There is no ",", "&" or "|" between your if - arguments. Perhaps this causes the error. This works in the command window:
if ~(isa(pi, 'double') & isa(pi, 'uint8'))
fprintf('The image is not double or uint8. You may receive many warnings.\n');
fprintf('Cast your image to either before sending here.');
end
The image is not double or uint8. You may receive many warnings.
Cast your image to either before sending here.