R help - Mar 2006 - Strange Expression

Hello,
         I have a dataframe with a column 'col' of expressions of the
form
2*3+4*5+6*7 and substrings thereof.
Now
>eval(2*3+4*5+6*7) is ok.
But I want it done on that column... nothing seems to work
Even
> cil <- dataframe$col
>eval(cil[1])
2*3+4*5+6*7

I want the elements of the column evaluated.

Thanks,

A. Mani
Member, Cal. Math. Soc

	[[alternative HTML version deleted]]

On 3/3/06, ¨Tariq Khan <tariq.khan@gmail.com>
wrote:
>
> Did you try eval(parse(text = cil[1])) ?
>
> yes, function (x) eval(parse(x)) works within the *apply  commands.
thanks,
--
A. Mani
Member, Cal. Math. Soc

	[[alternative HTML version deleted]]

On 3/3/2006 7:09 AM, A Mani wrote:
> Hello,
>          I have a dataframe with a column 'col' of expressions of
the form
> 2*3+4*5+6*7 and substrings thereof.
Stored in what form?  It sounds from below that they may be character 
vectors or factors.  It would be easier to help if you gave a 
reproducible example.

Duncan Murdoch
> Now
>> eval(2*3+4*5+6*7) is ok.
> But I want it done on that column... nothing seems to work
> Even
>> cil <- dataframe$col
>> eval(cil[1])
> 2*3+4*5+6*7
> 
> I want the elements of the column evaluated.
> 
> Thanks,
> 
> A. Mani
> Member, Cal. Math. Soc
> 
> 	[[alternative HTML version deleted]]
> 
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