Change colormap in app designer using Spinner

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)

Answer 1

[yanqi liu]

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);

Answer 2

[Cris LaPierre]

Look into using caxis.