MATLAB Programming Fundamentals - MathWorks

message, Code Analyzer cannot determine whether xyz is a variable or a
function, and assumes it is a function. Code analysis cannot make a
determination because xyz has no obvious value assigned to it. However, the program
might have placed the value in the workspace in a way that code analysis cannot detect.

function y=foo(x)
.
.
.
y = xyz(x);
end

For example, in the following code, xyz can be a function, or can be a variable loaded
from the MAT-file. Code analysis has no way of making a determination.

function y=foo(x)
load abc.mat
y = xyz(x);
end

Variables might also be undetected by code analysis when you use the eval, evalc,
evalin, or assignin functions.

If code analysis mistakes a variable for a function, do one of the following:

• Initialize the variable so that code analysis does not treat it as a function.


• For the load function, specify the variable name explicitly in the load command line.
  For example:

function y=foo(x)

load abc.mat xyz

y = xyz(x);

end

Distinguish Structures from Handle Objects

Code analysis cannot always distinguish structures from handle objects. In the following
code, if x is a structure, you might expect a Code Analyzer message indicating that the
code never uses the updated value of the structure. If x is a handle object, however, then
this code can be correct.

function foo(x)
x.a = 3;
end

Check Code for Errors and Warnings