MATLAB: How to fix this error

Question

Hello everyone

function [cost] = costf(x)
global data; global finalcost;
% Compute individual differences
% Sum of squares performed by Matlab's lsqnonlin
for i=1:length(data)
cost(i)= data(i, 5) - call_heston_cf(data(i, 1),x(1), x(2), (x(5)+x(3)^2)/(2*x(2)), x(3), data(i, 4), x(4), data(i, 2),
data(i, 3));
end
% Show final cost
finalcost =sum(cost)^2
end

I have this code for calibration of Heston price and I get this error (for line 6 and 7):

Error: File: costf.m Line: 6 Column: 121
Expression or statement is incorrect--possibly unbalanced (, {, or [.
and also it says Parse error at <EOL>: usage might be invalid MATLAB syntax for line 6

and

Parse error at ')':usage might be invalid MATLAB syntax for line 7.

I'm really new to MATLAB and I really need your help.

Thank you for your time!

Answer 1

You split the code over multiple lines without using ... to indicate that the line was being continued. You should put all of that code of line 6 onto one line.

cost(i)= data(i, 5) - call_heston_cf(data(i, 1),x(1), x(2), (x(5)+x(3)^2)/(2*x(2)), x(3), data(i, 4), x(4), data(i, 2), data(i, 3));