 
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               3                6              4                 2
........
........
 
and so on.
While I have done all the related analysis, 
 
(1) how do I read
 
maturity   <-   c(1, 15, 30, 60, 90, 180)  # these are the part of column names in numeric class.
 
i.e. I want the no of days appearing in column name heads to be expressed like this.
 
(2) Also, how do select the subset of maturity e.g.
 
maturity_sub   <-  c(30, 60, 90)
 
 
Thanking you all in advance
 
 
Regards
 
 
Julia

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