Repository navigation
Axis formatting by converting exponential numbers to normal numbers #304
Description
I am trying to reproduce the original python matplotlib functionality of being able to display fixed offsets in x, y, and z values in the chart axes to whole numbers. This question on stackoverflow, very well explains what I intend to do.
I have some representative Python code which does the job for me in matplotlib (Python). The following is the code:
fig = plt.figure()
fig.set_size_inches(10, 10)
ax = fig.add_subplot(projection='3d')
axis_formatter = ScalarFormatter(useOffset=False)
ax.scatter(self.x, self.y, self.z, marker='o')
ax.yaxis.set_major_formatter(axis_formatter)
ax.xaxis.set_major_formatter(axis_formatter)
ax.zaxis.set_major_formatter(axis_formatter)
Are there equivalent methods in matplotlib-cpp to achieve this same functionality?
Activity
lava commentedon Nov 4, 2026
Thanks for the detailed question! Controlling the offset and scientific notation fits the project. pyplot has
ticklabel_format, which acts on the current axes (including the z axis of 3D plots), so aplt::ticklabel_format(const std::map<std::string, std::string>& keywords = {})wrapper forwarding keywords such asaxis,styleanduseOffsetwould cover this. A PR that follows the existing conventions (keywords forwarded as kwargs, throw on failure liketitleorxlabel) plus a small example would be welcome. Keyword values arrive in Python as strings, souseOffsetneeds to be converted to a real boolean rather than passed as"False". Until then, master already lets you switch the offset off globally:plt::rcparams({{"axes.formatter.useoffset", "False"}});before plotting.🤖 This triage was made by the project's automated governance process. See the README for details.