How to remove gaps between subplots in matplotlib

Question

The code below produces gaps between the subplots   How do I remove the gaps between the subplots and make the image a tight grid     import matplotlib pyplot as plt  for i in range 16       i   i   1     ax1   plt subplot 4  4  i      plt axis  on       ax1 set xticklabels         ax1 set yticklabels         ax1 set aspect  equal       plt subplots adjust wspace None  hspace None  plt show

User · Answer

Another method is to use the pad keyword from plt subplots adjust    which also accepts negative values  import matplotlib pyplot as plt  ax    plt subplot 2 2 i 1  for i in range 4    for a in ax      a set xticklabels         a set yticklabels      plt subplots adjust pad -5 0   Additionally  to remove the white at the outer fringe of all subplots  i e  the canvas   always save with plt savefig fname  bbox inches  quot tight quot

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You can use gridspec to control the spacing between axes  There s more information here    import matplotlib pyplot as plt import matplotlib gridspec as gridspec  plt figure figsize    4 4   gs1   gridspec GridSpec 4  4  gs1 update wspace 0 025  hspace 0 05    set the spacing between axes    for i in range 16        i   i   1   grid spec indexes from 0     ax1   plt subplot gs1 i       plt axis  on       ax1 set xticklabels         ax1 set yticklabels         ax1 set aspect  equal    plt show

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Have you tried plt tight layout     with plt tight layout    without it    Or  something like this  use add axes   left  0 1 0 3 0 5 0 7  width  0 2 0 2  0 2  0 2  rectLS    for x in left     for y in left         rectLS append  x  y  0 2  0 2   axLS    fig plt figure   axLS append fig add axes rectLS 0    for i in  1 2 3        axLS append fig add axes rectLS i  sharey axLS -1        axLS append fig add axes rectLS 4    for i in  1 2 3        axLS append fig add axes rectLS i 4  sharex axLS i  sharey axLS -1    axLS append fig add axes rectLS 8    for i in  5 6 7        axLS append fig add axes rectLS i 4  sharex axLS i  sharey axLS -1         axLS append fig add axes rectLS 12    for i in  9 10 11        axLS append fig add axes rectLS i 4  sharex axLS i  sharey axLS -1      If you don t need to share axes  then simply axLS map fig add axes  rectLS

User · Answer

With recent matplotlib versions you might want to try Constrained Layout  This does not work with plt subplot   however  so you need to use plt subplots   instead   fig  axs   plt subplots 4  4  constrained layout True

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Without resorting gridspec entirely  the following might also be used to remove the gaps by setting wspace and hspace to zero   import matplotlib pyplot as plt  plt clf   f  axarr   plt subplots 4  4  gridspec kw     wspace  0   hspace  0    for i  ax in enumerate f axes       ax grid  on   linestyle  --       ax set xticklabels         ax set yticklabels      plt show   plt close     Resulting in

User · Answer

The problem is the use of aspect  equal   which prevents the subplots from stretching to an arbitrary aspect ratio and filling up all the empty space   Normally  this would work   import matplotlib pyplot as plt  ax    plt subplot 2 2 i 1  for i in range 4    for a in ax      a set xticklabels         a set yticklabels      plt subplots adjust wspace 0  hspace 0    The result is this     However  with aspect  equal   as in the following code   import matplotlib pyplot as plt  ax    plt subplot 2 2 i 1  for i in range 4    for a in ax      a set xticklabels         a set yticklabels         a set aspect  equal    plt subplots adjust wspace 0  hspace 0    This is what we get     The difference in this second case is that you ve forced the x- and y-axes to have the same number of units pixel  Since the axes go from 0 to 1 by default  i e   before you plot anything   using aspect  equal  forces each axis to be a square  Since the figure is not a square  pyplot adds in extra spacing between the axes horizontally   To get around this problem  you can set your figure to have the correct aspect ratio  We re going to use the object-oriented pyplot interface here  which I consider to be superior in general   import matplotlib pyplot as plt  fig   plt figure figsize  8 8     Notice the equal aspect ratio ax    fig add subplot 2 2 i 1  for i in range 4    for a in ax      a set xticklabels         a set yticklabels         a set aspect  equal    fig subplots adjust wspace 0  hspace 0    Here s the result

[python] How to remove gaps between subplots in matplotlib?

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