Does it work for SciPy sparse matrices
> (e.g. scipy.sparse.csr_matrix)? I don't think so... That
> is why I provided my solution. Otherwise, of course, I am
> well aware of spy, spy2 
I see -- can you post a simple example (with version nums for
numpy/scipy/mpl) that exposes the bug. Hopefully there will be an
easy fix.
JDH
John Hunter wrote:
"Robert" == Robert Cimrman <cimrman3@...1098...> writes:
> Does it work for SciPy sparse matrices
> (e.g. scipy.sparse.csr_matrix)? I don't think so... That
> is why I provided my solution. Otherwise, of course, I am
> well aware of spy, spy2I see -- can you post a simple example (with version nums for
numpy/scipy/mpl) that exposes the bug. Hopefully there will be an
easy fix.
Sure:
matplotlib: 0.87.2-r2
from SVN:
numpy: Checked out revision 2433.
scipy: Checked out revision 1888.
The problem is, that you cannot use 'where' for sparse matrices yet...
In [14]:import scipy.sparse as sp
In [15]:import scipy as nm
In [16]:a = nm.array( [[1, 0, 2, 0, 3]] )
In [17]:b = sp.csr_matrix( a )
In [18]:b
Out[18]:
<1x5 sparse matrix of type '<type 'float64scalar'>'
with 3 stored elements (space for 3)
in Compressed Sparse Row format>
In [19]
b
(0, 0) 1.0
(0, 2) 2.0
(0, 4) 3.0
In [20]:spy(b )
---------------------------------------------------------------------------
exceptions.TypeError Traceback (most recent call last)
/home/eldaran/<console>
/usr/lib/python2.4/site-packages/matplotlib/pylab.py in spy(*args, **kwargs)
2184 hold(h)
2185 try:
-> 2186 ret = gca().spy(*args, **kwargs)
2187 draw_if_interactive()
2188 except:
/usr/lib/python2.4/site-packages/matplotlib/axes.py in spy(self, Z, marker, markersize, **kwargs)
3557 The line handles are returned
3558 """
-> 3559 x,y,z = matplotlib.mlab.get_xyz_where(Z, Z>0)
3560 return self.plot(x+0.5,y+0.5, linestyle='None',
3561 marker=marker,markersize=markersize, **kwargs)
/usr/lib/python2.4/site-packages/scipy/sparse/sparse.py in __cmp__(self, other)
TypeError: comparison of sparse matrices not implemented
In [23]:spy( a )
Out[23]:[<matplotlib.lines.Line2D instance at 0xb5709aac>]