R seems to multiply my data by -1

Question

Every time I try to upload a database into R (the file is in .xls, .csv or .txt) it transforms it and put a negative sign in front of every entry of my file. I do not really und

Answer 1

When you write

> data<-- read.table("C:\\Users\\....)

you are really writing

> data <- - read.table("C:\\Users\\....)

or equivalently

> data <- (-1) * read.table("C:\\Users\\....)

Just remove the second dash, and your data will not be multiplied by -1. R simply did what you told it to.