Shrividya Ravi wrote:
> Hi all,
> I have been using contourf quite happily with a square number of grid
> points. e.g. a 20 by 20 grid. I recently decided to do a contourf plot
> of a 20 by 15 grid (300 points) and I get errors. Unfortunately, I am
> plotting experimental data so I cannot really tailor the grid size.
> Here is the error message ipython generates:
>
> *pylab.contourf((map_XX,map_YY,y))
It looks like the problem is that you have an extra set of parentheses,
so that you are giving contourf a single argument--a tuple--instead of
the three arguments that you intend. Contour and contourf have no
problem with rectangular grids.
Eric
> *
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call last)
>
> /media/ANAMIKA/crashing out
> Raman/script_7-03-10_co1_G-mode_spatial_map.py in <module>()
> ----> 1
> 2
> 3
> 4
> 5
>
> /usr/lib/pymodules/python2.6/matplotlib/pyplot.pyc in contourf(*args,
> **kwargs)
> 1874 ax.hold(hold)
> 1875 try:
> -> 1876 ret = ax.contourf(*args, **kwargs)
> 1877 draw_if_interactive()
> 1878 finally:
>
> /usr/lib/pymodules/python2.6/matplotlib/axes.pyc in contourf(self,
> *args, **kwargs)
> 6816 if not self._hold: self.cla()
> 6817 kwargs['filled'] = True
> -> 6818 return mcontour.ContourSet(self, *args, **kwargs)
> 6819 contourf.__doc__ = mcontour.ContourSet.contour_doc
> 6820
>
> /usr/lib/pymodules/python2.6/matplotlib/contour.pyc in __init__(self,
> ax, *args, **kwargs)
> 572 raise ValueError('Either colors or cmap must be None')
> 573 if self.origin == 'image': self.origin =
> mpl.rcParams['image.origin']
> --> 574 x, y, z = self._contour_args(*args) # also sets
> self.levels,
> 575 # self.layers
>
> 576 if self.colors is not None:
>
> /usr/lib/pymodules/python2.6/matplotlib/contour.pyc in
> _contour_args(self, *args)
> 759 if Nargs <= 2:
> 760 z = ma.asarray(args[0], dtype=np.float64)
> --> 761 x, y = self._initialize_x_y(z)
> 762 elif Nargs <=4:
> 763 x,y,z = self._check_xyz(args[:3])
>
> /usr/lib/pymodules/python2.6/matplotlib/contour.pyc in
> _initialize_x_y(self, z)
> 696 '''
> 697 if z.ndim != 2:
> --> 698 raise TypeError("Input must be a 2D array.")
> 699 else:
> 700 Ny, Nx = z.shape
>
> TypeError: Input must be a 2D array.
>
> If anyone has a solution, please do let me know!
> Many thanks!
>
>
>
>
> ------------------------------------------------------------------------
>
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