Matlab: How to specify input in matlabFunction?

Question

matlabFunction() is a function that can convert symbolic to anonymous function. But how to specify what input arguments to be appeared on the anonymous function?

For example,

x = sym('x', [3, 1])
func = matlabFunction(x)

It returns a handle with:

func =

  function_handle with value:

    @(x1,x2,x3)[x1;x2;x3]

But how to make this to be returned:?

@(x) [x(1); x(2); x(3)]

that the whole x is the input arguments, not every element of it. This could be extremely useful when x has very long colums.

I can tell you how x can be used as an input to the anonymous function @(x1,x2,x3,..). will that be acceptable? — Sardar Usama
– Sardar Usama, Commented Feb 15, 2019 at 12:19
@SardarUsama what if x has 100 elements, it would be a disater to write down them all. — null
– null, Commented Feb 15, 2019 at 12:23
I can tell you how to do that automatically. I am not suggesting to manually write them — Sardar Usama
– Sardar Usama, Commented Feb 15, 2019 at 12:24

Sardar Usama · Accepted Answer · 2019-02-15 12:26:00Z

3

Instead of making that anonymous function, you can input the elements of x as a comma separated list to func by first converting x to a cell array.

xcell = num2cell(x);
func(xcell{:})

answered Feb 15, 2019 at 12:26

Sardar Usama

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Start-4 · Accepted Answer · 2025-05-24 08:56:05Z

1

Learn from:Generate Function with Vector Input Arguments

X = sym('X', [3, 3])
F=det(X)+X(1,1)

func = matlabFunction(F,"Vars",{X})

func(rand(3))

answered May 24 at 8:56

Start-4

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