No, the examples dont cover it...if i have
dat <- list(INT = c("1","2","3"),
NUM = c("2.34","4.56","6.78"),
INT = c("4", "5", "6"),
NUM = c("3.44"))
I need to do a which on INT[0],NUM[0],INT[0] and NUM[0]...ie the [0] index
of all the vectors...
and test if they hold a value
On Sun, Sep 5, 2010 at 9:03 PM, Joshua Wiley <jwiley.ps...@gmail.com> wrote:
> On Sun, Sep 5, 2010 at 8:16 AM, rajesh j <akshay.raj...@gmail.com> wrote:
> > Hi,
> > in a way similar to names(dat), can I address a particular index of every
> > vector?
> > like [0] of all the vectors? So that I could do something like,
> > ints<-which(<required usage>=="x")
>
> Not sure I follow you exactly, but you can use which() with any
> logical test. Take a look at these examples, are any of them what you
> mean?
>
> example(which)
>
> If so (or even before) it would be worth it to read through
>
> ?which
>
> >
> > On Sun, Sep 5, 2010 at 8:34 PM, Joshua Wiley <jwiley.ps...@gmail.com>
> wrote:
> >>
> >> Hi Rajesh,
> >>
> >> This will work, unfortunately it seems like lapply() drops the names
> >> before it passes each element of the list which lead to my clumsy work
> >> around using which(). I'm sure there are other ways.
> >>
> >> dat <- list(INT = c("1","2","3"),
> >> NUM = c("2.34","4.56","6.78"),
> >> INT = c("4", "5", "6"),
> >> NUM = c("3.44"))
> >>
> >> ints <- which(names(dat)=="INT")
> >> nums <- which(names(dat)=="NUM")
> >>
> >> dat[ints] <- lapply(dat[ints], as.integer)
> >> dat[nums] <- lapply(dat[nums], as.numeric)
> >>
> >> str(dat)
> >>
> >> Cheers,
> >>
> >> Josh
> >>
> >> On Sun, Sep 5, 2010 at 6:33 AM, rajesh j <akshay.raj...@gmail.com>
> wrote:
> >> > The string vector actually comes as a part of a list, and the vector
> is
> >> > named "int", and the numbers are strings. I then have to make it a
> >> > vector
> >> > that is still called "int" and has 4,5,6 etc. the types are either
> >> > integer
> >> > or numeric. The number of items in the vector is unknown.
> >> >
> >> > here's an example,
> >> >
> >> > a list has vectors
> >> >
> >> > INT
> >> > "2"
> >> > "3"
> >> > "4"
> >> >
> >> > NUM
> >> > "2.37"
> >> > "4.56"
> >> >
> >> >
> >> >
> >> > On Sun, Sep 5, 2010 at 6:56 PM, David Winsemius
> >> > <dwinsem...@comcast.net>wrote:
> >> >
> >> >>
> >> >> On Sep 5, 2010, at 9:22 AM, rajesh j wrote:
> >> >>
> >> >> for e.g., I get the following as a string vector
> >> >> "int" "4" "5" "6"
> >> >> after reading the first element, I have to convert this to a integer
> >> >> vector
> >> >>
> >> >>
> >> >>
> >> >> But what is the right answer? And what number of items are possble
> per
> >> >> line? And what are the other possible type identifiers? We need an
> >> >> example
> >> >> that has enough complexity to allow testing.
> >> >>
> >> >> --
> >> >> David.
> >> >>
> >> >>
> >> >>
> >> >> On Sun, Sep 5, 2010 at 6:44 PM, David Winsemius
> >> >> <dwinsem...@comcast.net>wrote:
> >> >>
> >> >>>
> >> >>> On Sep 5, 2010, at 8:48 AM, rajesh j wrote:
> >> >>>
> >> >>> Hi,
> >> >>>>
> >> >>>> Is it possible to convert a string vector to integer or numeric
> >> >>>> vector?
> >> >>>> In
> >> >>>> my situation I receive data in a string vector and have to convert
> it
> >> >>>> based
> >> >>>> on a given type.
> >> >>>>
> >> >>>
> >> >>> Can you give an example? I don't understand either what sort of
> >> >>> conversion
> >> >>> you desire or what you mean by "convert it based on a given type."
> >> >>>
> >> >>> There are a couple of function you may want to consider but I am
> >> >>> having
> >> >>> difficulty convincing myself they answer the problem posed:
> >> >>>
> >> >>> ?charToRaw
> >> >>> ?stroi
> >> >>>
> >> >>> > strtoi(charToRaw("123 this is a string"), base=16) # convert to
> >> >>> decimal ASCII
> >> >>> [1] 49 50 51 32 116 104 105 115 32 105 115 32 97 32 115 116
> >> >>> 114
> >> >>> 105 110 103
> >> >>>
> >> >>> --
> >> >>>
> >> >>> David Winsemius, MD
> >> >>> West Hartford, CT
> >> >>>
> >> >>>
> >> >>
> >> >>
> >> >> --
> >> >> Rajesh.J
> >> >>
> >> >>
> >> >>
> >> >> David Winsemius, MD
> >> >> West Hartford, CT
> >> >>
> >> >>
> >> >
> >> >
> >> > --
> >> > Rajesh.J
> >> >
> >> > [[alternative HTML version deleted]]
> >> >
> >> > ______________________________________________
> >> > R-help@r-project.org mailing list
> >> > 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.
> >> >
> >>
> >>
> >>
> >> --
> >> Joshua Wiley
> >> Ph.D. Student, Health Psychology
> >> University of California, Los Angeles
> >> http://www.joshuawiley.com/
> >
> >
> >
> > --
> > Rajesh.J
> >
> >
> >
>
>
>
> --
> Joshua Wiley
> Ph.D. Student, Health Psychology
> University of California, Los Angeles
> http://www.joshuawiley.com/
>
--
Rajesh.J
[[alternative HTML version deleted]]
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