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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          ...