Use exhaustive searcher in simulink model

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leonidas86
leonidas86 2021-9-30
回答： Salman Ahmed 2021-10-12
Hello,
I would like to use the ExhaustiveSearcher() function in simulink by using a matlab function block. The target is to determine the nearest point in x-y- data set with reference to a given x-y-coordinate.
When running in Matlab the function works fine but in simulink I get an error "Cannot call protected member" when initializing the Mdl object.
Here is my code so far:
function [x,y] = getNearestPoint(xNED_Veh, yNED_Veh, xNED_Track, yNED_Track)
xyNED_Track = [xNED_Track yNED_Track];
Mdl = ExhaustiveSearcher(xyNED_Track);
Idx = knnsearch(Mdl,[xNED_Veh yNED_Veh]);
x = xNED_Track(Idx);
y = yNED_Track(Idx);
end

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回答（1 个）

Salman Ahmed
Salman Ahmed 2021-10-12
Hi,
You may try defining the function using coder.extrinsic in case the function is not supported. Try adding the following to your MATLAB Fcn block.
coder.extrinsic('ExhaustiveSearcher');
You may also consider preallocating some memory to Idx using coder.nullcopy. Try adding this line also, if you face any errors.
Idx = coder.nullcopy(zeros(s)); % replace s with the expected size of Idx

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