percent: Calculate the percent value of a vector (stunning this isn't...

In tlumip/swimctr: Oregon SWIM v2.5 Commercial Transport (CT) Model

Description

Calculate the percent value of a vector (stunning this isn't built-in to R)

Usage

percent(x, y = sum(x), places = 1)

Arguments

x	Value or vector of number to calculate as percentage of y
y	The total to calculate percent x from, by default the sum of the value(s) of x
places	Number of places after the decimal to round the result to (default value is 1)

Details

This function calculates percentages, generally on values in data frame field. If you'd like the values to be normalized simply divide the result by 100. To use this function to calculate percent change simply code the current or future value as x and prior value to y as x-prior.

Examples

df$pct_varname <- percent(df$varname)   # Simple percentage
df$pct_varname <- percent(df$varname)/100.0    # Normalized value
df$pct_change <- percent(df$current, (df$current - df$prior), 3)  # % change

tlumip/swimctr documentation built on May 31, 2019, 3:53 p.m.