Alex K wrote:
Hello,
I am very new to R, and this is certainly and uber-newby question:
I am trying to read a vector of numeric data that contains the log of daily DJI returns and simply plot a histogram of it.
The data I have is in a text file format, on each line a number represents the log of the returns of one day.
I have problems in reading this in a vector numeric format.
If I try
retr<- as.numeric(read.table("logDJI.TXT", header=FALSE, sep="", dec="." ));
read.table() returns a data.frame, as the docs point out, but as.numeric expects a vector.
Either extract the first (and only?) column or read the data using scan(), if there is really only one column.
Uwe Ligges
I get: " Error in as.double.default(read.table("logDJIm.TXT", header = FALSE, sep = "", : (list) object cannot be coerced to 'double'"
and when I try to plot:
plot(density(retr, width=.004), type="l", xlab="y", ylab="pdf");
I get:
"Error in density(retr, width = 0.004) : argument 'x' must be numeric"
If I try:
retr<- as.data.frame(read.table("logDJI.TXT", header=FALSE, sep="", dec="." ));
I get no reading or conversion error, but I get the same error when I try to plot as above.
Can anyone help with this?
Thank you in advance, Alex
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