[R] substract start from the end of the vector

[Chuck Cleland]

with(df, substr(DESCRIPTION, start=1, stop=nchar(DESCRIPTION) - 10))

?nchar

On 4/23/2010 11:57 AM, arnaud Gaboury wrote:
> Dear group,
> 
>  
> 
> Here is my df :
> 
>  
> 
> df <-
> 
> structure(list(DESCRIPTION = c("PRM HGH GD ALUMINIUM USD 09/07/10 ", 
> 
> "PRM HGH GD ALUMINIUM USD 09/07/10 ", "PRIMARY NICKEL USD 04/06/10 "
> 
> ), CREATED.DATE = structure(c(18361, 18361, 18325), class = "Date"), 
> 
>     QUANITY = c(-1L, 1L, 1L), CLOSING.PRICE = c("2,415.90", "2,415.90", 
> 
>     "25,755.71")), .Names = c("DESCRIPTION", "CREATED.DATE", 
> 
> "QUANITY", "CLOSING.PRICE"), row.names = c(NA, 3L), class = "data.frame")
> 
> 
>> df
> 
>                          DESCRIPTION                   CREATED.DATE
> QUANITY          CLOSING.PRICE
> 
> 1 PRM HGH GD ALUMINIUM USD 09/07/10    2020-04-09               -1
> 2,415.90
> 
> 2 PRM HGH GD ALUMINIUM USD 09/07/10    2020-04-09                1
> 2,415.90
> 
> 3              PRIMARY NICKEL USD 04/06/10    2020-03-04                1
> 25,755.71
> 
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> In the DESCRIPTION column, I want to get rid of the date (09/07/10 .). I
> know the function substr(x, start, stop), but in my case, I need to indicate
> I want to start from the end of the vector, and I have no idea how to pass
> this argument. 
>  
> TY for any help
> 
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> ***************************
> 
> Arnaud Gaboury
> 
> Mobile: +41 79 392 79 56
> 
> BBM: 255B488F
> 
> ***************************
> 
>  
> 
> 
> 	[[alternative HTML version deleted]]
> 
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-- 
Chuck Cleland, Ph.D.
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