fnWeight: A Flexibily Function to Calculate Proportions
In bfatemi/dvAnalytics: Advanced Analytics Powered by DaVinci Robotic Surgery

Description Usage Arguments Value Examples

This function will take in a data set (of class data.table) and will calculate shares by a specified volume, for a main variable (default is ToolName), and optional groupings.

1	fnWeight(dat, resp = NULL, term = NULL, calc = NULL)

`dat`	A dataset with a specified structure (details coming soon...)
`resp`	The variable we would like to calculate a share for
`term`	Any groupings we'd like to apply in our calculation
`calc`	An r expression that will determine the numerator of our share calculation

Returns a table with shares

##
## Basic use of FnMix
##
library(data.table)
library(easydata)

## Load example dataset:
##  - Then change all potential numeric columns, to numeric
##    classes (this does it safely, quickly, and by reference)
#
data("fiberCountyDem")
NumMorph(fiberCountyDem)

## Calculate each state's share of total US population,
## by each year in our data
#
result <- fnWeight(fiberCountyDem, "State", "Year", sum(Population))
head(result)