Limiting the number of decimals in a dataframe (R)

Question

I would like to limit the number of decimals when a data frame is imported. My .txt input have 16 decimals to each row in collumn \"Value\". My dataframe look like that:

Answer 1

just throw a copy of this into the path of your project in a utils directory and source it when you run your script

"formatColumns" <-
 function(data, digits)
 {
    "%,%" <- function(x,y)paste(x,y,sep="")
    nms <- names(data)
    nc <- ncol(data)
    nd <- length(digits)
    if(nc!=nd) 
      stop("Argument 'digits' must be vector of length " %,% 
           nc %,% ", the number of columns in 'data'.")
    out <- as.data.frame(sapply(1:nc, 
                         FUN=function(x, d, Y)
                         format(Y[,x], digits=d[x]), Y=tbl, d=digits))
    if(!is.null(nms)) names(out) <- nms
    out
}

Now you can sit back and relax

formatColumns(MyData, digits=c(0,2,4,4,4,0,0))

et cetera et cetera et cetera