Syntax for matlabFunction to produce vector variables and scalar variables

2013 1 30
2 个回答
4 次查看（30 天）

0 个投票

When doing this:
syms x y z t
r = (x^2 + y^2 + z^2)*exp(-t);
matlabFunction(r, 'file', 'my_function',...
'vars', {t, [x y z]});
The resulting function operates on vectors:
function r = my_function(t,in2)
%MY_FUNCTION
% R = MY_FUNCTION(T,IN2)
x = in2(:,1);
y = in2(:,2);
z = in2(:,3);
r = exp(-t).*(x.^2+y.^2+z.^2);
How should I write matlabFunction if want the following;
function r = my_function(t,in2)
%MY_FUNCTION
% R = MY_FUNCTION(T,IN2)
x = in2(1);
y = in2(2);
z = in2(3);

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回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-1-30

0 个投票

function [x,y,z] = my_function(t,in2)

3 个评论
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Maybe I wasn't clear enough. I mean how should write the command matlabFunction in order to get a function such
function r = my_function(t,in2)
%MY_FUNCTION
% R = MY_FUNCTION(T,IN2)
x = in2(1);
y = in2(2);
z = in2(3);
Azzi Abdelmalek
Azzi Abdelmalek 2013-1-30
You said, in my initial post matlabFunction returns in2 , in2 is an input to your function not an ouput
In the documentation you can find this http://www.mathworks.com/help/symbolic/matlabfunction.html. I meant that the command matlabFunction in the specific example creates a function with one output and two inputs. The two inputs of the generated function are in2 and t. The variable in2 in the generated function is a matrix. However, I want to create a function with the command matlabFunction that will generate a function with two inputs, of which one will be a vector and not a matrix. So I would like someone's help with the syntax of the command matlabFunction in order to achieve what I want. Is it more clear now?

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0 个投票

In the example that I showed in my initial post matlabFunction returns in2 as a matrix whereas I need a in2 to be a vector.

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