Contourplot matplotlib，每第 n 行不同的颜色 [英] Contourplot matplotlib with every n-th line a different color

问题描述

是否可以在Matplitlib中创建一个轮廓图，使第n条线的颜色与其余颜色不同?我想要这个，因为这个较少的轮廓线显示的细节不够，而且所有相同的颜色使它太拥挤.例如:

Is it possible to create a contourplot in Matplitlib with every n-th line a different color then the rest? I would like to have this because this less contourlines are showing not enough detail, and all the same color makes it too crowded. For example:

推荐答案

是的，可以.您必须为每个级别指定颜色:

Yes, you can. You have to specify the colors for each level:

levels = np.logspace(0, np.log10(Z.max()), 100 )[30:80]
color_levels = ['r' if (i+5) % 10 == 0 else 'k' for i in range(len(levels))]
pyplot.contour(X, Y, Z, locator=ticker.LogLocator(), colors=color_levels, levels=levels, lw=2, norm=colors.LogNorm(), vmin=1, vmax=Z.max())

这里是 Z np.histogram2d() 的结果.使用 imshow 绘制底层 histogram2d.水平上的 [30:80] 切片是为了防止图像的中部和边缘混乱.

Herein is Z the results of the np.histogram2d(). The underlying histogram2d is plotted with imshow. The [30:80] slice on the levels is to prevent cluttering in the middle and edges of the image.

当然，您可以将color_levels 定义中的% 10 编辑为您喜欢的每个整数.

Of course you can edit the % 10 in the definition of color_levels to every integer of your liking.

结果是:

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