如何在python中使用pdfpages生成垂直PDF

Question

I am using from matplotlib.backends.backend_pdf import PdfPages to generate PDFs containing multiple (sub)plots.

Is there a way to control the orientation (horizontal/vertical) of the resulting pdf? I constantly get horizontal PDF's

thanks

Answer 1

If you set the size of your figure using the set_size_inches function, the PDF should automatically be the shape you want:

from matplotlib.backends.backend_pdf import PdfPages
import matplotlib.pyplot as plt

with PdfPages('portrait.pdf') as pdf:
    x = range(10)
    y = [y * 2 for y in x]

    plt.figure()
    plt.clf()
    plt.plot(x, y)
    plt.xlabel('x axis')
    plt.ylabel('y axis')
    figure = plt.gcf()
    figure.set_size_inches([7,10])
    pdf.savefig(figure)

If you change the size to [10,7] , you should see the orientation automatically switch.

savefig does have an orientation setting, eg orientation='portrait' but I don't think this will have any effect. You could try it though.

Answer 2

The following worked for me:

with PdfPages('portrait.pdf') as pdf:
     pdf.savefig(fig, orientation='portrait')
     plt.close()