Use exhaustive searcher in simulink model

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

Answer 1

[Salman Ahmed]

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