Re: drop array elements

["J.D. Smith" <jdsmith(at)astro.cornell.edu>]

Matthew Kay wrote:
> 
> Hi,
> 
> Would anyone have any suggestions for an easy way
> to drop elements in an array? For example, say 'a'
> is a 14x1024 array and 'b' is a 1x25 array of row
> indicies  in 'a' that should be dropped. Is there
> a simple command for re-assigning 'a', without the
> 25 rows indicated in 'b'?
> 
> Much thanks,
> Matt

a=a[*,where(histogram(b,MIN=0,MAX=(size(a,/DIMENSIONS))[1]-1,BINSIZE=1) eq 0)]

The real meat here is finding a list of indices which do not contain the
elements of b.  There are many ways to do this, but this is a fast one.  

JD

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