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xbus10
2006 May 31
2
How to choose columns in data.frame by parts of columns' names?
Dear all,
I have a data.frame which has names as following.
[1] "XG1" "YG1" "XEST" "YEST"
[2] "XNOEMP1" "XNOEMP2" "YNOEMP1" "YNOEMP2"
[3] "XBUS10" "XBUS10A" "XBUS10B" "XBUS10C"
[4] "YBUS10" "YBUS10A" "YBUS10B" "YBUS10C"
[5] "XOWNBUS" "XSELFEST" "YOWNBUS" "YSELFEST"
Those columns have names beginning with "X" or "Y". Each "X" is paired
by a "Y&qu...