MATLAB script code and function code in the same file? [duplicate]

Question

Possible Duplicate:
In MATLAB, can I have a script and a function definition in the same file?

Can I have MATLAB script code and function code in the same file?

%% SAVED IN FILE myfunc.m (otherwise fail)
function [out1] = myfunc( x )
out1 = sqrt( 1 + (cos(x))^2 );
end

%%
%OTHER CRAP
y = 1:10
% use myfunc

It doesn't seem to work, even with the end keyword there. Is this type of thing allowed or do I always need to have EACH function in its own properly named file?

I'm sure I saw functions and code that uses those functions in the same file a couple years ago.

Its not a duplicate, that question asks something different and is actually a lot more vague than what I'm asking here. — bobobobo
– bobobobo, Commented Mar 22, 2011 at 16:37
Although the other question is not very well written/formatted, both questions ask the same thing: if you can combine a script and a function definition in the same file. — gnovice
– gnovice, Commented Mar 22, 2011 at 16:48

rossb83 · Accepted Answer · 2011-03-22 20:11:43Z

9

If m-code has a function in it, all the code must be encapsulated by functions. The name of the entry-point function should match the filename. If you think about it, this makes sense because it favors code re-use.

You can try this:

filename: myScript.m

function [] = myScript()
 y = 1:10;
 out1 = myfunc(y);
end

function [out1] = myfunc( x )
 out1 = sqrt( 1 + (cos(x))^2 );
end

Then you can either hit F5, or from the matlab command prompt type myScript

edited Mar 22, 2011 at 20:11

answered Mar 22, 2011 at 16:30

rossb83

1,7624 gold badges23 silver badges41 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Andrew Janke Over a year ago

The entry-point function should match the filename, but the language does not enforce it. If it differs, Matlab will use the filename as the name of the function, ignoring the "function" line. It's a warning in mlint.

rossb83 Over a year ago

Thanks, I replaced must with should.

Community · Accepted Answer · 2017-05-23 12:10:14Z

3

rossb83's answer is correct, and just to extend that, you should know that functions can have subfunctions:

function sum = function myMath(a, b)
    foo = a + b;
    bar = mySubFunc(foo);
end

function bar = mySubFunc(foo)
    bar = foo^2;
end

edited May 23, 2017 at 12:10

CommunityBot

11 silver badge

answered Mar 22, 2011 at 16:40

eykanal

27.2k19 gold badges86 silver badges114 bronze badges

1 Comment

bobobobo Over a year ago

Stored in myMath.m. So you're saying any other function other than the "primary" function is considered a subfunction

Collectives™ on Stack Overflow

MATLAB script code and function code in the same file? [duplicate]

2 Answers 2

2 Comments

1 Comment

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

1 Comment

Linked

Related