## matplotlib-users

 [Matplotlib-users] Ratio of a plot using matplotlib From: Yagua Rovi - 2010-01-14 17:37:03 ```I use matplotlib since two days only. I have done some things pretty good but I am now in front of a problem an I didn't found a solution in the documentation. I would like to draw the surface defined by the lists X, Y and the matrix Z. I get to a nice graphical output with the following code. My problem is that the labels on the axes indicate values corresponding to the indices in Tables X and Y or something like that. I would like to see the values between xmin and xmax, ymin and ymax. If I uncomment the lines set_xlim and set_ylim, the axes are properly represented, but the picture is shrinked into a corner. How to put the good values on the axes and correct the image full screen and correct scale ? Thank you in advance. #! /usr/bin/env python from pylab import * x=[0,1,2,3] y=[12, 32,81] z=[2,3,1,4,2,5,6,8,10,4,11,3] Z=zeros((len(x),len(y))) count=0 for i in range(0,len(x)): for j in range(0,len(y)): Z[i,j]=z[count] count=count+1 ax = subplot(111) im = imshow(Z, interpolation='bilinear') xmin=x[0] xmax=x[len(x)-1] ymin=y[0] ymax=y[len(y)-1] #ax.set_xlim(xmin,xmax) #ax.set_ylim(ymin,ymax) #axes().set_aspect('auto',adjustable='box') colorbar() show() ```
 Re: [Matplotlib-users] Ratio of a plot using matplotlib From: Andrew Straw - 2010-01-14 17:47:16 ```Yagua Rovi wrote: > I use matplotlib since two days only. I have done some things pretty > good but I am now in front of a problem an I didn't found a solution > in the documentation. > > I would like to draw the surface defined by the lists X, Y and the matrix Z. > I get to a nice graphical output with the following code. > My problem is that the labels on the axes indicate values > corresponding to the indices in Tables X and Y or something like that. > I would like to see the values between xmin and xmax, ymin and ymax. > If I uncomment the lines set_xlim and set_ylim, the axes are properly > represented, but the picture is shrinked into a corner. > How to put the good values on the axes and correct the image full > screen and correct scale ? > I think you want the extent kwarg to imshow. See http://www.scipy.org/Plotting_Tutorial for one example. ```
 Re: [Matplotlib-users] Ratio of a plot using matplotlib From: Yagua Rovi - 2010-01-14 21:11:58 ```2010/1/14 Andrew Straw : > Yagua Rovi wrote: >> I use matplotlib since two days only. I have done some things pretty >> good but I am now in front of a problem an I didn't found a solution >> in the documentation. >> >> I would like to draw the surface defined by the lists X, Y and the matrix Z. >> I get to a nice graphical output with the following code. >> My problem is that the labels on the axes indicate values >> corresponding to the indices in Tables X and Y or something like that. >> I would like to see the values between xmin and xmax, ymin and ymax. >> If I uncomment the lines set_xlim and set_ylim, the axes are properly >> represented, but the picture is shrinked into a corner. >> How to put the good  values on the axes and correct the image full >> screen and correct scale ? >> > I think you want the extent kwarg to imshow. See > http://www.scipy.org/Plotting_Tutorial for one example. > Thanks a lot Andrew, that's good. ```