Tony,
Thanks for the pcolormesh suggestion! It is quite a bit faster than pcolor
for me (maybe 50-100x faster)!
Best,
Brad
On Tue, Dec 20, 2011 at 10:10 AM, Tony Yu <tsy...@gmail.com> wrote:
>
>
> On Tue, Dec 20, 2011 at 9:22 AM, Brad Malone <brad.mal...@gmail.com>wrote:
>
>> HI Paul,
>>
>> Thanks. I didn't realize it was that simple (appears that doing this
>> essentially plots everything against integers in x and y). This will be a
>> good backup plan if I can't get pcolor to work, although as you say, I'll
>> have to fiddle around some with the axis formatters and such I suppose to
>> get a good final plot out of this.
>>
>> Best,
>> Brad
>>
>> On Tue, Dec 20, 2011 at 12:12 AM, Paul Ivanov <pivanov...@gmail.com>wrote:
>>
>>> Hey again, Brad,
>>>
>>> Brad Malone, on 2011-12-19 23:44, wrote:
>>> > Hi, I am plotting a grid with pcolor. Below I've got a 1000x1000 grid.
>>> >
>>> > xi=linspace(-0.1,x[-1]+2,1000)
>>> > > yi=linspace(-0.1,maxfreq+10,1000)
>>> > > print 'Calling griddata...'
>>> > > zi=griddata(x,y,z,xi,yi,interp='nn')
>>> > > plt.pcolor(xi,yi,zi,cmap=plt.cm.hot)
>>> ...
>>> > How could I modify my above data (which is in xi,yi,and zi) to
>>> > work with imshow (which seems to take 1 argument for data).
>>>
>>> Try either:
>>>
>>> plt.matshow(zi,cmap=plt.cm.hot)
>>>
>>> or
>>>
>>> plt.imshow(zi,cmap=plt.cm.hot)
>>>
>>> The first should be the quickest - it doesn't do any
>>> fancy interpolation, and actually just passes some arguments to
>>> the second. Using imshow directly, however, allows you to set a
>>> different type of interpolation, should you desire it. If
>>> you want xi and yi to be accurately reflect in the plot, you
>>> might have to play around with changing the axis formatters
>>> (though there might be an easier way of doing that, which escapes
>>> me right now)
>>>
>>> best,
>>> --
>>> Paul Ivanov
>>>
>>
> You may also want to try:
>
> plt.pcolormesh(xi,yi,zi,cmap=plt.cm.hot)
>
> If I remember correctly, pcolormesh is faster but a bit more restrictive.
> (I think it's slower than matshow and imshow).
>
> -Tony
>
> P.S. I never knew about matshow; thanks Paul!
>
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