Function returning multiple vectors

Hi,

I'd like to assemble three vectors in a function then return them to the caller. Something along these lines:

function [A, B, C] = myFct()

A(0) = 'Lorem'; A(1) = 'ipsum';

B(1) = -1 B(2) = 10

C(0) = 'Dolor' C(1) = 'amet'

The length of A, B and C is always identical.

Any suggestion would be greatly appreciated! Many thanks in advance!

Answer 1

[Paulo Silva]

function [A B C]=myFct
%if the values have diferent sizes or classes replace [] with {}
A=['Lorem' 'ipsum'];
B=[-1 10];
C=['Dolor' 'amet'];
end

Answer 2

[Sean de Wolski]

[a b c] = func_name()
 %define a b c
 a = {'lorem','ipsum'}
 b = [1 10]
 c = {'Dolor','amet'}
end

Call it from the command line or another function with

[a b c] = func_name

You may also want to read about cell arrays since that's what you'll need for multiple strings.

doc cell

MATLAB begins indexing at one, not zero, by the way.

Answer 3

[Macko]

That was incredibly fast! Many-many thanks!

Now, I can see I have simplified my problem too much. I actually want to set up the array value after doing some calculations first. The code would more likely be something like this:

function [A, B, C] = myFct(u)

if (u== 0) A(0) = 'Lorem'; else A(0) = 'Quisce'; endif

if (u<= 100) A(1) = 'ipsum'; else A(1) = 'dorum'; endif

Similar for the other two parameters.

Thanks a again!

[Sean de Wolski]

if (u== 0)

A(1) = 'Lorem';

else

A(1) = 'Quisce';

end

Remember what I said about zero based indexing! (it doesn't exist in ML)

[Paulo Silva]

you got the code almost done but like Sean said 'MATLAB begins indexing at one, not zero, by the way.'

if (u== 0)

A(1) = 'Lorem';

else

A(1) = 'Quisce';

end

[Paulo Silva]

Sean you are too fast lol

Answer 4

[Macko]

You guys are the best! :)

Here's my code:

function [objectIDs, animationNames, animationValues] = TEST_vSendMultipleEvents % This block supports the Embedded MATLAB subset. % See the help menu for details.

objectIDs(1) = -1;

animationNames(1)='Anim_1';

animationValues(1) = 1;

objectIDs(2) = -1;

animationNames(2)='Anim_2';

animationValues(2) = 100;

I'm getting this error: Undefined function or variable 'objectIDs'. The first assignment to a local variable determines its class.

Function 'Embedded MATLAB Function' (#40.166.175), line 5, column 1: "objectIDs"

Must be something really trivial, I'm overseeing here...

[Sean de Wolski]

objectDs is an oputput not an input. to have it taken as an input

function [objectIDs, animationNames, animationValues] = TEST_vSendMultipleEvents(objectIDs);

doc function

is probably worth a read.

[Macko]

Exactly! objectIDs is an output (vector) and I'm trying to set its values when the above error shows...

[Paulo Silva]

Embedded MATLAB Functions are always that annoying, the problem is that on those functions before you work with variables you must give them something of the same class (and probably size).

Initialize every variable you use with a value

objectIDs=[0 0];

animationNames=['' ''];

animationValues=[0 0];

%now insert your code

[Macko]

That seems to have solved the problem! Many thanks to both of you!

Answer 5

[Truong Dang Manh]

Sorry to interrupt you guys but the code above does not work, you have to modify: "A(1) = 'Lorem';" to "A(1,:)='Lorem'; ", because what you're trying to do is to create an array of strings. See here for more information: http://stackoverflow.com/questions/7100841/create-an-array-of-strings. P/S: I'm new here so please correct me if i'm wrong