Attempting to find all blocks in a subsystem that conform to external criteria.

Question

Brandon Emch 2022-11-11

2
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1848913-attempting-to-find-all-blocks-in-a-subsystem-that-conform-to-external-criteria

回答： SAI SRUJAN 2023-10-5

I'm attempting to find all blocks in a simulink subsytem that have positions within bounds determined by another block's position. When I run the code below. I see this error:

Error using Simulink.findBlocks Option 'MatchFilter' must be a valid MATLAB function handle.

Code will run fine without the second input to 'below_current'.

Is there a way to use FindOptions and MatchFilter with a function using additional inputs?

blk_copy_pos = get_param(gcbh,'Position');
blk_hndls = Simulink.findBlocks(base_block,Simulink.FindOptions('MatchFilter', {@below_current,blk_copy_pos},'SearchDepth',1));
function match = below_current(blk,blk_copy_pos)
match = false;
blk_pos = get_param(blk,'Position');
if blk_pos(4) > blk_copy_pos(2) && blk_pos(3)  >= blk_copy_pos(1) && blk_pos(1) <= blk_copy_pos(3)
     match = true;
end
end

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Answer 1

SAI SRUJAN 2023-10-5

0
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https://ww2.mathworks.cn/matlabcentral/answers/1848913-attempting-to-find-all-blocks-in-a-subsystem-that-conform-to-external-criteria#answer_1326654

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Hi Brandon Emch,

I understand that you are attempting to find all the blocks in a simulink subsystem that have positions within the bounds determined by another block's position.However you are facing an issue with Simulink.findBlocks and 'MatchFilter' option.

I can see that you are trying to pass arguments to the function handle as a Value pair to the option 'MatchFilter',which is leading to an error.The following code is an example on how to pass the arguments to the function.

myVariable=2;
function myFunction()
    % Access a variable from the base workspace
    myVariable = evalin('base', 'myVariable');
    % Use the variable in your function
    disp(myVariable);
end