[R] Range across a List

[jim holtman]

Not exactly clear what the data in the list looks like.  Is it a
dataframe of the format you listed?  Do you want just a single range
for the dates?  Do you want to create one large dataframe and then
partition it by date to find the range?  You can do
"do.call(rbind,pp2)" to create the one large dataframe and then use
tapply to find the range of each date.

On 3/26/08, Ravi S. Shankar <ravis at ambaresearch.com> wrote:
> Hi R,
> I have a list
> > class(pp2)
> [1] "list"
>
> > length(pp2)
> [1] 1244
>
> It is in the below format
>      RIC Trade.Date Close.Price Currency.Code Convertion.Rate New.Price
> ABCD.SZ   2008/02/29       15.30        CNY          0.1408  2.154240
> ABCD.SZ   2008/01/31       15.27        CNY          0.1392  2.125584
> ABCD.SZ   2007/12/31       14.88        CNY          0.1371  2.040048
> ABCD.SZ   2007/11/30       11.07        CNY          0.1357  1.502199
> ABCD.SZ   2007/10/31       10.89        CNY          0.1340  1.459260
> ABCD.SZ   2007/09/28       12.77        CNY          0.1334  1.703518
>
> I want to find the range of pp2$New.Price for length(pp2) for each date
> Any help would be appreciated
>
> Thanks in advance
> Ravi
>
>
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-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?