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

[Asma R. <asm...@gm...>]

I am sorry but I don't understand the meaning of anti-aliasing? Do you mean
on this line
---->fig.savefig('/home/asmariyaz/Desktop/heatmap/'+file_handle+'.pdf',bbox_inches='tight',dpi=100),
where I am giving it a new path+name? I made the following changes:
aspect='auto', interpolation='none' and I have attached the result


On Wed, Mar 5, 2014 at 4:49 PM, Eric Firing <ef...@ha...> wrote:

> On 2014/03/05 11:37 AM, Asma Riyaz wrote:
> >   Sorry I somehow forgot to paste the imshow call to plot the .png
> > image(pasted the entire code again), I am trying the different
> > interpolation parameters in the mean time as suggested by Pierre
> >
> > data=np.array(full_len)
> >      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])
> >      gs.tight_layout(fig,)
> >      phyl_ax=plt.subplot(gs[0]) ##,frameon=False)##
> >      ht_ax=plt.subplot(gs[1],sharey=phyl_ax)
> >      ##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)
> >      img= mpimg.imread('/home/asmariyaz/Desktop/mytree.png')
> >      phyl_ax.imshow(img,interpolation='nearest')
> >
> >
> heatmap_file=fig.savefig('/home/asmariyaz/Desktop/heatmap/'+file_handle+'.pdf',bbox_inches='tight')
>
> Try giving savefig a dpi kwarg to increase the resolution with which the
> image is saved in the pdf?  Turn off anti-aliasing when you make the png?
>
> Eric
>
>
>
>
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