matplotlib-users Mailing List for matplotlib

>>>>> "Malte" == Malte Marquarding <Mal...@cs...> writes:

    Malte> Hi, is it possible to only autoscale on one axis.  I'd like
    Malte> to set the xlimits but have the ylimits autoscaled.

Any problem with?

  plot(something)  # y and y are autoscaled
  xlim(0,2)        # set your own xlim

JDH

>>>>> "Darren" == Darren Dale <dd...@co...> writes:

    Darren> I like the new matshow function. Is it possible to update
    Darren> the data? I was looking for the equivalent of an imshow
    Darren> object's set_data method, but it is not exposed to
    Darren> matshow.

matshow returns the image object, so you should be able to call
set_data on this instance.  Of course, the new array needs to have the
same aspect ratio as the original if you want the aspect preserving
features of matshow.

    Darren> This is a nice function for plotting microscopy images,
    Darren> since the aspect ratio is fixed. Is there any object to
    Darren> allowing the origin kwarg to do reorient the origin of the
    Darren> image?  --

I don't think so.  Take a look at the implementation of matshow in
pylab.py.  It is broken into two pieces.  The hard part is being done
in matplotlib.figure.figaspect, which creates the figure with the
right aspect ratio -- as long as you create an axes with equal width
and height, your axes will have the right aspect too.

You can use this figaspect yourself, and then simply call imshow with
the args you want.

  from matplotlib.figure import figaspect
  w,h = figaspect(arr)
  fig = figure(figsize=(w,h))
  ax  = fig.add_axes([0.15, 0.09, 0.775, 0.775])
  ax.imshow(arr, origin='upper', interpolation='nearest')

JDH

>>>>> "Darren" == Darren Dale <dd...@co...> writes:


    Darren> I am using ipython -pylab, and can reproduce this error
    Darren> with the following unusual steps:

Thanks Darren,

I think the easiest thing to do here is raise on the call to
set_position if w==0 or h ==0

JDH

I am using ipython -pylab, and can reproduce this error with the following 
unusual steps:

a=rand(500,500)
figimage(a)
ax=gca()
ax.set_position([0,1,0,1]) # this is should be [0,0,1,1]
draw()
# traceback here, thats expected...
# fix my mistake
ax.set_position([0,0,1,1])
# now moving the mouse pointer over the image causes the crash report to be 
generated.

The first call to set_position I got the order confused with imshow's extent, 
which is [xmin,xmax,ymin,ymax] instead of the usual [xmin,ymin,dx,dy]. Like I 
said, its a bizarre set of circumstances, but I thought I should report it.

-- 

Darren

I like the new matshow function. Is it possible to update the data? I was 
looking for the equivalent of an imshow object's set_data method, but it is 
not exposed to matshow.

This is a nice function for plotting microscopy images, since the aspect ratio 
is fixed. Is there any object to allowing the origin kwarg to do reorient the 
origin of the image?
-- 

Darren

Hi,

is it possible to only autoscale on one axis.
I'd like to set the xlimits but have the ylimits autoscaled.

Cheers,
Malte.

If one reads the docs (Goals) one finds the answer
"Yet to be added is a blocking function, like x, y = mouse_press(*args) "


Cheers,
Malte.