melt.keyed: Melt a Keyed Data Frame

In metrumrg: Pharmacometric Tools for Data Preparation, Modeling, Simulation, and Reporting

Description

Melt an object with class c('keyed','data.frame'). See also melt.data.frame.

Usage

## S3 method for class 'keyed'
melt(
  data, 
  id.vars=key(data), 
  measure.vars, 
  variable_name = "variable", 
  na.rm = FALSE, 
  ...
)

Arguments

data	passed to melt
id.vars	passed to melt
measure.vars	passed to melt
variable_name	passed to melt
na.rm	passed to melt
...	passed to melt

Details

The package reshape declares the S3 generic melt, and declares a data.frame method for it. The keyed method is similar, but returns a keyed object. The key consists of all columns except value.

Value

An object with class c('keyed','data.frame')

Author(s)

Tim Bergsma

References

http://metrumrg.googlecode.com

See Also

• cast,keyed-method

Examples

time <- rep(2,8)
start <- cumsum(time)
start <- as.mTime(as.second(as.hour(start)))
stop <- start + as.second(as.minute(30))
x <- data.frame(
  subj = rep(c('a','b'), each=4),
  period = 1:4,
  start=start,
  stop=stop
)
x <- as.keyed(x, c('subj','period'))
x 
summary(x)
y <- melt(x)
y
summary(y)
cast(y)

metrumrg documentation built on May 2, 2019, 5:55 p.m.