[Numpy-discussion] Index update

[Mads Ipsen]

Hi,

Suppose you have N items, say N = 10.

Now a subset of these items are selected given by a list A of indices. 
Lets say that items A = [2,5,7] are selected. Assume now that you delete 
some of the items given by the indices S = [1,4,8]. This means that the 
list of indices A must be updated, since items have been deleted. For 
this particular case the updated selection list A becomes A = [1,3,5].

Is there some smart numpy way of doing this index update of the selected 
items in A without looping? Typically N is large.

Best regards,

Mads

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