How can the color range be changed in the imagesc function in MATLAB?

In Matlab, you can change the color range by setting the third parameter of the imagesc function. The third parameter is a vector of length 2, used to specify the upper and lower limits of the color mapping.操作如下：

% 创建一个矩阵作为示例数据
data = magic(5);

% 设置颜色映射的上下限为[0, 8]
imagesc(data, [0, 8]);

% 添加颜色条
colorbar;

In the code above, the first parameter of the imagesc function is the data matrix to be plotted, and the second parameter is the upper and lower limits of the color mapping. In this example, the upper and lower limits of the color mapping are set to [0, 8], which means that the minimum value in the matrix will correspond to the lowest color in the color mapping, and the maximum value will correspond to the highest color in the color mapping. Other values will be linearly mapped to colors within this range.

After the drawing is complete, you can use the colorbar function to display the color bar, allowing for a clearer understanding of the relationship between color and data.