在 Python/Matplotlib 中重置绘图的默认字体/颜色

Question

First time here and newbie so please bear with me.

I'm following along a data viz tutorial with matplotlib. I'm getting the same results (go me) but the font used (in the plot legend in particular) and the default co lours are different and no parameter has been set to change them. And of course the tutorial's stuff looks much nicer. I don't know why this happens but I'm thinking that maybe I did change some of the stuff in unrelated notebooks and those choices stuck. If so, how do I "reset" please?

I am not allowed to attach screenshots yet. Basically, my plot lines are light blue and orange while his are the traditional discrete dark blue and green. My legend font looks like bad excel while his looks like LateX.

Thank you for your suggestions.

Answer 1

There's a number of ways you can do this and they vary depending on the specific use case but the one I use most often is

from matplotlib import rcParams, rcParamsDefault
rcParams.update(rcParamsDefault)

Although it is likely the case that the tutorial is using a style other than the default so I wouldn't necessarily expect this to make your output look exactly like the tutorial. When using LaTex with matplotlib I use

pgf_with_latex = {
    "text.usetex": True,
    "pgf.rcfonts": False,
    "pgf.preamble": [
        r'\usepackage{color}'
    ]
}

rcParams.update(pgf_with_latex)

You can find more information here regarding customization and here regarding using LaTex with matplotlib.

Answer 2

To find all the built in matplotlib themes, use

plt.style.available

I think the normal one is 'default'. So add this before you make your plots:

plt.style.use(['default'])

But you can make your plots look even better than the tutorial by using some of the other ones.