reading data from Excel Spread sheet

Hi all,

I tried to read data from Excel spread sheet with using

read.csv(file.choose())
and
read.delim(file.choose())
but its showing                    " *??.?.*."

and also i tried with
read.table(file.choose())

then its showing             "   *      V1
                                        1 ??\021???*   "


can any one suggest how to read data from Excel Spread sheet

thanks & regards;

kiran

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