Getting vertical gridlines to appear in line plot in matplotlib

Question

I want to get both horizontal and vertical grid lines on my plot but only the horizontal grid lines are appearing by default  I am using a pandas DataFrame from an sql query in python to generate a line plot with dates on the x-axis  I m not sure why they do not appear on the dates and I have tried to search for an answer to this but couldn t find one   All I have used to plot the graph is the simple code below    data plot   grid  on     data is the DataFrame which contains the dates and the data from the sql query    I have also tried adding the code below but I still get the same output with no vertical grid lines   ax   plt axes           ax yaxis grid     horizontal lines ax xaxis grid     vertical lines   Any suggestions

User · Answer

maybe this can solve the problem  matplotlib  define size of a grid on a plot  ax grid True  which  both     The truth is that the grid is working  but there s only one v-grid in 00 00 and no grid in others  I meet the same problem that there s only one grid in Nov 1 among many days

User · Answer

For only horizontal lines  ax   plt axes           ax yaxis grid     horizontal lines   This worked

User · Answer

According to matplotlib documentation  The signature of the Axes class grid   method is as follows      Axes grid b None  which  major   axis  both     kwargs    Turn the axes grids on or off         which can be    major     default      minor     or    both    to control whether   major tick grids  minor tick grids  or both are affected       axis can be    both     default      x     or    y    to control which set of   gridlines are drawn    So in order to show grid lines for both the x axis and y axis  we can use the the following code   ax   plt gca   ax grid which  major   axis  both   linestyle  --     This method gives us finer control over what to show for grid lines

User · Answer

plt gca   xaxis grid True  proved to be the solution for me

User · Answer

You may need to give boolean arg in your calls  e g  use ax yaxis grid True  instead of ax yaxis grid     Additionally  since you are using both of them you can combine into ax grid  which works on both  rather than doing it once for each dimension   ax   plt gca   ax grid True    That should sort you out

User · Answer

Short answer  read below for more info    ax grid axis  both   which  both       What you do is correct and it should work   However  since the X axis in your example is a DateTime axis the Major tick-marks  most probably  are appearing only at the both ends of the X axis  The other visible tick-marks are Minor tick-marks   The ax grid   method  by default  draws grid lines on Major tick-marks  Therefore  nothing appears in your plot   Use the code below to highlight the tick-marks  Majors will be Blue while Minors are Red   ax tick params which  both   width 3  ax tick params which  major   length 20  color  b   ax tick params which  minor   length 10  color  r     Now to force the grid lines to be appear also on the Minor tick-marks  pass the which  minor  to the method   ax grid b True  which  minor   axis  x   color   000000   linestyle  --     or simply use which  both  to draw both Major and Minor grid lines  And this a more elegant grid line   ax grid b True  which  minor   axis  both   color   888888   linestyle  --   ax grid b True  which  major   axis  both   color   000000   linestyle  -

[python] Getting vertical gridlines to appear in line plot in matplotlib

Examples related to python

Examples related to matplotlib

Examples related to pandas