Heatmap Slicer#

%matplotlib widget
import matplotlib.pyplot as plt
import numpy as np

from mpl_interactions import heatmap_slicer

Comparing heatmaps#

Sometimes I find myself wanting to compare horizontal or vertical slices across two different heatmaps with the same shape. The function heatmap_slicer() makes this easy and should work for any number of heatmaps from 1 to many (likely not all the way \(\infty\) though).

The most important options to play with are:

  • slices: "both", "vertical", or "horizontal"

  • interaction_type: "move" or "click"

x = np.linspace(0, np.pi, 100)
y = np.linspace(0, 10, 200)
X, Y = np.meshgrid(x, y)
data1 = np.sin(X) + np.exp(np.cos(Y))
data2 = np.cos(X) + np.exp(np.sin(Y))
fig, axes = heatmap_slicer(
    (data1, data2),
    heatmap_names=("dataset 1", "dataset 2"),
    labels=("Some wild X variable", "Y axis"),