simulink error:Class mismatch for variable 'exist'. Expected 'logical', Actual 'double'.

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I get a error in a MATLAB function block
coder.extrinsic('exist');
N=1296;
if exist('w_1','var')
W1=w_1;
else
W1=zeros(N,1);
end

回答(1 个)

chengxuan yu
chengxuan yu 2018-4-1
编辑:Walter Roberson 2018-4-1
Because 'exist' return a double value and 'if' need to follow a logical value.
you can modify the code like this:
if isequal(exist('w_1','var'),1)
W1=w_1;
else
W1=zeros(N,1);
end

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