[R] Changing sign of columns and values

[hanatezera]

I have the following data set in data frameIDnumber  OA  EA  beta1                         C       A       -0.052                         G        A        0.0983                          G        T        -0.789....I want to change the sign of negative beta. If the negative value change to postive i want to switch its EA and OA.My desire result will beIDnumber  OA  EA  beta1                         A      C     0.052                         G        A        0.0983                          T         G        0.789....Any one can help me with r codes? kind regards,Hana
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