f_sts_var_core Function

public pure function f_sts_var_core(x, ddf) result(var)

Computes (sample) variance.

Arguments

Type IntentOptional Attributes Name
real(kind=wp), intent(in) :: x(:)

x vector (assumed size array)
real(kind=wp), intent(in) :: ddf

delta degrees of freedom

Return Value real(kind=wp)

variance


Calls

proc~~f_sts_var_core~~CallsGraph proc~f_sts_var_core f_sts_var_core proc~f_sts_mean_core f_sts_mean_core proc~f_sts_var_core->proc~f_sts_mean_core

Called by

proc~~f_sts_var_core~~CalledByGraph proc~f_sts_var_core f_sts_var_core proc~f_sts_pcc_core f_sts_pcc_core proc~f_sts_pcc_core->proc~f_sts_var_core proc~f_sts_std f_sts_std proc~f_sts_std->proc~f_sts_var_core proc~f_sts_std_core f_sts_std_core proc~f_sts_std_core->proc~f_sts_var_core proc~f_sts_trend_core f_sts_trend_core proc~f_sts_trend_core->proc~f_sts_var_core proc~f_sts_var f_sts_var proc~f_sts_var->proc~f_sts_var_core proc~s_lin_lda_2c s_lin_lda_2c proc~s_lin_lda_2c->proc~f_sts_var_core proc~s_nlp_hclust_core s_nlp_hclust_core proc~s_nlp_hclust_core->proc~f_sts_var_core proc~s_nlp_kmeans_core s_nlp_kmeans_core proc~s_nlp_kmeans_core->proc~f_sts_var_core interface~fsml_lda_2class fsml_lda_2class interface~fsml_lda_2class->proc~s_lin_lda_2c interface~fsml_std fsml_std interface~fsml_std->proc~f_sts_std interface~fsml_var fsml_var interface~fsml_var->proc~f_sts_var proc~f_sts_pcc f_sts_pcc proc~f_sts_pcc->proc~f_sts_pcc_core proc~f_sts_scc_core f_sts_scc_core proc~f_sts_scc_core->proc~f_sts_pcc_core proc~f_sts_trend f_sts_trend proc~f_sts_trend->proc~f_sts_trend_core proc~s_lin_eof s_lin_eof proc~s_lin_eof->proc~f_sts_std_core proc~s_nlp_hclust s_nlp_hclust proc~s_nlp_hclust->proc~s_nlp_hclust_core proc~s_nlp_hkmeans_core s_nlp_hkmeans_core proc~s_nlp_hkmeans_core->proc~s_nlp_hclust_core proc~s_nlp_hkmeans_core->proc~s_nlp_kmeans_core proc~s_nlp_kmeans s_nlp_kmeans proc~s_nlp_kmeans->proc~s_nlp_kmeans_core interface~fsml_eof fsml_eof interface~fsml_eof->proc~s_lin_eof interface~fsml_hclust fsml_hclust interface~fsml_hclust->proc~s_nlp_hclust interface~fsml_kmeans fsml_kmeans interface~fsml_kmeans->proc~s_nlp_kmeans interface~fsml_pcc fsml_pcc interface~fsml_pcc->proc~f_sts_pcc interface~fsml_trend fsml_trend interface~fsml_trend->proc~f_sts_trend proc~f_sts_scc f_sts_scc proc~f_sts_scc->proc~f_sts_scc_core proc~s_lin_pca s_lin_pca proc~s_lin_pca->proc~s_lin_eof proc~s_nlp_hkmeans s_nlp_hkmeans proc~s_nlp_hkmeans->proc~s_nlp_hkmeans_core interface~fsml_hkmeans fsml_hkmeans interface~fsml_hkmeans->proc~s_nlp_hkmeans interface~fsml_pca fsml_pca interface~fsml_pca->proc~s_lin_pca interface~fsml_scc fsml_scc interface~fsml_scc->proc~f_sts_scc

Source Code

pure function f_sts_var_core(x, ddf) result(var)

! ==== Description
!! Computes (sample) variance.

! ==== Declarations
  real(wp), intent(in) :: x(:) !! x vector (assumed size array)
  real(wp), intent(in) :: ddf  !! delta degrees of freedom
  real(wp)             :: xbar !! mean of x
  real(wp)             :: var  !! variance

! ==== Instructions
  xbar = f_sts_mean_core(x)
  var  = dot_product( (x - xbar), (x - xbar) ) / &
       & (real(size(x), kind=wp) - ddf)

end function f_sts_var_core