Calculate covariance matrix for simple example

I have matrix such as

temp = [1 2 4 2 5; 100 300 200 600 100; 10 15 20 10 30]; %[A;B;C]

I want to calculate covariance of temp such that

the result should be

res = [2.7 -110 1.3; -110 43000 1.3; 13 -900 70]

Answer 1

[Chunru]

format longg
temp = [1 2 4 2 5; 100 300 200 600 100; 10 15 20 10 30];
res = cov(temp.')

res = 3×3

1.0e+00 * 2.7 -110 13 -110 43000 -900 13 -900 70

[NA]

Thank you. Why does not cov(temp) work?

[Chunru]

The cov function requires the input has the format: row representing observation, column representing variable.