Matplotlib – How to plot a high resolution graph?

Michael Zippo

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I"ve used matplotlib for plotting some experimental results (discussed it in here: Looping over files and plotting. However, saving the picture by clicking right to the image gives very bad quality / low resolution images.

from glob import glob
import numpy as np
import matplotlib.pyplot as plt
import matplotlib as mpl

# loop over all files in the current directory ending with .txt
for fname in glob("./*.txt"):
    # read file, skip header (1 line) and unpack into 3 variables
    WL, ABS, T = np.genfromtxt(fname, skip_header=1, unpack=True)

    # first plot
    plt.plot(WL, T, label="BN", color="blue")

    plt.xlabel("Wavelength (nm)")
    plt.xlim(200,1000)
    plt.ylim(0,100)
    plt.ylabel("Transmittance, %")
    mpl.rcParams.update({"font.size": 14})
    #plt.legend(loc="lower center")
    plt.title("")
    plt.show()
    plt.clf()


    # second plot
    plt.plot(WL, ABS, label="BN", color="red")
    plt.xlabel("Wavelength (nm)")
    plt.xlim(200,1000)
    plt.ylabel("Absorbance, A")
    mpl.rcParams.update({"font.size": 14})
    #plt.legend()
    plt.title("")
    plt.show()
    plt.clf()

Example graph of what I"m looking for: example graph

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Oliver Lehnman

San Francisco | 2023-03-26

Thanks for explaining! I was stuck with Matplotlib – How to plot a high resolution graph? for some hours, finally got it done 🤗. Will get back tomorrow with feedback

Boris Danburry

New York | 2023-03-26

Maybe there are another answers? What Matplotlib – How to plot a high resolution graph? exactly means?. I am just not quite sure it is the best method

Julia Danburry

London | 2023-03-26

Thanks for explaining! I was stuck with Matplotlib – How to plot a high resolution graph? for some hours, finally got it done 🤗. I am just not quite sure it is the best method