[gradsusr] Simple query: Accumulated Rain??

[giacomo tricarico]

Hi, my WRF plots 17 files, from 00h to 48h, with 3h steps; so rain is accumulated each 3 hours.
BUT how could I have 12h and 24h accumulated rain with grads? So that I have respectively 4 and 2 images :)
Thanks,Giacomo 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20150909/a9114fd3/attachment.html