I need to split a vector into values separated by comma to feed a handle_function

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Ionut
Ionut 2013-11-15
评论： Ionut 2013-11-15
Hi, I need a bit of help, I have a system of equations defined in a handle_function. The number of equations and unknowns can vary from n=3 to n=100.
such equation may be
KBC{i} = matlabFunction(Cr.*(eta(i)+h)+sum(B.*(sinh(J.*k*(eta(i)+h)))./cosh(J.*k.*h).*cos(J.*k.*x(i)))+Q) ;
This gets incorporated into a larger holder F = {KBC ; ..etc..; length};
the symbolic variables are B(j) (j=1:n), eta(i) (i=1:n+1) Cr Q k, the other variables are known.
I need to feed the handle function with the required input arguments, but since they vary, my wanted inputs are computed in a vector "X0". So going straight forward it lead me to a stupid ideea of:
F{i}{i}(X0)
but since you can't feed with a vector containing the input arguments I need to split so that
F{i}{i}(X0(1),..,X0(n))
I tried to use num2cell(X0) but the given separation is not accepted by the handle_function since the values have to be separated by comma.
Any ideea ?

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回答（1 个）

Matt J
Matt J 2013-11-15
编辑：Matt J 2013-11-15
One way,
X0cell=num2cell(X0);
F{i}{i}(X0cell{:})
Alternatively, you don't have to define your F{i}{i} to be a function of n-separate arguments. You could (and maybe should) write it as a function of a single vector argument X0. Compare:
function y=f1(x1,x2,x3)
x1+x2+x3;
function y=f2(X)
y=sum(X(1:3));
  1 个评论
Ionut
Ionut 2013-11-15
Thank you. The first option worked for me. The second way was not suitable for my case because my total number of variables and equations 2n+6 and their participation in the whole system was different a bit strange.
Thanks again.

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