MATLAB: Image will not stay as icons in block library

errorsimulink

I'm making a simulink library and to personalize it, I am adding an icon to the block. The only issue is, when I close the library, I get a '???' in the middle, and I am able to apply the image again after I imread the image in the command line. What am I missing?

 image(imread('BW.jpg'),[.35, .3, .3, .4],'on')
 port_label('output', 1, 'signal out')
 port_label('input', 1, 'signal in')
 port_label('input', 2, 'tau')

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MATLAB: Problems with MaskDisplay command

You can just execute what you're passing in as the third parameter to set_param to make sure that it's a string (and not a cell-array). I get the same error in MATLAB when I say:

>> {'disp('{\bf\it\fontsize{20}\fontname{Calisto MT}MODEL}', 'texmode','on'); port_label('output', 1, 'qpp'); port_label('output', 2, 'qp'); port_label('output', 3, 'q'); port_label('input', 1, 'u')'}
   {'disp('{\bf\it\fontsize{20}\fontname{Calisto MT}MODEL}', 'texmode','on'); port_label('output', 1, 'qpp'); port_label('output', 2, 'qp'); port_label('output', 3, 'q'); port_label('input', 1, 'u')'}
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  Error: Unbalanced or unexpected parenthesis or bracket.

Just from a cursory glance, the problem is that you are not escaping the quotes in the string. So you need:

   set_param('sys/blockname', 'MaskDisplay', 'disp(''{\bf\it\fontsize{20}\fontname{Calisto MT}MODEL}'', ''texmode'',''on''); port_label(''output'', 1, ''qpp''); port_label(''output'', 2, ''qp''); port_label(''output'', 3, ''q''); port_label(''input'', 1, ''u'')')

MATLAB: Simulink mask display programmatically, how to make line shift

use char(10),

set_param( gcbh,'MaskDisplay', ['port_label(''input'', 1, ''in1'');',char(10),'port_label(''output'', 1, ''out1'');'] );

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MATLAB: Problems with MaskDisplay command

MATLAB: Simulink mask display programmatically, how to make line shift

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