# Plot the PP vs gwtime for one gridpoint

**URL:** <https://forum.itascainternational.com/t/plot-the-pp-vs-gwtime-for-one-gridpoint/1330>\
**Category:** FLAC\
**Created:** [February 21, 2024, 7:39am UTC](https://forum.itascainternational.com/t/plot-the-pp-vs-gwtime-for-one-gridpoint/1330 "2024-02-21T07:39:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Derek](https://avatars.discourse-cdn.com/v4/letter/d/b38774/32.png) [@Derek](https://forum.itascainternational.com/u/Derek)\
**Post date:** [February 21, 2024, 7:39am UTC](https://forum.itascainternational.com/t/plot-the-pp-vs-gwtime-for-one-gridpoint/1330/1 "2024-02-21T07:39:10Z")

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Hi Flac support team,  
I would like to plot the variation of the PWP for one gridpoint (e.g., (1,1) versus the gwtime, but I forget to add the command "history pp i=1 j=1’’ in the calcuation file. The “history gwtime” has been added.  
Is it still possible to plot the figure (PP (i=1,j=1) vs gwtime) at the end of the calcuaiton by using command?  
thanks!  
Derek

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**Author:** ![jwang](https://avatars.discourse-cdn.com/v4/letter/j/b782af/32.png) [@jwang](https://forum.itascainternational.com/u/jwang)\
**Post date:** [February 21, 2024, 2:42pm UTC](https://forum.itascainternational.com/t/plot-the-pp-vs-gwtime-for-one-gridpoint/1330/2 "2024-02-21T14:42:32Z")

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You have to add the command and rerun your model, FLAC will not extract the history data for pp at i=1 j=1 if you don’t have the command prior to the calculation.