MATLAB: Submatrix block with dynamical parameter

dynamical parametersimulinksubmatrix

Hi,

A frame based column vector shall be split and changed to a submatrix with the Submatrix block. Now the problem is, the parameter “Starting row offset” must be set to the first element of this vector, that is, dynamically.

For example, if the original vector is [1;2;3;4;5], then the parameter “Starting row offset” shall be 1. Is it possible with this Submatrix block? Or, are there other ways to solve this problem?

Thanks Senmeis

Best Answer

This blog post on How Do I Change a Block Parameter Based on the Output of Another Block? explains why can't achieve what you need with a Submatrix block. Perhaps you should use the (Embedded) MATLAB Function block and write your own MATLAB code that does what you need. Note that if the starting row offset is dynamic, your output will be a variable-size signal, and you need to configure the output of the MATLAB Function block accordingly.

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MATLAB: Creating matrix w.r.t. rows number of another matrix

E.g., a method using a cell array

u = unique(col_row(:,1));
n = numel(u);
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for k=1:n
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This assumes that all of the "row" numbers are positive integers. If they are not, then one could do this instead

u = unique(col_row(:,1));
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result = cell(n,1);
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MATLAB: What is the function of the undocumented block parameter “SourceBlock” for certain blocks in Simulink 6.6 (R2007a)

A block which is a library block, and has an unresolved library link is represented by a Bad Link block in a Simulink block diagram. Such a "Bad Link" block has the block property "SourceBlock" which refers to the missing library block. For example, if you change the library name from lib1 to lib2 then the following would work.

bad_links = find_system(model, 'LinkStatus', 'Unresolved');
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Best Answer

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MATLAB: Creating matrix w.r.t. rows number of another matrix

MATLAB: What is the function of the undocumented block parameter “SourceBlock” for certain blocks in Simulink 6.6 (R2007a)

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