How to implement a formula in matlab?

Question

Mathematics

There is a formula:

where It is

necessary to score this formula in matlab, subject to the presence of 15 different data arrays. Those. you need to create 105 pairs. I don't understand how to square the difference between an array and its mean. Matlab refuses to do this.

Answer 1

1. there are two arrays: c1, c2
2. mean(c1), mean(c2) - calculation of the average for two arrays
3. c1meanc1 = abs(c1-mean(c1)), c2meanc2 = abs(c2-mean(c2) ) - calculation of the difference between the values ​​of the array and the average
4. sum1 = sum(c1meanc1.*c2meanc2) - calculation of the numerator in the formula: the sum of the product of item 3.
5. sqrt1 = sqrt(sum(c1meanc1.*c1meanc1)), sqrt2 = sqrt( sum(c2meanc2.*c2meanc2)) - calculation of the denominator of the formula: the roots of the sums of the square of the difference between the values ​​of the array and its average
6. f = (sum1)/(sqrt1*sqrt2) - the formula itself It
remains to make this formula fulfilled with the above condition.

Answer 2

We are not predictors here, so post the code.
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You are most likely trying to perform a scalar operation on an array, which is not possible. But you can perform this operation on all elements of the array, for this, put a dot in front of the operator, such operations are called "element wise operations", here is an example of elementary multiplication