How can I print the heatmap as grayscale?

A = rand(5)

heatmap(A, option)

I want to see heatmap in grayscale.

OR

Can I use 'saveas' to save in grayscale?

Answer 1

[J Chen]

heatmap(A)
colormap(gray)

[도현 김]

Then, how do you invert the color?

[J Chen]

heatmap(A)
colormap('gray')
cmap = colormap;  % get current color map
cmap1 = cmap(256:-1:1,:);  % reverse color map
colormap(cmap1)

[Sean de Wolski]

colormap(flip(gray))

[도현 김]

Thank you sir !!!

Answer 2

[Richard Quist]

As of R2021a the exportgraphics function supports a Colorspace option for both image and vector formats that you can use to generate grayscale output:

exportgraphics(gca, 'output.jpg', 'colorspace', 'gray');

exportgraphics(gca, 'output.pdf', 'colorspace', 'gray');