Creating a heatmap of area from two equal matrices

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Charlie Milford
Charlie Milford 2022-9-7
回答： Muskan 2023-2-20
I have two equal matrices which represent values of 'phase' and 'speed' where each value represents an equal area of a grid.
How would I create a heatmap to show (%) of total area with one matrix on the x and one matrix on the y?
Thanks.

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回答（1 个）

Muskan
Muskan 2023-2-20
As per my understanding, we can follow the following steps:
1) Each matrix’s values should be normalised so that they fall between 0 and 1. We can use “mat2gray()” function for this.
2) The “hist3()” function can be used to produce a 2D histogram from the two matrices. A bivariate histogram is produced by this function with a predetermined number of bins in each dimension.
3)Convert the counts in the histogram to percentages of the entire area.
4) Use the “imagesc()” function to create a heatmap of the percentage of data.

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