How to calculate correlation coefficient between three dimensional matrix ?

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Hello,
I have two gridded matrix, matrix1 and matrix2 having latitude, longitude and months (180 x 360 x 12). I have calculated correlation coefficient and p-value between both matrices using corrcoeff function. Than I assigned three values in correlation matrix, 1 for positive correlation (p-value is <0.05), -1 for negative correlation (p-value is <0.05) and 0 for rest of the positive/negative correlation which have insignificant (>0.05) p-value. I wrote following code for correlation coefficient calculation:
for y = 1:180,
for x = 1:360,
A = matrix1(y,x,:);
B = matrix2(y,x,:);
[C,P] = corrcoef(A,B);
m = C(1,2);
n = P(1,2);
map1(y,x) = m;
pval(y,x) = n;
if map1 > 0 & pval <= 0.05;
cormap(y,x) = 1;
elseif map1 < 0 & pval <= 0.05;
cormap(y,x) = -1;
else
cormap(y,x) = 0;
end;
end;
end;
basically I want want to find significant and insignificant correlation values in correlation matrix. But using above code final output cormap is showing 0 value in entire matrix. I am not getting where I am wrong. Can anyone help me to solve this problem ?

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