javascriptベースで手軽に対話的な操作が可能な作図が出来るPlotly Express(公式サイト)というライブラリが少し前に公開されたのを見つけました。 今までの静的な作図とは明らかに異なる次元のポテンシャルを感じたので、備忘録を兼ねて基本的な可視化手法の描き方をまとめました。 3.6.10.13. import numpy as np import matplotlib.pyplot as plt f = plt.figure() ax = f.add_subplot(111) a = np.arange(25).reshape((5,5)).astype(float) a[3,:] = np.nan ax.imshow(a, interpolation='nearest') f.canvas.draw() The resultant image is unexpectedly all blue (the lowest color in the jet colormap). While 3-D surface plots might be useful in some special cases, in general I think they should be avoided since they add a great deal of complexity to a visualization without adding much (if any) information beyond a 2-D contour plot. The answer is, first you interpolate it to a regular grid. imshow：热图（heatmap）是数据分析的常用方法，通过色差、亮度来展示数据的差异、易于理解 . While initially developed for plotting 2-D charts like histograms, bar charts, scatter plots, line plots, etc., Matplotlib has extended its capabilities to offer 3D plotting modules as well. matplotlib.pyplot.imshow ¶ matplotlib.pyplot.imshow(X, cmap=None, norm=None, *, aspect=None, interpolation=None, alpha=None, vmin=None, vmax=None, origin=None, extent=None, interpolation_stage=None, filternorm=True, filterrad=4.0, resample=None, url=None, data=None, **kwargs) [source] ¶ Display data as an image, i.e., on a 2D regular raster. A sample can be a document, a picture, a sound, a video, an astronomical object, a row in database or CSV . The plot shows heat interpolation between dots (sensors). 2D and 3D (or 4D) input: 2D input should be like heatmap, with easy ability to change color limit min and max (default is data min and max). ; In both cases, data must be invented. After that, we call the word cloud function and display the word cloud. import pandas as pd. Open-source demos hosted on Dash Gallery. The underlying image data is interpolated/resampled to fill that area. In the matplotlib imshow blog, we learn how to read, show image and colorbar with a real-time example using the mpimg.imread, plt.imshow () and plt.colorbar () function.

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