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sgmean

sgmean computes the trimmed mean using a proportional discount method on the extremes, replicating the behavior of Statgraphics software.

Unlike R’s built-in mean(..., trim), which removes boundary values entirely, sgmean applies a weighted reduction — producing results consistent with Statgraphics.

Installation

You can install sgmean from GitHub with:

# install.packages("devtools")
devtools::install_github("jcarlosgaviria/sgmean")

Usage

library(sgmean)

x <- c(2, 4, 6, 8, 100)

# sgmean method (Statgraphics compatible)
sgmean(x, trim = 0.05)

# Base R method (different result)
mean(x, trim = 0.05)

Author

Juan Carlos Gaviria Chaverra

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.