Re: [Matplotlib-users] Probing scalar values...
On 07/08/07, fred [EMAIL PROTECTED] wrote:
Angus McMorland a écrit :
Since all sorts of data can be displayed in am mpl window (e.g. a
plot, a contour...) you have to tell it how to access the correct
scalar value to display. You could do this with the
motion_notify_event. Register it during init, something like:
self.canvas.mpl_connect('motion_notify_event', self.mouse_move_callback)
then in mouse_move_callback:
def mouse_move_callback(self, evt):
xpos, ypos = evt.xdata, evt.ydata
val = self.data[numpy.floor(xpos), numpy.floor(ypos)]
status_str = x: %4.2f y: %4.2f I:%4.2f \
% (xpos, ypos, val)
self.SetStatusText(status_str)
where data is your image variable. This works in a wx.Frame object,
which has a SetStatusString method for displaying the values. I'm sure
you could find an equivalent in your traits app.
Thanks, I'll look at this asap (as I got other stuff on fire).
BTW, I can't ever get (in fact, I don't know how) working
the coords to be displayed in my traits app.
I guess this is more related to traits, not to mpl.
For what it's worth, mpl embedded in wx also _requires_ the use of
motion_notify_event to get co-ordinates to display. It doesn't happen
by default except in stand-alone mpl as far as I can tell.
But the mpl embedded in traits app guru is on holydays for now.
Let's wait...
Cheers,
--
http://scipy.org/FredericPetit
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[Matplotlib-users] Probing scalar values...
John Hunter a écrit : But you can just ask us -- maybe we can help. Ok. Well, running mpl examples (say image_demo.py), you can see the point coordinates under the pointer. Good point ;-) I would like to have the scalar value under the pointer to be displayed too. How could I do this ? In fact, I use mpl in a traits app, which looks like this: http://fredantispam.free.fr/mpl.png In my traits app, no point coords under pointer are displayed. Am I missing something obvious ? snippet code: da = self.display.axes self.img = da.imshow(self.current_data.array, vmin=self.vmin, vmax=self.vmax, cmap=self.cmap, interpolation=self.interpolate_colormap_method, extent=extent, origin=self.origin, alpha=self.opacity) self.display.figure.canvas.draw() TIA. Cheers, -- http://scipy.org/FredericPetit - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Probing scalar values...
Hi fred,
On 04/08/07, fred [EMAIL PROTECTED] wrote:
Well, running mpl examples (say image_demo.py),
you can see the point coordinates under the pointer.
Good point ;-)
I would like to have the scalar value under the pointer to be displayed
too.
How could I do this ?
Since all sorts of data can be displayed in am mpl window (e.g. a
plot, a contour...) you have to tell it how to access the correct
scalar value to display. You could do this with the
motion_notify_event. Register it during init, something like:
self.canvas.mpl_connect('motion_notify_event', self.mouse_move_callback)
then in mouse_move_callback:
def mouse_move_callback(self, evt):
xpos, ypos = evt.xdata, evt.ydata
val = self.data[numpy.floor(xpos), numpy.floor(ypos)]
status_str = x: %4.2f y: %4.2f I:%4.2f \
% (xpos, ypos, val)
self.SetStatusText(status_str)
where data is your image variable. This works in a wx.Frame object,
which has a SetStatusString method for displaying the values. I'm sure
you could find an equivalent in your traits app.
Hope that helps,
Gus.
--
AJC McMorland, PhD Student
Physiology, University of Auckland
-
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