Python Saving Multiple Figures into One PDF File

Python saving multiple figures into one PDF file

Use PdfPages to solve your problem. Pass your figure object to the savefig method.

For example, if you have a whole pile of figure objects open and you want to save them into a multi-page PDF, you might do:

import matplotlib.backends.backend_pdf
pdf = matplotlib.backends.backend_pdf.PdfPages("output.pdf")
for fig in xrange(1, figure().number): ## will open an empty extra figure :(
    pdf.savefig( fig )
pdf.close()

Saving multiple figures to one pdf file in matplotlib

There is an indentation error in your code. Since your plotting command was not in the loop, it will only create the last plot.

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

with PdfPages('foo.pdf') as pdf:
   for i, group in df.groupby('station_id'):
       plt.figure()
       fig=group.plot(x='year', y='Value',title=str(i)).get_figure()
       pdf.savefig(fig)

Saving multiple combined-swarm-&-box plots into one pdf file

If you would like to save them together in a panel, replace the for-loop with the following:

fig, axs = plt.subplots(len(col_ids), 1)
sns.set(style="darkgrid")

for i in range(len(col_ids)): 
    sns.boxplot(x='Groups', y=df[col_ids[i]], data=df, ax=axs[i])
    sns.swarmplot(x='Groups', y=df[col_ids[i]], data=df, color="grey", ax=axs[i])

plt.show()

After that you should be able to save them to one PDF.

Jupyter Notebook Save Multiple Plots As One PDF

For matplotlib you can create subplots inside the same figureand use plt.savefig to save as PDF or PNG. Based on this documentation you can:

import matplotlib.pyplot as plt
import numpy as np

# Some example data to display
x = np.linspace(0, 2 * np.pi, 400)
y = np.sin(x ** 2)

fig, axs = plt.subplots(2, 2, figsize=(30, 15))
axs[0, 0].plot(x, y)
axs[0, 0].set_title('Axis [0, 0]', fontsize = 20)
axs[0, 0].set_xlabel('x-label for [0,0] plot', fontsize=18)
axs[0, 0].set_ylabel('y-label for [0,0] plot', fontsize=18)

axs[0, 1].plot(-x, y, 'tab:orange')
axs[0, 1].set_title('Axis [0, 1]', fontsize = 20)
axs[1, 0].plot(x, -y, 'tab:green')
axs[1, 0].set_title('Axis [1, 0]', fontsize = 20)
axs[1, 1].plot(x, 2*y, 'tab:red')
axs[1, 1].set_title('Axis [1, 1]', fontsize = 20)

# .pdf for your case, default .png
plt.savefig(r'yourpath\fig1.pdf', bbox_inches='tight', dpi=300)

Rearrange your plots how you like and set figsize and fontsize to make the output PDF readable. Here you'd have this downloaded as single-paged PDF:

Check here for sns.subplot and use savefig again.

If you want to save figures created in different cells inside your notebook (in seperate PDF pages) try something like this:

fig1= plt.figure(...)
plt.plot(...)

fig2= plt.figure(...)
plt.plot(...)

from matplotlib.backends.backend_pdf import PdfPages
def multiple_figues(filename):
    pp = PdfPages(filename)
    fig_nums = plt.get_fignums()
    figs = [plt.figure(n) for n in fig_nums]
    for fig in figs:
        fig.savefig(pp, format='pdf')
    pp.close()

Writing multiple matplotlib figures to PDF file

All the figures are being written to the file but only the last page was being displayed. I had to use a PyPDF2 to save and display all the pages.

The implementation is below:

from PyPDF2 import PdfFileReader, PdfFileWriter

writer = PdfFileWriter()
for fig in f_list:
    decoded_data = base64.b64decode(fig)
    reader = PdfFileReader(io.BytesIO(decoded_data)) # convert the figure to a stream object
    writer.addPage(reader.getPage(0))

with open('result.pdf', 'wb') as pdf_file:
    writer.write(pdf_file)

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