Jeremy R. Johnson - 4 years ago 182
R Question

# Return value for minimum in group of columns

I have a group of columns, and I need a new column

`min123`
with the minimum value of these columns
`123a_1`
through
`123a_5`
.

``````dff <- structure(list(`MCI ID` = c("070405344", "230349820", "260386435","370390587", "380406805", "391169282", "440377986", "750391394","890373764", "910367024"),
`123a_1` = structure(c(16672, 16372,16730, 16688, 16700, 16783, 16709, 17033, 16786, 16675), class = "Date"),
`123a_2` = structure(c(17029, 16422, 17088, 17036, 17057,17140, 17072, 17043, 17141, 17038), class = "Date"),
`123a_3` = structure(c(NA_real_,NA_real_, NA_real_, NA_real_, NA_real_, NA_real_, NA_real_,NA_real_, NA_real_, NA_real_), class = "Date"),
`123a_4` = structure(c(NA_real_,NA_real_, NA_real_, NA_real_, NA_real_, NA_real_, NA_real_,NA_real_, NA_real_, NA_real_), class = "Date"),
`123a_5` = structure(c(NA_real_,NA_real_, NA_real_, NA_real_, NA_real_, NA_real_, NA_real_,NA_real_, NA_real_, NA_real_), class = "Date")),
.Names = c("MCI ID","123a_1", "123a_2", "123a_3", "123a_4", "123a_5"), row.names = c(NA,10L), class = "data.frame")
``````

``````library(dplyr)