On Sep 26, 2008, at 2:28 PM, John Hunter wrote:
> On Fri, Sep 26, 2008 at 12:39 PM, Tony S Yu <[EMAIL PROTECTED]> wrote:
>
>> + if all(nonzero == False):
>> + raise ValueError('spy cannot plot sparse zeros
>> matrix')
>
> Is raising an exception the right choice here -- why can't we plot an
> all zeros image?
>
> JDH
I guess you could plot sparse all-zero matrices with image mode. My
only hesitation is that sparse arrays tend to be very large and (I
imagine) this would lead to very slow performance. I assumed this was
the reason image mode wasn't adapted to use sparse arrays.
Actually, now that I think about it: you could plot a trivially small
image and just adjust the coordinates so that they correspond to the
original matrix shape. Is this what you were thinking?
I should note that a dense zero array also fails to plot with spy *if
marker mode is used*.
-T
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