How to create and load a custom colormap?

I've got a plot which I want to create a colormap which will enable me to see the wrapped properties of the property I'm using (0=2pi).

I've tried using:

colormapeditor

Where I can set the colours I want, and then:

ax=gca
mymap=colormap(ax);

Which, for my specific map, gives me a colormap of:

mymap =

    1.0000    1.0000         0
    1.0000    0.9688    0.0313
    1.0000    0.9375    0.0625
    1.0000    0.9063    0.0938
    1.0000    0.8750    0.1250
    1.0000    0.8438    0.1563
    1.0000    0.8125    0.1875
    1.0000    0.7813    0.2188
    1.0000    0.7500    0.2500
    1.0000    0.7188    0.2813
    1.0000    0.6875    0.3125
    1.0000    0.6563    0.3438
    1.0000    0.6250    0.3750
    1.0000    0.5938    0.4063
    1.0000    0.5625    0.4375
    1.0000    0.5313    0.4688
    1.0000    0.5000    0.5000
    1.0000    0.4688    0.5313
    1.0000    0.4375    0.5625
    1.0000    0.4063    0.5938
    1.0000    0.3750    0.6250
    1.0000    0.3438    0.6563
    1.0000    0.3125    0.6875
    1.0000    0.2813    0.7188
    1.0000    0.2500    0.7500
    1.0000    0.2188    0.7813
    1.0000    0.1875    0.8125
    1.0000    0.1563    0.8438
    1.0000    0.1250    0.8750
    1.0000    0.0938    0.9063
    1.0000    0.0625    0.9375
    1.0000    0.0313    0.9688
    1.0000         0    1.0000
    1.0000    0.0323    0.9677
    1.0000    0.0645    0.9355
    1.0000    0.0968    0.9032
    1.0000    0.1290    0.8710
    1.0000    0.1613    0.8387
    1.0000    0.1935    0.8065
    1.0000    0.2258    0.7742
    1.0000    0.2581    0.7419
    1.0000    0.2903    0.7097
    1.0000    0.3226    0.6774
    1.0000    0.3548    0.6452
    1.0000    0.3871    0.6129
    1.0000    0.4194    0.5806
    1.0000    0.4516    0.5484
    1.0000    0.4839    0.5161
    1.0000    0.5161    0.4839
    1.0000    0.5484    0.4516
    1.0000    0.5806    0.4194
    1.0000    0.6129    0.3871
    1.0000    0.6452    0.3548
    1.0000    0.6774    0.3226
    1.0000    0.7097    0.2903
    1.0000    0.7419    0.2581
    1.0000    0.7742    0.2258
    1.0000    0.8065    0.1935
    1.0000    0.8387    0.1613
    1.0000    0.8710    0.1290
    1.0000    0.9032    0.0968
    1.0000    0.9355    0.0645
    1.0000    0.9677    0.0323
    1.0000    1.0000         0
    

However, I can't seem to use it when I'm plotting using the following line:

    subplot(3,3,9);imagesc(reconThresh);title('Text (A)'); colormap(gca, 'mymap');
    

Having tried to load it using:

    load('mymap.mat');
    

Any help will be much appreciated, thank you!

[Stephen23]

It is not a good practice to put multiple statements on one line:

subplot(3,3,9);imagesc(reconThresh);title('Text (A)'); colormap(gca, 'mymap');

It is much clearer to give each statement its own line:

subplot(3,3,9);
imagesc(reconThresh);
title('Text (A)');
colormap(gca, 'mymap');

Answer 1

[Stephen23]

Assuming that mymap is a variable in the workspace:

colormap(gca,mymap);

[Grace]

Thank you very much.