How to add title to subplots in Matplotlib

Question

I have one figure which contains many subplots   fig   plt figure num None  figsize  26  12   dpi 80  facecolor  w   edgecolor  k   fig canvas set window title  Window Title      Returns the Axes instance ax   fig add subplot 311   ax2   fig add subplot 312   ax3   fig add subplot 313     How do I add titles to the subplots   fig suptitle adds a title to all graphs and although ax set title   exists  the latter does not add any title to my subplots    Thank you for your help   Edit  Corrected typo about set title    Thanks Rutger Kassies

User · Accepted Answer

ax title set text  My Plot Title   seems to work too   fig   plt figure   ax1   fig add subplot 221  ax2   fig add subplot 222  ax3   fig add subplot 223  ax4   fig add subplot 224  ax1 title set text  First Plot   ax2 title set text  Second Plot   ax3 title set text  Third Plot   ax4 title set text  Fourth Plot   plt show

User · Answer

ax set title   should set the titles for separate subplots   import matplotlib pyplot as plt  if   name         main         data    1  2  3  4  5       fig   plt figure       fig suptitle  Title for whole figure   fontsize 16      ax   plt subplot  211       ax set title  Title for first plot       ax plot data       ax   plt subplot  212       ax set title  Title for second plot       ax plot data       plt show     Can you check if this code works for you  Maybe something overwrites them later

User · Answer

A shorthand answer assuming  import matplotlib pyplot as plt   plt gca   set title  title     as in   plt subplot 221  plt gca   set title  title   plt subplot 222  etc      Then there is no need for superfluous variables

User · Answer

A solution I tend to use more and more is this one   import matplotlib pyplot as plt  fig  axs   plt subplots 2  2     1 for i  ax in enumerate axs ravel       2     ax set title  Plot      format i     3    Create your arbitrary number of axes axs ravel   converts your 2-dim object to a 1-dim vector in row-major style assigns the title to the current axis-object

User · Answer

In case you have multiple images and you want to loop though them and show them 1 by 1 along with titles - this is what you can do  No need to explicitly define ax1  ax2  etc     The catch is you can define dynamic axes ax  as in Line 1 of code and you can set its title inside a loop  The rows of 2D array is length  len  of axis ax  Each row has 2 items i e  It is list within a list  Point No 2  set title can be used to set title  once the proper axes ax  or subplot is selected     import matplotlib pyplot as plt     fig  ax   plt subplots 2  2  figsize  6  8     for i in range len ax         for j in range len ax i                ax i j  imshow test images gr 0  reshape 28 28           ax i j  set title  Title-    str i    str j

User · Answer

fig   ax1  ax2  ax3  ax4    plt subplots nrows 1  ncols 4 figsize  11  7    grid   plt GridSpec 2  2  wspace 0 2  hspace 0 5   ax1   plt subplot grid 0  0   ax2   plt subplot grid 0  1    ax3   plt subplot grid 1   1   ax4   plt subplot grid 1  1     ax1 title set text  First Plot   ax2 title set text  Second Plot   ax3 title set text  Third Plot   ax4 title set text  Fourth Plot    plt show

User · Answer

If you want to make it shorter  you could write     import matplolib pyplot as plt for i in range 4       plt subplot 2 2 i 1  set title  Subplot n       format i 1   plt show     It makes it maybe less clear but you don t need more lines or variables

[python] How to add title to subplots in Matplotlib?

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