topic Re: Is there a way to plot loglogs (LLS) graph with very large data in SAS? in SAS Programming

Is there a way to plot loglogs (LLS) graph with very large data in SAS?

medic — Thu, 04 Apr 2019 01:59:34 GMT

Hello,

I'm trying to plot a loglog vs log graph using PROC LIFETEST in SAS, so that I can check the proportional hazard assumption with the data.

However, since I'm dealing with a very large data (appx. 7-million records) the system stops running with the error saying:

ERROR: JVM(Java virtual machine) exception. java.lang.OutOfMemoryError: Java heap space.

After with some searching, I increased the memory capacity from 128m to 1024m but the problem remains same.

Would there be any better options to plot the graph? or is there any other way (that my computer can handle) to check the proportional hazard assumption?

Thanks in advance

ods graphics on;
proc lifetest data=data plot=(lls) notable;
time tte*outcome(0);
strata treatment;
run;

Re: Is there a way to plot loglogs (LLS) graph with very large data in SAS?

Tom — Thu, 04 Apr 2019 02:59:08 GMT

Did you try just outputting the results to a dataset and writing your own code to make a graph?

Re: Is there a way to plot loglogs (LLS) graph with very large data in SAS?

medic — Thu, 04 Apr 2019 04:49:41 GMT

that seems reasonable. Thanks.
Could you help a little more about how I can get the results as a dataset?

Re: Is there a way to plot loglogs (LLS) graph with very large data in SAS?

PeterClemmensen — Thu, 04 Apr 2019 07:21:31 GMT

Add the line below to your code 🙂

ods output LogNegLogSurvivalPlot=LogNegLogSurvivalPlot;