character string is not in a standard unambiguous format for exchange rate data

[KingofMammoths]

Hi,

I am planning to forecast DAX data (German stock exchange index). I have downloaded data from Yahoo Finance. When trying to calculate log-returns of the data with the formula

X.tmp<- read.csv("DAXz2016-2021wegmit0.csv",HEADER=TRUE)
x<- X.tmp$Close
n<- length(x)
xd<-100*diff(log(x))
nd<-n-1
time.nd<- as.Date(X.tmp$Date [1:nd]);

I get the error message character string is not in a standard unambiguous format

I have read several posts related to the error message but none of the answers seems to solve my problem.

Can anyone help me?

[technocrat]

If you can post representative data (sufficient to reproduce the problem) it will be more likely to attract answers. See the FAQ: How to do a minimal reproducible example reprex for beginners.

I suspect, in this case, that the problem lies in the argument to as.Date, in which case just the character string of X.tmp$Date is required.