Change colormap in app designer using Spinner

Question

Konvictus177 2022-2-28

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1660185-change-colormap-in-app-designer-using-spinner

编辑： yanqi liu 2022-3-1

采纳的回答： yanqi liu

在 MATLAB Online 中打开

Hi,

I would like to interactively change the colormap in an app I created with app designer.

The prefered way to do this would be by using the spinner component in app designer.

When the spinner increases the color of the colormap at 0 should be assigned symmetrically in positive and negative colormap direction.

The Spinner is supposed to act like a filter.

E.g.:

Spinner = 2; Colormap from 2 to -2 should have same color as inital color at 0 from colormap.

Spinner = 1; Colormap from 1 to -1 should have same color as initial color at 0 from colormap.

Thanks.

Z = peaks;
x = linspace(0,2*pi);
y = linspace(0,2*pi);
figure()
imagesc(x,y,Z)
colorbar
colormap
% TODO: change the colormap interactively by using a spinner in such a way
% that the color of 0 will be assigned to whatever the Spinner is set to
% for both directions (negative and positive colormap)

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Answer 1

yanqi liu 2022-3-1

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1660185-change-colormap-in-app-designer-using-spinner#answer_906680

编辑：yanqi liu 2022-3-1

在 MATLAB Online 中打开

may be use colormap by self design base on data，such as

Z = peaks;
x = linspace(0,2*pi);
y = linspace(0,2*pi);
figure()
imagesc(x,y,Z)
colorbar
colormap;
% define map 
figure()
imagesc(x,y,Z)
colorbar
z = colormap(jet(64));
z(1:size(z,1)/2,:) = z(size(z,1)/2+1:end,:);
colormap(z);