Using a function as an input to another

I have a function with two output arguments. I'm trying to pass it as an input to another function where I will need both outputs of the first function.

This is just a minimal example. The two functions:

function [X y] = M(d)

X = d;

[~,Y] = d;

end

function [A B] = N(a)

A = 2*a;

B = 3*a;

end

Basically, I want the following two lines to produce the same output

[a b] =N(3)

M(N(3))

[madhan ravi]

add comments to your code so that its easier to understand what you are trying to do

Answer 1

[Walter Roberson]

No, when a function has multiple outputs, the only way to capture them all is to use a real function and assign the results to variables. It is not possible in MATLAB to capture multiple outputs of a function inside an expression.

[kor vec]

Thanks. I guess I will have to work my way around it.

Answer 2

[madhan ravi]

function [X y] = M(d) %like this not sure what you want to do but a guess
X = d;
[~,Y] = d;
[A B] = @N
function [A B] = N(a)
A = 2*a;
B = 3*a;
end
end

[kor vec]

Thanks for replying.

I have two functions (f1 and f2)

f1 is working as intended and has two output arguments.

f2 is supposed to have f1 as the first input the argument f2(f1,...)

I need to operate on both outputs of f1 inside f2 but can only access the first.

[madhan ravi]

give a short example with numbers

[kor vec]

[a b] = f1(1) = [2 3]

f2(f1(1)) = 2 % I want this to produce [2,3]

[Walter Roberson]

You are not passing in a function: you are passing in a vector.

[madhan ravi]

Thank you sir Walter

[Walter Roberson]

[A B] = @N

would try to assign a handle to the function N to both A and B, but would fail because the operation of taking a handle to a function does not return multiple outputs.

[madhan ravi]

Oh ok sir thank you for clarifying