How to run som_demo4 in somtoobox? Thank you~

Hi guys, I am learning SOM these days, when I run som_demo4.m in somtoolbox downloaded from http://www.cis.hut.fi/somtoolbox/, MATLAB showed that:"

Cannot convert double value -1 to a handle

Error in som_show (line 497) h_colorbar(i,1)=-1;

Error in som_demo4 (line 40) som_show(sM,'umat','all','comp',[1:4],'empty','Labels','norm','d');"

Is there anybody can help me fix this? I am using MATLAB 2015 under Win10. Thank you~

Answer 1

[Walter Roberson]

The code is designed for MATLAB R2014a or earlier in which handles were represented as floating point numbers.

You could change that line to

h_colorbar(i,1) = gobjects(1,1);

to get a GraphicsPlaceholder . However there is very likely some other code somewhere in the toolbox that is checking for that negative value. Those tests should be replaced with isgraphics() tests... if you can find the locations.

[Jianshe Feng]

Thank you for your helpful answer. I commented the original line and add the new one and it works.

[Tuan Tran]

Hi every one,

How can I fix these errors. I am using Matlab 2018b.

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som_show(sM,'norm','n');

Error using axes

Handles of type ColorBar cannot be made the current Axes.

Error in som_recolorbar (line 300)

mem_axes=gca; axes(h_(i));

Error in som_show (line 523)

h_colorbar=som_recolorbar('all', 3, General.scale);

%refresh colorbars

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