Plot data points on top of Histogram

Question

I have histogram as follows:

I have some more data points which I want to plot on top of histogram with some value.

For eg:

RMSE of point a = 0.99

RMSE of point b = 1.5

So this two points should come on histogram and each should have different color.

Edit:

Here's my code for plotting histogram:

bins = [0.6, 0.8, 1, 1.2, 1.4, 1.6, 1.8, 2, 2.2, 2.4]
plt.hist(rms, bins=bins, rwidth= 1.2)
plt.xlabel('RMSE')
plt.ylabel('count')

plt.show()

How can I add new data point stored in some variable to it.

Answer 1

• Add vertical lines as markers at the points of interest.
• Also see Plot a horizontal line using matplotlib and How to draw vertical lines on a given plot in matplotlib
• Tested in python 3.8.11, pandas 1.3.2, matplotlib 3.4.3, seaborn 0.11.2

Imports and example data

import pandas as pd
import matplotlib.pyplot as plt
import seaborn as sns

tips = sns.load_dataset("tips")

Plot

• This is plotted with plt.hist, but also works with pandas.DataFrame.plot and seaborn.histplot:
  • tips.tip.plot(kind='hist', color='turquoise', ec='blue')
  • sns.histplot(data=tips, x='tip', bins=10, color='turquoise', ec='blue')

plt.figure(figsize=(10, 5))
plt.hist(x='tip', density=False, color='turquoise', ec='blue', data=tips)
plt.ylim(0, 80)
plt.xticks(range(11))

# add lines together
plt.vlines([2.6, 4.8], ymin=0, ymax=80, color='k', label='RMSE')

# add lines separately
plt.axvline(x=6, color='magenta', label='RMSE 1')
plt.axvline(x=8, color='gold', label='RMSE 2')

plt.legend()