Re: [Matplotlib-users] images from data

[Michael V. De P. <mde...@ma...>]

On Sat, Apr 29, 2006 at 09:59:14AM -0700, Andrew Straw wrote:
> If you data is regularly spaced, you can just use imshow or pcolor. If
> it's not regularaly spaced, see
> http://www.scipy.org/Wiki/Cookbook/Matplotlib/Gridding_irregularly_spaced_data

Perhaps I'm missing something or did not explain my problem
properly. I am well aware that what I want to use is imshow (or,
apparently, pcolor). However, my problem is that I have all THREE
values in data form, not just x and y (that is, I do not have a
function to get z(x, y), but rather I have data points for z).

I do not see a straightforward way to use imshow or pcolor to be able
to plot this data as they want a matrix that I have no idea how to
generate.

Thanks,

Mike

> 
> Michael V. De Palatis wrote:
> 
> >Hi all,
> >
> >I am trying to use imshow to plot an image from some data. Basically,
> >I have a list of x, y, and z values, and I want to plot z as a
> >function of x and y.
> >
> >Unfortunately, most of the  examples do this as far as I can
> >tell. Instead, they (at most) take a list of x and y then make a
> >*function* z out of that, and plot z, rather than having actual data
> >from a file for all three.
> >
> >The only one that does seem to do something like this seems to be
> >dependent on a binary file, which unfortunately is not the format I
> >have the data in. Sure, I could convert the very large files I already
> >have into binary, but in the long run, I think it would be better for
> >me to be able to simply use the ASCII data that I am provided with
> >since that can't be changed.
> >
> >Is there an easy way to do this, or will I just have to convert the
> >files?
> >
> >Thanks,
> >
> >Mike
> >
> >
> >-------------------------------------------------------
> >Using Tomcat but need to do more? Need to support web services, security?
> >Get stuff done quickly with pre-integrated technology to make your job easier
> >Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> >http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> >_______________________________________________
> >Matplotlib-users mailing list
> >Mat...@li...
> >https://lists.sourceforge.net/lists/listinfo/matplotlib-users
> >  
> >