mo_moment::skewness Interface Reference

Skewness of a vector. More...

Public Member Functions
real(sp) function	skewness_sp (dat, mask)
real(dp) function	skewness_dp (dat, mask)

Detailed Description

Skewness of a vector.

Calculates the skewness of a vector, i.e. the third standardised moment:

\[\tilde \mu_3 = \sum_i\left(\frac{(x-\bar x)}{\sigma_x}\right)^3\]

If an optinal mask is given, the average is only over those locations that correspond to true values in the mask. \(x\) can be single or double precision. The result will have the same numerical precision.

Example

 vec = (/ 1., 2, 3., -999., 5., 6. /)
 m   = skewness(vec, mask=(vec >= 0.))

See also example in test directory.

Parameters

[in]	real(sp/dp) :: dat(:)	1D-array with input numbers.
[in]	logical, optional :: mask(:)	1D-array of logical values with size(dat). If present, only those locations in vec corresponding to the true values in mask are used.

Return values

real(sp/dp) :: skewness

Skewness of all elements in dat.

Note

Input values must be floating points.

Author

Matthias Cuntz

Date

Nov 2011

Definition at line 528 of file mo_moment.f90.

Member Function/Subroutine Documentation

skewness_dp()

real(dp) function mo_moment::skewness::skewness_dp	(	real(dp), dimension(:), intent(in)	dat,
		logical, dimension(:), intent(in), optional	mask
	)

Definition at line 1588 of file mo_moment.f90.

skewness_sp()

real(sp) function mo_moment::skewness::skewness_sp	(	real(sp), dimension(:), intent(in)	dat,
		logical, dimension(:), intent(in), optional	mask
	)

Definition at line 1630 of file mo_moment.f90.

---

The documentation for this interface was generated from the following file:

• src/mo_moment.f90