I've submitted a patch to the source code via the patches tracker, under the 
name 'plssubmem function'. 

The patch incorporates is for the addition of a plssubmem function similar to 
plsmem except that it takes parameters specifying a subregion of the memory 
region to plot to. Clipping is handled in the case where the subregion falls 
outside the allocated memory. 

The major modification is to the mem driver. Other pl functions are not 
impacted. 

-- 
David Gillard, BA, BSc 
Software Developer 
Pangeo Subsea 
www.pangeosubsea.com 
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