Re: [Matplotlib-users] imshow for .png- low resultion

[Paul H. <pmh...@gm...>]

Olga Botnivik is doing some work with these types of figures in her fork of
the seaborn project.
Example here: http://nbviewer.ipython.org/gist/olgabot/8341784
Link to the PR in github: https://github.com/mwaskom/seaborn/pull/73

Those might be a good place to start.



On Wed, Mar 5, 2014 at 12:19 PM, Asma Riyaz <asm...@gm...> wrote:

> Hi
> I am trying to merge a heat map(matplotlib) with a tree(.png), but the
> .png does not plot as needed or for that matter cannot be seen easily. Here
> is my code:
>
> ####### CODE
>  cmap = mpl.cm.hot
>     if outlier==0:
>        threshold=1
>     else:
>        threshold=outlier-0.01
>
>     fig = plt.figure(figsize=(25,25))
>     plt.suptitle(file_handle.replace('.csv',''),fontsize=22)
>     cmap.set_over('green')
>     cmap.set_under('grey')
>     gs=gridspec.GridSpec(1, 2,height_ratios=[1,1,-2,2]
> ,width_ratios=[1,1,-2,2])
>     phyl_ax=plt.subplot(gs[0],frameon=False)
>     ht_ax=plt.subplot(gs[1])
>     ##gs.tight_layout(fig, rect=[1,1,2,2])
>     ht_ax.set_xlim(0,35)
>     ht_ax.set_ylim(0,35)
>     ##ht_ax.grid(color='white',linestyle='-',linewidth=1)
>     fig.subplots_adjust(hspace=0)
>     cb_ax,kw =mpl.colorbar.make_axes(ht_ax, shrink=0.65)
>
>
>     plt.setp(phyl_ax.get_xticklabels(),visible=False)
>     plt.setp(phyl_ax.get_yticklabels(),visible=False)
>     plt.setp(ht_ax.get_xticklabels(),visible=True)
>     plt.setp(ht_ax.get_yticklabels(),visible=True)
>     plt.setp(phyl_ax.get_xticklines(),visible=False)
>     plt.setp(phyl_ax.get_yticklines(),visible=False)
>     plt.setp(ht_ax.get_xticklines(),visible=True)
>     plt.setp(ht_ax.get_yticklines(),visible=True)
>
>
>     img = ht_ax.imshow(data, cmap=cmap,
> interpolation='none',vmax=threshold)
>     cb = mpl.colorbar.ColorbarBase(ax=cb_ax,cmap=cmap,
> extend='neither',**kw)
>     cb.cmap.set_over('green')
>     image_file =
> cbook.get_sample_data('/home/asmariyaz/Desktop/mytree.png',asfileobj=False)
>     image = plt.imread(image_file)
>
> How can I make the resolution of the .png image better OR for that matter
> is there a better solution to merge these together?
>
> I am attaching the plot I am getting with this code- (WrongTree.pdf)
>
> Thanks
> Asma
>
>
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