Simple Button

I'm trying to make simple button that will update image of a matrix with each press. Image should cycle through colors from blue to red. See code modified from GUI example below (how to update S.v?):

function [] = GUI_10()

S.fh = figure('units','pixels',...

              'position',[200 200 500 500],...
              'menubar','none',...
              'numbertitle','off',...
              'name','GUI_10',...
              'resize','off');
S.ax = axes('units','pixels',...
            'position',[75 150 350 350]);
S.v=ones(3,3);
S.im = image(S.v);
S.pb = uicontrol('style','push',...
                 'units','pixels',...
                 'position',[10 10 180 30],...
                 'fontsize',14,...
                 'string','Next',...
                 'callback',{@pb_call,S});

function [] = pb_call(varargin)

S = varargin{3};

S.v=S.v+1;

S.im=image(S.v);

Answer 1

[Walter Roberson]

Please see this FAQ