MATLAB/Simulink accuse me of logical indexing when I am not trying to logically index

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Margaret Schrayer 2020-12-3

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https://ww2.mathworks.cn/matlabcentral/answers/674808-matlab-simulink-accuse-me-of-logical-indexing-when-i-am-not-trying-to-logically-index

评论： Stephen23 2020-12-3

I was editing a Simulink model and tried to build. One of the embedded MATLAB functions (proprietary code from our lab software) threw an error :

'Logical indexing requires support of variable-sized arrays, which is currently disabled. Function 'Show_Target/Embedded MATLAB Function' (#150.3475.3480), line 107, column 33: "state"'

Note that line numbers are different here because I removed parts of the code you don't need to see. The reference to 'state' in question are the ones in the 'for ii = 1:num_targets' loop at the bottom of the snippet.

The input state_in is an int8, stateindices is a 5x11 matrix of doubles. target is a 1x25 matrix of doubles.

So far as I can tell, there is no logical indexing in the statement

fill_colour_col = stateindices(state(ii), 1);

So I am confused by the error message. This code has worked every time I have compiled this task until now, and I did not mess with the proprietary code.

function VCODE  = fcn(target, state_in, target_type, opacity_in, target_display, x_index, y_index, num_states, stateindices)
num_targets = size(target, 1);
if num_targets == length(state_in)
	state = reshape(state_in, num_targets, 1);
else
	state = state_in(1) * ones(num_targets, 1);
end
VCODE = zeros(num_targets, 70);
VCODE(:, 1) = target_type;
VCODE(:, 3) = target(:, x_index) * 0.01;
VCODE(:, 4) = target(:, y_index) * 0.01;
for ii = 1:num_targets
    %IMPORTANT PART THAT THREW ERROR:
	fill_colour_col = stateindices(state(ii), 1);
	stroke_colour_col = stateindices(state(ii), 2);
	stroke_width_col = stateindices(state(ii), 3);
%Function proceeds after this, the statements directly above inside the for loop are what threw the error.