replyr (version 0.2.0)

replyr_gather: Collect values found in gatherColumns as tuples

Description

Collect values found in gatherColumns as tuples naming which column the value came from (placed in measurementNameColumn) and value found (placed in measurementValueColumn). This is essentially a tidyr::gather, dplyr::melt, or anti-pivot.

Usage

replyr_gather(df, gatherColumns, measurementNameColumn, measurementValueColumn, useTidyr = FALSE, eagerCompute = FALSE)

Arguments

df

data item

gatherColumns

set of columns to collect measurements from

measurementNameColumn

new column to write measurement names to (original gatherColumns)

measurementValueColumn

new column to write measurement values to

useTidyr

if TRUE use tidyr instead of calculating on own (only works on local data types)

eagerCompute

if TRUE call compute on intermediate results

Value

data item

Examples

d <- data.frame(
  index = c(1, 2, 3),
  info = c('a', 'b', 'c'),
  meas1 = c('m1_1', 'm1_2', 'm1_3'),
  meas2 = c('m2_1', 'm2_2', 'm2_3'),
  stringsAsFactors = FALSE)
replyr_gather(d,c('meas1','meas2'),'meastype','meas')
replyr_gather(d,c('meas1','meas2'),'meastype','meas',useTidyr=TRUE)