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day30
2009 Nov 12
1
How to select the part of column name heads?
Dear R helpers,
Suppose I am reading a csv file as
yd = read.csv("mydata.csv")
The actual data in the mydata.csv file is say for example like this -
Date day_1 days_15 day_30 days_60 days_90 days_180
Nov 11 5 14 1 3 21 8
Nov 10 7 1 3 11 5 14
Nov 09 2 10 ...