Gaussian elimination using a system of equations, Ax=b

I am trying to use Gaussian elimintaion, where the Jacobian matrix is a 4x4 matrix denoted as A and b is a system of equations. However i keep getting the error, Array indices must be positive integers or logical values.

Error in GaussianElimination (line 27)

b = [sqrt((x-A1)^2 + (y-B1)^2 + (z-C1)^2) - c(t1-d);

is there any way to fix this

Answer 1

[Jan]

Replace

 c(t1-d)
 

by

 c * (t1-d)