[R] Prevent read.table from converting "+" and "-" to 0

[Daren Tan]

I am using read.table("data.txt", sep="\t") to read in a tab-limited text file. However, two columns of data were read wrongly. read.table converts "+" and "-" in the two columns to 0. I have tried setting other parameters but to no avail. 

TIA
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