Plot data from a .txt file using matplotlib

To plot data from .txt file using matplotlib, we can take the following steps −

• Set the figure size and adjust the padding between and around the subplots.
• Initialize empty lists for bar_names and bar_heights.
• Open a sample .txt file in read "r" mode and append to bar's name and height list.
• Make a bar plot.
• To display the figure, use show() method.

Example

from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True bar_names = [] bar_heights = [] for line in open("test_data.txt", "r"): bar_name, bar_height = line.split() bar_names.append(bar_name) bar_heights.append(bar_height) plt.bar(bar_names, bar_heights) plt.show()

"test_data.txt" contains the following data −

Javed 12 Raju   14 Rishi  15 Kiran 10 Satish 17 Arun 23

Output

It will produce the following output