matplotlib-users Mailing List for matplotlib (Page 2)

On Tue, Feb 23, 2010 at 6:45 PM, David Goldsmith
<d_l...@ya...> wrote:
> 1) why doesn't this:
>
>>>> for cmap in dir(cm):
>>>>    try:
>>>>        ax.imshow(image, cmap)
>>>>        canvas.print_figure('image_'+cmap)
>>>>    except:
>>>>        pass
>
> "work" (i.e., simply bypass those elements of dir(cm) which cause imshow to raise an exception, but then continue on as if nothing had happened)?  Is this a bug?
>

I believe this happens because you never clear your figure (or axes)
between print_figure.
imshow does not erase an existing image and you end up with bunch of
images overlapped.
And the exceptions are keep being raised as the image you created with
cmap="LUTSIZE" is still there.

calling ax.cla() before ax.imshow works for me.

Regards,

-JJ

On Wed, Feb 24, 2010 at 3:06 AM, Matthias Michler
<Mat...@gm...> wrote:
> some time ago somebody proposed an example on the list to circle through all
> possible colormaps. In this time cm had an attribute "cm.cmapnames", which
> hold all these names, but nowerdays (svn-HEAD) this attribute has be removed
> and in my opinion 'cm.cmap_d.keys()' is an appropriate replacement for this.
>

The names are available as "cm._cmapnames". However, this list does
not include any reverse map names (i.e., names like "jet_r").
So, yes, you should use cmap_d instead.

Regards,

-JJ

This looks correct. I went and look at the animation examples and they do
something similar.

Thx

---------- Forwarded message ----------
From: Stephen George <ste...@op...>
Date: Tue, Feb 23, 2010 at 6:28 PM
Subject: Re: [Matplotlib-users] hoe to update a plot
To: Matplotlib Users <mat...@li...>


C M wrote:
> On Tue, Feb 23, 2010 at 7:00 PM, Mathew Yeates <mat...@gm...>
wrote:
>
>> Hi
>> I am using gtk and displaying a plot in a FigureCanvas. In response to an
>> event, I want to update the plot with new data.
>>
>> e.g.
>> self.fig = Figure(figsize=(5,5), dpi=100)
>> self.ax = fig.add_subplot(111)
>> ax.plot(data[0,0:,0],
>>
>>
>>
>> canvas = FigureCanvas(fig)
>> canvas.set_size_request(500,500)
>>
>> def on_some_signal(self,widget):
>>     ?????
>>
>
>
I also may be wrong.

I thought ax.plot(..) would redraw everything (ticks, labels, etc)  to
do with the plot.

I've been using set_data as I thought it was meant to be quicker.
               self.cline[0].set_data(rX, myabs) # I have to make sure
I use correct line
                        ::          ::
               self.canvas.draw()

To just change the data associated with a specific line on plot.

I stored the lines on my graph in a list called cline,  I captured the
line at time of creating of the plot
               r = self.axis.plot( rX, myabs ,self.linestyle, color='b')
               self.cline.append( r[0] )


- Steve




------------------------------------------------------------------------------
Download Intel&#174; Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
_______________________________________________
Matplotlib-users mailing list
Mat...@li...
https://lists.sourceforge.net/lists/listinfo/matplotlib-users


On Tue, Feb 23, 2010 at 6:28 PM, Stephen George
<ste...@op...>wrote:

> C M wrote:
> > On Tue, Feb 23, 2010 at 7:00 PM, Mathew Yeates <mat...@gm...>
> wrote:
> >
> >> Hi
> >> I am using gtk and displaying a plot in a FigureCanvas. In response to
> an
> >> event, I want to update the plot with new data.
> >>
> >> e.g.
> >> self.fig = Figure(figsize=(5,5), dpi=100)
> >> self.ax = fig.add_subplot(111)
> >> ax.plot(data[0,0:,0],
> >>
> >>
> >>
> >> canvas = FigureCanvas(fig)
> >> canvas.set_size_request(500,500)
> >>
> >> def on_some_signal(self,widget):
> >>     ?????
> >>
> >>
> I also may be wrong.
>
> I thought ax.plot(..) would redraw everything (ticks, labels, etc)  to
> do with the plot.
>
> I've been using set_data as I thought it was meant to be quicker.
>                self.cline[0].set_data(rX, myabs) # I have to make sure
> I use correct line
>                         ::          ::
>                self.canvas.draw()
>
> To just change the data associated with a specific line on plot.
>
> I stored the lines on my graph in a list called cline,  I captured the
> line at time of creating of the plot
>                r = self.axis.plot( rX, myabs ,self.linestyle, color='b')
>                self.cline.append( r[0] )
>
>
> - Steve
>
>
>
>
>
> ------------------------------------------------------------------------------
> Download Intel&#174; Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

C M wrote:
> On Tue, Feb 23, 2010 at 7:00 PM, Mathew Yeates <mat...@gm...> wrote:
>   
>> Hi
>> I am using gtk and displaying a plot in a FigureCanvas. In response to an
>> event, I want to update the plot with new data.
>>
>> e.g.
>> self.fig = Figure(figsize=(5,5), dpi=100)
>> self.ax = fig.add_subplot(111)
>> ax.plot(data[0,0:,0],
>>
>>
>>
>> canvas = FigureCanvas(fig)
>> canvas.set_size_request(500,500)
>>
>> def on_some_signal(self,widget):
>>     ?????
>>
>>
>> I've tried a number of different things. How do you do this?
>>     
>
> I may be wrong here, but isn't it:
>
> def on_some_signal(self,widget):
>     ax.plot(yournewdata)
>     canvas.draw()
>
> Che
>
>   
I also may be wrong.

I thought ax.plot(..) would redraw everything (ticks, labels, etc)  to 
do with the plot.

I've been using set_data as I thought it was meant to be quicker.
                self.cline[0].set_data(rX, myabs) # I have to make sure 
I use correct line
                         ::          ::
                self.canvas.draw()

To just change the data associated with a specific line on plot.

I stored the lines on my graph in a list called cline,  I captured the 
line at time of creating of the plot
                r = self.axis.plot( rX, myabs ,self.linestyle, color='b')
                self.cline.append( r[0] )


- Steve

On Tue, Feb 23, 2010 at 7:00 PM, Mathew Yeates <mat...@gm...> wrote:
> Hi
> I am using gtk and displaying a plot in a FigureCanvas. In response to an
> event, I want to update the plot with new data.
>
> e.g.
> self.fig = Figure(figsize=(5,5), dpi=100)
> self.ax = fig.add_subplot(111)
> ax.plot(data[0,0:,0],
>
>
>
> canvas = FigureCanvas(fig)
> canvas.set_size_request(500,500)
>
> def on_some_signal(self,widget):
>     ?????
>
>
> I've tried a number of different things. How do you do this?

I may be wrong here, but isn't it:

def on_some_signal(self,widget):
    ax.plot(yournewdata)
    canvas.draw()

Che

Hi
I am using gtk and displaying a plot in a FigureCanvas. In response to an
event, I want to update the plot with new data.

e.g.
self.fig = Figure(figsize=(5,5), dpi=100)
self.ax = fig.add_subplot(111)
ax.plot(data[0,0:,0],



canvas = FigureCanvas(fig)
canvas.set_size_request(500,500)

def on_some_signal(self,widget):
    ?????


I've tried a number of different things. How do you do this?

Mathew