## Re: [Matplotlib-users] Maintain A4 plot size with arbitrary number of subplots

 Re: [Matplotlib-users] Maintain A4 plot size with arbitrary number of subplots From: Mogliii - 2012-06-25 18:09:22 ```On 25/06/12 18:30, Benjamin Root wrote: > > > > Your call to "plt.subplots" is creating a new figure object, which > never gets the figsize parameter (only the old figure object has that > set). > > Cheers! > Ben Root > Hi, indeed you are right. I added "f.set_size_inches(fig_size)" and it works Also I had a wrong conversion of inch to cm (2.58 before). Thank you for your help, Mogliii The final code: ################# import matplotlib.pyplot as plt from matplotlib.backends.backend_pdf import PdfPages import numpy as np x = np.arange(10) y = np.arange(10) fig_width_cm = 21 # A4 page fig_height_cm = 29.7 inches_per_cm = 1 / 2.54 # Convert cm to inches fig_width = fig_width_cm * inches_per_cm # width in inches fig_height = fig_height_cm * inches_per_cm # height in inches fig_size = [fig_width, fig_height] pdf = PdfPages('outfile.pdf') allplots = 3 # This is the variable number of subplots f, axarr = plt.subplots(allplots, 1) f.set_size_inches(fig_size) for plot in range(allplots): axarr[plot].plot(x + plot, y) pdf.savefig() pdf.close() ```

 [Matplotlib-users] Maintain A4 plot size with arbitrary number of subplots From: mogliii - 2012-06-25 17:12:20 ```Hi, In my script a variable number of graphs is generated. I want to place them in one column with arbitrary number of rows onto an A4 canvas (for pdf export). Unfortunately the figsize directive seems to have no effect. The figure is always 8x6 inch. Which code do I have to use in this case? My minimal code: ####################################### import matplotlib.pyplot as plt from matplotlib.backends.backend_pdf import PdfPages import numpy as np x = np.arange(10) y = np.arange(10) fig_width_cm = 21 # A4 page fig_height_cm = 29.7 inches_per_cm = 1 / 2.58 # Convert cm to inches fig_width = fig_width_cm * inches_per_cm # width in inches fig_height = fig_height_cm * inches_per_cm # height in inches fig_size = [fig_width, fig_height] pdf = PdfPages('outfile.pdf') fig = plt.figure(figsize = fig_size) allplots = 3 # This is the variable number of subplots f, axarr = plt.subplots(allplots, 1) for plot in range(allplots): axarr[plot].plot(x+plot, y) pdf.savefig() pdf.close() ```
 Re: [Matplotlib-users] Maintain A4 plot size with arbitrary number of subplots From: Benjamin Root - 2012-06-25 17:31:19 Attachments: Message as HTML ```On Mon, Jun 25, 2012 at 1:12 PM, mogliii wrote: > Hi, > > In my script a variable number of graphs is generated. I want to place > them in one column with arbitrary number of rows onto an A4 canvas (for > pdf export). > > Unfortunately the figsize directive seems to have no effect. The figure > is always 8x6 inch. > > Which code do I have to use in this case? > > > My minimal code: > ####################################### > > import matplotlib.pyplot as plt > from matplotlib.backends.backend_pdf import PdfPages > import numpy as np > > x = np.arange(10) > y = np.arange(10) > > fig_width_cm = 21 # A4 page > fig_height_cm = 29.7 > inches_per_cm = 1 / 2.58 # Convert cm to inches > fig_width = fig_width_cm * inches_per_cm # width in inches > fig_height = fig_height_cm * inches_per_cm # height in inches > fig_size = [fig_width, fig_height] > > > pdf = PdfPages('outfile.pdf') > fig = plt.figure(figsize = fig_size) > allplots = 3 # This is the variable number of subplots > f, axarr = plt.subplots(allplots, 1) > > > for plot in range(allplots): > axarr[plot].plot(x+plot, y) > > pdf.savefig() > pdf.close() > > Your call to "plt.subplots" is creating a new figure object, which never gets the figsize parameter (only the old figure object has that set). Cheers! Ben Root ```
 Re: [Matplotlib-users] Maintain A4 plot size with arbitrary number of subplots From: Mogliii - 2012-06-25 18:09:22 ```On 25/06/12 18:30, Benjamin Root wrote: > > > > Your call to "plt.subplots" is creating a new figure object, which > never gets the figsize parameter (only the old figure object has that > set). > > Cheers! > Ben Root > Hi, indeed you are right. I added "f.set_size_inches(fig_size)" and it works Also I had a wrong conversion of inch to cm (2.58 before). Thank you for your help, Mogliii The final code: ################# import matplotlib.pyplot as plt from matplotlib.backends.backend_pdf import PdfPages import numpy as np x = np.arange(10) y = np.arange(10) fig_width_cm = 21 # A4 page fig_height_cm = 29.7 inches_per_cm = 1 / 2.54 # Convert cm to inches fig_width = fig_width_cm * inches_per_cm # width in inches fig_height = fig_height_cm * inches_per_cm # height in inches fig_size = [fig_width, fig_height] pdf = PdfPages('outfile.pdf') allplots = 3 # This is the variable number of subplots f, axarr = plt.subplots(allplots, 1) f.set_size_inches(fig_size) for plot in range(allplots): axarr[plot].plot(x + plot, y) pdf.savefig() pdf.close() ```
 Re: [Matplotlib-users] Maintain A4 plot size with arbitrary number of subplots From: Mogliii - 2012-06-25 20:07:45 ```Even better: f, axarr = plt.subplots(allplots, 1, figsize = fig_size) Its always difficult to predict which **kwargs could/would be valid... ```