Re: [Matplotlib-users] Adjusting Image size
On 9/10/2010 5:27 AM, Nils Wagner wrote: what is needed to save a figure when the size is given in pixels, i.e. 1024x772 ? The default is 800x600 pixels. Did you already get an answer? My understanding is that you set the figure size in *inches*, and then by setting its ``dpi`` you determine the number of pixels. (So inches are purely virtual, unless you match the ppi of your display/printer.) hth, Alan Isaac -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing http://p.sf.net/sfu/novell-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Adjusting Image size
Hi all, what is needed to save a figure when the size is given in pixels, i.e. 1024x772 ? The default is 800x600 pixels. from pylab import plot, savefig from numpy import sin,linspace,pi x = linspace(0,2*pi,200) plot(x,sin(x)) savefig('test') Nils -- Automate Storage Tiering Simply Optimize IT performance and efficiency through flexible, powerful, automated storage tiering capabilities. View this brief to learn how you can reduce costs and improve performance. http://p.sf.net/sfu/dell-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Adjusting Image size
On Sep 10, 2010, at 5:27 AM, Nils Wagner wrote: Hi all, what is needed to save a figure when the size is given in pixels, i.e. 1024x772 ? The default is 800x600 pixels. from pylab import plot, savefig from numpy import sin,linspace,pi x = linspace(0,2*pi,200) plot(x,sin(x)) savefig('test') Nils You can try creating a figure with the correct aspect ratio and then setting a corresponding dpi when you save: #--- import matplotlib.pyplot as plt import numpy as np plt.figure(figsize=(10.24, 7.72)) x = np.linspace(0,2*np.pi,200) plt.plot(x, np.sin(x)) plt.savefig('test', dpi=100) #--- I had mixed results with this: I would occasionally get figures that were one pixel smaller than desired. Best, -Tony -- Automate Storage Tiering Simply Optimize IT performance and efficiency through flexible, powerful, automated storage tiering capabilities. View this brief to learn how you can reduce costs and improve performance. http://p.sf.net/sfu/dell-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Adjusting Image size
On Fri, Sep 10, 2010 at 4:27 AM, Nils Wagner nwag...@iam.uni-stuttgart.dewrote: Hi all, what is needed to save a figure when the size is given in pixels, i.e. 1024x772 ? The default is 800x600 pixels. from pylab import plot, savefig from numpy import sin,linspace,pi x = linspace(0,2*pi,200) plot(x,sin(x)) savefig('test') Nils Nils, In matplotlib, you can specify a figure size in inches like so: import matplotlib.pyplot as plt from numpy import sin,linspace,pi width_in = 10.0 width_px = 1024 height_px = 772 aspect = width_px / float(height_px) height_in = width_in / aspect dpi = width_px / width_in x = linspace(0, 2*pi, 200) fig = plt.figure(figsize=(width_in, height_in)) ax = fig.gca() ax.plot(x, sin(x)) Then, when you save your figure, you can specify the dots per inch (dpi): fig.savefig('test.png', dpi=dpi) I hope this helps! Ben Root -- Automate Storage Tiering Simply Optimize IT performance and efficiency through flexible, powerful, automated storage tiering capabilities. View this brief to learn how you can reduce costs and improve performance. http://p.sf.net/sfu/dell-sfdev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users