How do I format axis number format to thousands with a comma in matplotlib

Question

How can I change the format of the numbers in the x-axis to be like 10 000 instead of 10000  Ideally  I would just like to do something like this   x   format  10000 21  22000 32  10120 54              Here is the code   import matplotlib pyplot as plt    create figure instance fig1   plt figure 1  fig1 set figheight 15  fig1 set figwidth 20   ax   fig1 add subplot 2 1 1   x   10000 21  22000 32  10120 54  y   1  4  15 ax plot x  y   ax2   fig1 add subplot 2 1 2   x2   10434  24444  31234 y2   1  4  9 ax2 plot x2  y2   fig1 show

User · Answer

The best way I ve found to do this is with StrMethodFormatter   import matplotlib as mpl ax yaxis set major formatter mpl ticker StrMethodFormatter   x   0f       For example   import pandas as pd import requests import matplotlib pyplot as plt import matplotlib as mpl  url    https   min-api cryptocompare com data histoday fsym BTC amp tsym USDT amp aggregate 1  df   pd DataFrame   BTC USD    d  close   for d in requests get url  json    Data       ax   df plot   ax yaxis set major formatter mpl ticker StrMethodFormatter   x   0f     plt show

User · Answer

Use   as format specifier    gt  gt  gt  format 10000 21        10 000 21    Alternatively you can also use str format instead of format    gt  gt  gt         format 10000 21   10 000 21      With matplotlib ticker FuncFormatter       ax get xaxis   set major formatter      matplotlib ticker FuncFormatter lambda x  p  format int x          ax2 get xaxis   set major formatter      matplotlib ticker FuncFormatter lambda x  p  format int x          fig1 show

User · Answer

Short answer without importing matplotlib as mpl plt gca   yaxis set major formatter plt matplotlib ticker StrMethodFormatter   x   0f      Modified from  AlexG s answer

User · Answer

I always find myself on this same page everytime I try to do this  Sure  the other answers get the job done  but aren t easy to remember for next time  ex  import ticker and use lambda  custom def  etc   Here s a simple solution if you have an axes named ax   ax set yticklabels         format int x   for x in ax get yticks   tolist

User · Answer

If you like it hacky and short you can also just update the labels  def update xlabels ax       xlabels    format label     0f   for label in ax get xticks        ax set xticklabels xlabels   update xlabels ax  update xlabels ax2

User · Answer

You can use matplotlib ticker funcformatter  import numpy as np import matplotlib pyplot as plt import matplotlib ticker as tkr   def func x  pos      formatter function takes tick label and tick position     s     d    x     groups          while s and s -1  isdigit            groups append s -3            s   s  -3      return s       join reversed groups    y format   tkr FuncFormatter func     make formatter  x   np linspace 0 10 501  y   1000000 np sin x  ax   plt subplot 111  ax plot x y  ax yaxis set major formatter y format     set formatter to needed axis  plt show

User · Answer

x    10000 21  22000 32  10120 54   Perhaps make a list  comprehension  for the labels  and then apply them  quot manually quot   xlables    f  label     for label in x  plt xticks x  xlabels

User · Answer

If you want to original values to be appear in ticks use plt xticks ticks plt xticks   0   labels plt xticks   0    This will prevent abbreviations like from 3000000 to 1 3 e5 etc  and will show 3000000  the exact value  in ticks

[python] How do I format axis number format to thousands with a comma in matplotlib?

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