df.stack: Stack data frame by one classifier

In PMmisc: P&M Miscellaneous R Functions

Description

Stack data frame by one classifier. This function takes the first column as a ordering variable. Then it take the variables names and repeat as the second column. The last column will be data under each variable name. This function is created to enable easier investigation with apply functions.

Usage

df.stack(df,name)

Arguments

df	: a data frame used to stack
name	: new variable names of the data frame

Examples

df <- data.frame(matrix(nrow=100,ncol=100))
for(i in 1:100){
 df[,i] <- rep(runif(1,1,100),100)
}
dim(df)
hdf <- df.stack(df,c("date","tkr","price"))

PMmisc documentation built on May 1, 2019, 9:57 p.m.