I'm sorry. you seem to have misunderstood my data representation for input.
Here's what I have
c<-list(INT=c("1","2","3"),NUM=c("2.34","4.56","6.78"))
I need
c<-list(INT=c(1,2,3),NUM=c(2.34,4.56,6.78))


On Sun, Sep 5, 2010 at 7:57 PM, David Winsemius <dwinsemius@comcast.net>wrote:

> So there is one item per line and the task is to recognize the strings
> "INT" and "NUM" and create variables with numeric type and
>
> INT=c(2,3,4)
> NUM=c(2.37, 4.56)  # ???
>
> I worry that is not a full description of the task .... if there be more
> than just two variable names and if all the INTs have the same name, then
> they will get overwritten ....  but perhaps you have specified the problem
> completely, so here goes:
>
> > txt <- textConnection('INT
>
> + "2"
> + "3"
> + "4"
> +
> + NUM
> + "2.37"
> + "4.56"')
> > indat <- read.table(txt, stringsAsFactors=FALSE)
>
> > indat$nflag <- as.numeric(indat$V1)
> > cumsum(is.na(indat$nflag))
> [1] 1 1 1 1 2 2 2
>
> > by(indat$V1, cumsum(is.na(indat$nflag)), function(x)
> assign(as.character(x[1]), as.numeric(x[-1]) ,envir = .GlobalEnv) )
> cumsum(is.na(indat$nflag)): 1
> [1] 1 3 4
> -------------------------------------------------------------
> cumsum(is.na(indat$nflag)): 2
> [1] 2 5
> > INT
> [1] 1 3 4
> > NUM
> [1] 2 5
> .
>
>
>
>
> On Sep 5, 2010, at 9:33 AM, rajesh j 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 <dwinsemius@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 <dwinsemius@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
>>
>>
>>
> David Winsemius, MD
> West Hartford, CT
>
>


-- 
Rajesh.J

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