what's wrong with my program?

I'm completely confused.I have a large program and Matlab announce an error that I don't know what that is.

for F=1:PE*AE*RE

    GGP{F}=zeros(2,12);
    for i=1:12
        n=0;
        [GGP{F}(2,i),GGP{F}(1,i)]=cart2pol(GG{F}(1,i),GG{F}(2,i));
            for j=1:NodesTETA*NodesR*NodesZ
                if abs((GGP{F}(1,i)-p{j}(1))/Radiale)<1 && abs((GGP{F}(1,i)-p{j}(2))/peripherale)<1 && abs((GG{F}(3,i)-p{j}(3))/Axiale)<1
                    n=n+1;
                    NODZ{F,i}(n)=j;
                end
            end

    end
end
for F=1:PE*AE*RE
    for i=1:12
        *NODZ{F,i}=[3*NODZ{F,i}-2;3*NODZ{F,i}-1;3*NODZ{F,i}];*(line 193 error)
        NODZ{F,i}=NODZ{F,i}(:)';
    end
end

MATLAB error:

??? Undefined variable "NODZ" or class "NODZ".

Error in ==> ThesisMLS at 193

        NODZ{F,i}=[3*NODZ{F,i}-2;3*NODZ{F,i}-1;3*NODZ{F,i}];

Although I had identify NODZ in the first loop but it's undefined yet.

Answer 1

[Image Analyst]

Evidently your "if" statement never became true so you never got inside to do this line:

NODZ{F,i}(n)=j;

So NODZ is undefined when you try to use it later. I don't know why it didn't become true, all I know is it didn't.

[Image Analyst]

View this: http://blogs.mathworks.com/videos/2012/07/03/debugging-in-matlab/