topic Re: How to use macro to store the value of median for a variable? Options in ODS and Base Reporting

How to use macro to store the value of median for a variable? Options

deleted_user — Wed, 31 Oct 2007 22:39:49 GMT

Hi Guys:

My overall objective is: From the dataset, I want to compute the
median of variable A, and use this value,(say median) to create a
dummy variable, D, where D=1 if A_i>=median and 0 otherwise.(i stands
for the ith observation of variable A).

How to do that using macro because I need to create this kind of dummy
variables for many different datasets. Thanks in advance!!!

Richard

Re: How to use macro to store the value of median for a variable? Options

Cynthia_sas — Thu, 01 Nov 2007 01:24:38 GMT

Hi:
This is not really an ODS or BASE Reporting procedure (PRINT, REPORT, TABULATE) question. Your best bet for help with this question is to search for user group papers on applications for macro variables or to contact Tech Support.
For example, here are a few user group papers that might be relevant:
http://www2.sas.com/proceedings/sugi24/Coders/p087-24.pdf
http://www2.sas.com/proceedings/sugi28/090-28.pdf
http://ndc.mayo.edu/mayo/research/biostat/sasmacros.cfm

cynthia

Re: How to use macro to store the value of median for a variable? Options

advoss — Thu, 01 Nov 2007 13:42:51 GMT

Try this:



%macro flag_median(var=,inmem=,outmem=);

proc summary data=&inmem nway missing;

  var &var;

  output out=median(drop=_type_) median=;

run;

proc sql noprint;

  select &var,_freq_ into :median separated by ' ',:count separated by ' '

    from median;

  quit;

proc delete data=median;

run;

%put Median for &count observations of variable <&var> is &median;

data &outmem;

  set &inmem;

  &var._median = &median;

  flag_&var = (&var => &var._median);

run;

proc print data=&outmem;

run; 

%mend  flag_median;

%flag_median(var=Height,inmem=sashelp.class,outmem=outstuff);

Re: How to use macro to store the value of median for a variable? Options

deleted_user — Thu, 01 Nov 2007 16:16:58 GMT

Thanks guys!