topic Re: how to suppress warnings in LOG for fisher exact in SAS Procedures

how to suppress warnings in LOG for fisher exact

srikala — Fri, 10 Nov 2017 11:31:43 GMT

Hi,

See the attachment of log, from the ODS statement the 3 datasets are generating Cross,Fe and diff10.

The variable CNT has value of 0 and hence 'FE', 'Diff10' are giving warnings.

There is no other option to consider Zeros ,as i already given 'Zeros' in weight statement.

I have no problem with results/Outputs. Is there any option to suppress the warnings in log?

Thanks in Advance.

Srikala

Re: how to suppress warnings in LOG for fisher exact

Ksharp — Fri, 10 Nov 2017 12:57:06 GMT

proc freq data=sashelp.class ;
table sex*age/chisq NOWARN;   /* CHISQ(WARN=NOLOG)  */
run;

Re: how to suppress warnings in LOG for fisher exact

srikala — Fri, 10 Nov 2017 12:59:52 GMT

Hi Sharp, Thanks for the reply.

But my methods are fisher exact and riskdiff, not Chisq. NOWARN option will not work for me.

Re: how to suppress warnings in LOG for fisher exact

Ksharp — Fri, 10 Nov 2017 13:09:54 GMT

IF yours is 2x2 contingency table ,CHISQ will automatically generate FISHER EXACT test.

Re: how to suppress warnings in LOG for fisher exact

Rick_SAS — Fri, 10 Nov 2017 16:23:05 GMT

The warning is there because it is not clear whether a zero entry is a STRUCTURAL zero (eg, the number of men how were pregnant) or a SAMPLING zero (eg, the number of men in the study who had breast cancer). The EXACT statement assumes that it is a sampling zero and considers tables for which that cell is nonzero when computing the p-value.

More about EXACT tests in PROC FREQ.