→ Version française (link to french readme).

Simple script to create graph papers (with linear or log scale) using python3 and matplotlib. Ones can set the parameters à the beginning of the scripts. To use it, run (if matplotlib is installed):

python3 graph-paper.py

To select log scale, set xdecade and ydecade at the appropriate number of decades. Setting one of these variables to zero means linear scale. Example, for semi-log paper with three log modules on the x-axis and a linear y-axis, use :

# Number of decades for log scale
# set to zero for linear scale
xdecades = 3
ydecades = 0

The output file is created only if the variable save is set to True :

save = True

The output file name is set with filename and extension. Some widdcards are availlable :

• %x and %y are replaced by the value of xdecades and ydecades.
• %s is replaced by _semilog_n-decades or _log_n-m-decades (or nothing for linear scale).

For example :

filename="Papier%s"
extension=".pdf"

The paper and figure geometries are set by the following variables :

landscape   = True  # if true, swap width and height
centimeters = True  # if false, length unit is inch (matplotlib default)
paperwidth  = 21.0
paperheight = 29.7
figwidth    = 16.0
figheight   = 24.0
rightmargin = 2.5
topmargin   = 2.5

Line style of minor and major grid lines are set by the following variables :

major_linestyle = '-'
major_linewidth = 0.5
major_color     = "black"
major_alpha     = 1.0

minor_linestyle = '-'
minor_linewidth = 0.25
minor_color     = 'black'
minor_alpha     = 0.7

To show the figure, at the moment of the creation, use :

showfig = True