How do I draw a grid onto a plot in Python

Question

I just finished writing code to make a plot using pylab in Python and now I would like to superimpose a grid of 10x10 onto the scatter plot  How do I do that   My current code is the following   x   numpy arange 0  1  0 05  y   numpy power x  2   fig   plt figure   ax   fig gca   ax set xticks numpy arange 0  1  0 1   ax set yticks numpy arange 0  1   0 1   plt scatter x  y  plt show     And its output is     What I would like is the following output     EDIT  Added an exemple  based on Andrey Sobolev s answer

User · Answer

The pylab examples page is a very useful source. The example relevant for your question:

http://matplotlib.sourceforge.net/mpl_examples/pylab_examples/scatter_demo2.py http://matplotlib.sourceforge.net/users/screenshots.html#scatter-demo

User · Answer

Using rcParams you can show grid very easily as follows  plt rcParams  axes facecolor      white  plt rcParams  axes edgecolor      white  plt rcParams  axes grid     True plt rcParams  grid alpha     1 plt rcParams  grid color       cccccc    If grid is not showing even after changing these parameters then use  plt grid True    before calling  plt show

User · Answer

Here is a small example how to add a matplotlib grid in Gtk3 with Python 2  not working in Python 3       usr bin env python  - - coding  utf-8 - -  import gi gi require version  Gtk    3 0   from gi repository import Gtk from matplotlib figure import Figure from matplotlib backends backend gtk3agg import FigureCanvasGTK3Agg as FigureCanvas  win   Gtk Window   win connect  delete-event   Gtk main quit  win set title  Embedding in GTK3    f   Figure figsize  1  1   dpi 100  ax   f add subplot 111  ax grid    canvas   FigureCanvas f  canvas set size request 400  400  win add canvas   win show all   Gtk main

User · Answer

To show a grid line on every tick  add   plt grid True    For example   import matplotlib pyplot as plt  points          0  10        10  20        20  40        60  100      x   list map lambda x  x 0   points   y   list map lambda x  x 1   points    plt scatter x  y  plt grid True   plt show         In addition  you might want to customize the styling  e g  solid line instead of dashed line   add   plt rc  grid   linestyle  -   color  black     For example   import matplotlib pyplot as plt  points          0  10        10  20        20  40        60  100      x   list map lambda x  x 0   points   y   list map lambda x  x 1   points    plt rc  grid   linestyle  -   color  black   plt scatter x  y  plt grid True   plt show

User · Answer

You want to use pyplot grid   x   numpy arange 0  1  0 05  y   numpy power x  2   fig   plt figure   ax   fig gca   ax set xticks numpy arange 0  1  0 1   ax set yticks numpy arange 0  1   0 1   plt scatter x  y  plt grid   plt show     ax xaxis grid and ax yaxis grid can control grid lines properties

[python] How do I draw a grid onto a plot in Python?

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