Re: [Matplotlib-users] Ploting a sparse matrix with imshow

[Jeff W. <js...@fa...>]

On 2/19/12 1:18 PM, Jose Guzman wrote:
> Dear matplotlib users,
>
> I am trying to plot a nxn symetric matrix containing zeros (in white) 
> and ones (in black). Quite simple, I guessed. For that I use imshow as 
> follows:
>
> >>> imshow(W, cmap=cm.binary) # W is a Numpy Array with shape (100,100)
>
> However, this does not work the way i would like (the ones appear very 
> blur). I would need the correct representation of a grid where the 
> possition 0,0 is simply the entry W[0,0] of my array.
>
> There should be an easy way to plot this matrix, bu I cannot figure it 
> out.
>
> Thanks for your help in advance.
>
> Jose

Jose: I think you need to add interpolation='nearest' to get rid of the 
blurriness.

-Jeff