problem with defining variable

Hi,

I've a problem with following code. I try to define 4 variables in 2 while loops: Gamma5, tau5 and Gamma and tau

For Gamma5 en tau5 I get the matrix correctly.

But for Gamma en tau, ( I do exactly the same for tau and Gamma) I get following error:

*
"Undefined function or variable 'Gamma'. "*

Does somebody know how to solve this?

Thanks in advance!

N =10
omega =90;
x= -0;
y= -0;
i = 0;
j = 0;
a = 11.35
b = 5.40
c = 8.60
d = 11.35/(2*N)
d2 = 5.40/(2*N)
d3 = 8.60/(2*N)
pz =2000

hG = 0.1;  %(pz/2h)

while (x <= a)

      while (y <= b)

         Gamma5(i+1,j+1) = sqrt(sind(omega)^2 + hG^2*(x.^2+y.^2-2*x.*y.*cosd(omega)))

         tau5(i+1,j+1) = (1/2)*(-pz/hG)*Gamma5(i+1,j+1)

         j =j+1;
         y= y+d2;

      end
     y = 0; %-a
     j = 0;
     x= x+d;
     i= i+1;
  end

while (x <= a)

      while (y <= b)

         Gamma(i+1,j+1) = sqrt(sind(omega)^2 + hG^2*(x.^2+y.^2-2*x.*y.*cosd(omega)));

         tau(i+1,j+1) = (1/2)*(-pz/hG)*Gamma(i+1,j+1);

         j =j+1;
         y= y+d2;

      end
     y = 0; %-a
     j = 0;
     x= x+d;
     i= i+1;
  end

[Daniel Shub]

Your code runs fine for me ...

Answer 1

[Jan]

Modern Matlab versions are case-sensitive. Then perhaps Gamma is partially confused with gamma(). Perhaps it helps, when you define the variable Gamma before using it:

Gamma = [];

But a pre-allocation would be better.

Answer 2

[Dirk]

Thanks, but its seems a problem with the variable and I dont know why...:(

variable names: G,T,X,Q

only G and T works

[Jan]

Please post only answers in the answers section. This might be a comment to my answer. I cannot read anything on your screen shot. A copy&pasted text would be much easier to read.

Answer 3

[Dirk]

I forgot this at the second loop: x= 0; y= 0; i = 0; j = 0;