually wanted to have the INTNX function execute. And, I agree with ArtC and other responders who have indicated that what is being shown 1) doesn't make sense and 2) probably doesn't require a macro variable.

I just don't think a lot of time needs to be spent coming up with more variations to do something that is not well-explained on data that is not fully understandable. If we understood a bit more about the real data and the real scenario and the actual task to be accomplished, someone might have a useful suggestion.

cynthia

If &COL_EXP_DT (without a number) does not exist, then you will get the invalid argument message. I suspect the reason you're not seeing the message is that in some previous test run you actually created &COL_EXP_DT.

But really, it's a moot point about the message, because I believe the original poster did NOT just want to see the text string with the INTNX function, I think he actually wanted to have the INTNX function execute. And, I agree with ArtC and other responders who have indicated that what is being shown 1) doesn't make sense and 2) probably doesn't require a macro variable.

I just don't think a lot of time needs to be spent coming up with more variations to do something that is not well-explained on data that is not fully understandable. If we understood a bit more about the real data and the real scenario and the actual task to be accomplished, someone might have a useful suggestion.

cynthia

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12-07-2010 02:50 AM

Cynthia.

&COL_EXP_DT (without a number) is actually from OP's code and I revise it,then got this curious result.

And I receive these notes as yours.

When I close SAS session and re-run the code,the following is LOG.

[pre]

6

7 DATA test2;

8 set test;

9 call symput (cats('col_EXP_DT',_n_), col_EXP);

10 col_DT = symget('col_EXP_DT');

11 RUN;

NOTE: Invalid argument to function SYMGET at line 10 column 10.

col_EXP=intnx('day',today(),2) col_DT= _ERROR_=1 _N_=1

NOTE: Invalid argument to function SYMGET at line 10 column 10.

col_EXP=intnx('day',today(),10) col_DT= _ERROR_=1 _N_=2

NOTE: There were 2 observations read from the data set WORK.TEST.

NOTE: The data set WORK.TEST2 has 2 observations and 2 variables.

NOTE: DATA statement used (Total process time):

real time 0.22 seconds

cpu time 0.05 seconds

12 %put _user_;

GLOBAL COL_EXP_DT1 intnx('day',today(),2)

GLOBAL COL_EXP_DT2 intnx('day',today(),10)

[/pre]

and maybe change it a little more.

[pre]

DATA test2;

set test;

call symput (cats('col_EXP_DT',_n_), col_EXP);

**col_DT = symget(cats('col_EXP_DT',_n_));**

RUN;

%put _user_;

[/pre]

then These notes will not appear again.

[pre]

18

19 DATA test2;

20 set test;

21 call symput (cats('col_EXP_DT',_n_), col_EXP);

22 col_DT = symget(cats('col_EXP_DT',_n_));

23 RUN;

NOTE: There were 2 observations read from the data set WORK.TEST.

NOTE: The data set WORK.TEST2 has 2 observations and 2 variables.

NOTE: DATA statement used (Total process time):

real time 0.05 seconds

cpu time 0.02 seconds

24 %put _user_;

GLOBAL COL_EXP_DT1 intnx('day',today(),2)

GLOBAL COL_EXP_DT2 intnx('day',today(),10)

[/pre]

Ksharp

&COL_EXP_DT (without a number) is actually from OP's code and I revise it,then got this curious result.

And I receive these notes as yours.

When I close SAS session and re-run the code,the following is LOG.

[pre]

6

7 DATA test2;

8 set test;

9 call symput (cats('col_EXP_DT',_n_), col_EXP);

10 col_DT = symget('col_EXP_DT');

11 RUN;

NOTE: Invalid argument to function SYMGET at line 10 column 10.

col_EXP=intnx('day',today(),2) col_DT= _ERROR_=1 _N_=1

NOTE: Invalid argument to function SYMGET at line 10 column 10.

col_EXP=intnx('day',today(),10) col_DT= _ERROR_=1 _N_=2

NOTE: There were 2 observations read from the data set WORK.TEST.

NOTE: The data set WORK.TEST2 has 2 observations and 2 variables.

NOTE: DATA statement used (Total process time):

real time 0.22 seconds

cpu time 0.05 seconds

12 %put _user_;

GLOBAL COL_EXP_DT1 intnx('day',today(),2)

GLOBAL COL_EXP_DT2 intnx('day',today(),10)

[/pre]

and maybe change it a little more.

[pre]

DATA test2;

set test;

call symput (cats('col_EXP_DT',_n_), col_EXP);

RUN;

%put _user_;

[/pre]

then These notes will not appear again.

[pre]

18

19 DATA test2;

20 set test;

21 call symput (cats('col_EXP_DT',_n_), col_EXP);

22 col_DT = symget(cats('col_EXP_DT',_n_));

23 RUN;

NOTE: There were 2 observations read from the data set WORK.TEST.

NOTE: The data set WORK.TEST2 has 2 observations and 2 variables.

NOTE: DATA statement used (Total process time):

real time 0.05 seconds

cpu time 0.02 seconds

24 %put _user_;

GLOBAL COL_EXP_DT1 intnx('day',today(),2)

GLOBAL COL_EXP_DT2 intnx('day',today(),10)

[/pre]

Ksharp

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12-06-2010 10:34 PM

Aside that this does not work the way you want, again we ask what are you trying to do?

If you want to create a new variable then no macro variables are needed.

[pre]

DATA test;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

DATA test2;

set test;

col_DT = col_exp;

RUN;

[/pre]

But even this does not make any sense.

If you want to create a new variable then no macro variables are needed.

[pre]

DATA test;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

DATA test2;

set test;

col_DT = col_exp;

RUN;

[/pre]

But even this does not make any sense.

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12-07-2010 03:25 AM

Macro statement can solve your problem.

And I think 'call symput, symget, resolve' would not solve your problem,because you request to dynamic invoke Macro variables ,it is hard to achieve.

[pre]

DATA test;

length col_EXP $ 100;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

DATA _null_;

set test nobs=num_obs;

call symput (cats('col_EXP_DT',_n_), col_EXP);

call symput ('nobs',num_obs);

RUN;

%put _user_;

%macro data;

data test2;

set test;

if _n_ eq 1 then col_DT=&col_EXP_DT1;

%do i=2 %to &nobs;

else if _n_ eq &i then col_DT=&&col_EXP_DT&i ;

%end;

format col_DT yymmdd10.;

run;

%mend;

%data

proc print;run;

[/pre]

Ksharp Message was edited by: Ksharp

And I think 'call symput, symget, resolve' would not solve your problem,because you request to dynamic invoke Macro variables ,it is hard to achieve.

[pre]

DATA test;

length col_EXP $ 100;

col_EXP="intnx('day',today(),2)";output;

col_EXP="intnx('day',today(),10)";output;

RUN;

DATA _null_;

set test nobs=num_obs;

call symput (cats('col_EXP_DT',_n_), col_EXP);

call symput ('nobs',num_obs);

RUN;

%put _user_;

%macro data;

data test2;

set test;

if _n_ eq 1 then col_DT=&col_EXP_DT1;

%do i=2 %to &nobs;

else if _n_ eq &i then col_DT=&&col_EXP_DT&i ;

%end;

format col_DT yymmdd10.;

run;

%mend;

%data

proc print;run;

[/pre]

Ksharp Message was edited by: Ksharp