R/weighted_colMeans.R

In sirt: Supplementary Item Response Theory Models

## File Name: weighted_colMeans.R
## File Version: 0.09

weighted_colMeans <- function( mat, wgt=NULL)
{
    wgt <- weighted_stats_extend_wgt( wgt=wgt, mat=mat )
    mat1 <- colSums( mat * wgt, na.rm=TRUE)
    mat2 <- colSums( wgt, na.rm=TRUE)
    mat1 <- mat1 / mat2
    return(mat1)
}