Thank you jim.
On Saturday, June 6, 2015, Jim Lemon <drjimle...@gmail.com> wrote:
> Hi rosalinazairimah,
> I think the problem is that you are using "if" instead of "ifelse". Try
> this:
>
> wet_dry<-function(x,thresh=0.1) {
> for(column in 1:dim(x)[2]) x[,column]<-ifelse(x[,column]>=thresh,1,0)
> return(x)
> }
> wet_dry(dt)
>
> and see what you get.
>
> Also, why can I read your message perfectly while everybody else can't?
>
> Jim
>
> >> -----Original Message-----
> >> From: roslina...@gmail.com <javascript:;>
> >> Sent: Fri, 5 Jun 2015 16:49:08 +0800
> >> To: r-help@r-project.org <javascript:;>
> >> Subject: [R] if else statement for rain data to define zero for dry and
> >> one to wet
> >>
> >> Dear r-users,
> >>
> >> I have a set of rain data:
> >>
> >> X1950 X1951 X1952 X1953 X1954 X1955 X1956 X1957 X1958 X1959 X1960 X1961
> >> X1962
> >>
> >> 1 0.0 0.0 14.3 0.0 13.5 13.2 4.0 0 3.3 0 0
> 0.0
> >>
> >>
> >> 2 0.0 0.0 21.9 0.0 10.9 6.6 2.1 0 0.0 0 0
> 0.0
> >>
> >>
> >> 3 25.3 6.7 18.6 0.8 2.3 0.0 8.0 0 0.0 0 0
> 11.0
> >>
> >>
> >> 4 12.7 3.4 37.2 0.9 8.4 0.0 5.8 0 0.0 0 0
> 5.5
> >>
> >>
> >> 5 0.0 0.0 58.3 3.6 21.1 4.2 3.0 0 0.0 0 0
> 15.9
> >>
> >>
> >> I would like to go through each column and define each cell with value
> >> greater than 0.1 mm will be 1 and else zero. Hence I would like to
> attach
> >> the rain data and the category side by side:
> >>
> >>
> >> 1950 state
> >>
> >> 1 0.0 0
> >>
> >> 2 0.0 0
> >>
> >> 3 25.3 1
> >>
> >> 4 12.7 1
> >>
> >> 5 0.0 0
> >>
> >>
> >> ...
> >>
> >>
> >> This is my code:
> >>
> >>
> >> wet_dry <- function(dt)
> >>
> >> { cl <- length(dt)
> >>
> >> tresh <- 0.1
> >>
> >>
> >> for (i in 1:cl)
> >>
> >> { xi <- dt[,i]
> >>
> >> if (xi < tresh ) 0 else 1
> >>
> >> }
> >>
> >> dd <- cbind(dt,xi)
> >>
> >> dd
> >>
> >> }
> >>
> >>
> >> wet_dry(dt)
> >>
> >>
> >> Results:
> >>
> >>> wet_dry(dt)
> >>
> >> X1950 X1951 X1952 X1953 X1954 X1955 X1956 X1957 X1958 X1959 X1960
> >> X1961
> >> X1962 X1963 X1964 X1965 X1966 X1967 X1968 X1969 X1970 X1971 X1972 X1973
> >> X1974 X1975 X1976 X1977
> >>
> >> 1 0.0 0.0 14.3 0.0 13.5 13.2 4.0 0.0 3.3 0.0 0.0
> >> 0.0
> >> 4.2 0.0 2.2 0.0 4.4 5.1 0 7.2 0.0 0.0 0.0 5.1
> >> 0 0.0 0 0.3
> >>
> >> 2 0.0 0.0 21.9 0.0 10.9 6.6 2.1 0.0 0.0 0.0 0.0
> >> 0.0
> >> 8.4 0.0 4.0 0.0 4.9 0.7 0 0.0 0.0 0.0 0.0 5.4
> >> 0 3.3 0 0.3
> >>
> >> 3 25.3 6.7 18.6 0.8 2.3 0.0 8.0 0.0 0.0 0.0 0.0
> >> 11.0
> >> 4.2 0.0 2.0 0.0 14.2 17.1 0 0.0 0.0 0.0 0.0 2.1
> >> 0 1.7 0 4.4
> >>
> >> 4 12.7 3.4 37.2 0.9 8.4 0.0 5.8 0.0 0.0 0.0 0.0
> >> 5.5
> >> 0.0 0.0 5.4 0.0 6.4 14.9 0 10.1 2.9 143.4 0.0 6.1
> >> 0 0.0 0 33.5
> >>
> >>
> >> It does not work and give me the original data. Why is that?
> >>
> >>
> >> Thank you so much for your help.
> >>
> >> [[alternative HTML version deleted]]
> >>
> >> ______________________________________________
> >> R-help@r-project.org <javascript:;> mailing list -- To UNSUBSCRIBE and
> more, see
> >> https://stat.ethz.ch/mailman/listinfo/r-help
> >> PLEASE do read the posting guide
> >> http://www.R-project.org/posting-guide.html
> >> and provide commented, minimal, self-contained, reproducible code.
>
[[alternative HTML version deleted]]
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