Returns the standard deviation of an array. This function works column-wise by default.
y = std(x)
y = std(x, w)
y = std(x, w, d)
Scalar or array of any dimension.
Dimension of x across which to calculate the standard deviation. d can be in a range of 1 to the maximum supported array dimension (32). If you do not specify d, the function works with the first dimension whose size is not equal to 1.
Standard deviation of x. y is a scalar or an array.