R help - Jul 2007 - Substitution of Variables

Hi,

   I need to run a script under the variable (that
comes from a csv file) that is assigned to another
variable. This is very a simplified version of what I
want to do:

data<-read.csv('name.csv')
names(data)<-("VA","VB","VC")

v<-VA

mn(v)


Thank you in advance,

Judith
   




       
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I think you want:

v <- data$VA


On 7/2/07, Judith Flores <juryef@yahoo.com> wrote:
>
> Hi,
>
>   I need to run a script under the variable (that
> comes from a csv file) that is assigned to another
> variable. This is very a simplified version of what I
> want to do:
>
> data<-read.csv('name.csv')
> names(data)<-("VA","VB","VC")
>
> v<-VA
>
> mn(v)
>
>
> Thank you in advance,
>
> Judith
>
>
>
>
>
>
>
>
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> Check out fun summer activities for kids.
>
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?

	[[alternative HTML version deleted]]

On 02-Jul-07 23:01:07, Judith Flores wrote:
> Hi,
>    I need to run a script under the variable (that
> comes from a csv file) that is assigned to another
> variable. This is very a simplified version of what I
> want to do:
> 
> data<-read.csv('name.csv')
> names(data)<-("VA","VB","VC")
> 
> v<-VA
> 
> mn(v)
> 
> Thank you in advance,
> Judith
read.csv() makes 'data' into a dataframe. This is essentially
a list with named components. So VA is not yet available as
a variable in your program. The data for the variable you want
to call "VA" is stored as the component 'data$VA' of
'data'.
The names "VA", "VB", "VC" are the names you have
given to
the *components* of 'data'; you have not created separate
variables with these names.

So you can assign the data for VA directly to 'v' with:

  v<-data$VA

or (if you think you will need it later) create a variable VA
using

  VA<-data$VA

and, if you want a variable called 'v' as well, then:

  v<-VA

Hoping this helps,
Ted.

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E-Mail: (Ted Harding) <ted.harding at nessie.mcc.ac.uk>
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Date: 03-Jul-07                                       Time: 00:32:40
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