R help - Apr 2009 - how to sort and plot data?

hi,
Previously my email very simple and less information. Let say I have raw
data as below:-

user_id  website          time
20        google            0930
21        yahoo            0935
20        facebook        1000
25        facebook        1015
61        google            0940
60        yahoo            1050
40        friendster        1115
61        google            1200
40        friendster        1215
25        google            1030
28        youtube          0830
30        facebook        0945

This data described about particular website viewed by particular ID  in one
day.

My problem is how to sort the data? So that, I can get information about one
user_id viewed how many website perday?

secondly, I want to plotted above data where x-axis (user_id) and
y-axis(website).

Actually, im new to R-project and still in learning process. So, I really
want you all help.
Thank you and I really appreciate everyone feedback.

regards,
Hema.

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Hem wrote:
> 
> user_id  website          time
> 20        google            0930
> 21        yahoo            0935
> 20        facebook        1000
> 25        facebook        1015
> 61        google            0940
> ...
> My problem is how to sort the data? So that, I can get information about
> one
> user_id viewed how many website perday?
> 
> 
Maybe you were looking at the wrong item, because what you want is not
sorting, but a table.

Check the documentation of table or ftable.

Dieter

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Hema,

This may work:
aggregate(hema[1],hema[2],function(x)length(unique(x))) to calculate how
many different websites each id visited. hema[1] is the website column,
hema[2] is user_id. You can always add more index columns like days to
aggregate().

Jun

On Thu, Apr 2, 2009 at 11:06 PM, Hemavathi Ramulu
<hema.ramulu@gmail.com>wrote:
> hi,
> Previously my email very simple and less information. Let say I have raw
> data as below:-
>
> user_id  website          time
> 20        google            0930
> 21        yahoo            0935
> 20        facebook        1000
> 25        facebook        1015
> 61        google            0940
> 60        yahoo            1050
> 40        friendster        1115
> 61        google            1200
> 40        friendster        1215
> 25        google            1030
> 28        youtube          0830
> 30        facebook        0945
>
> This data described about particular website viewed by particular ID  in
> one
> day.
>
> My problem is how to sort the data? So that, I can get information about
> one
> user_id viewed how many website perday?
>
> secondly, I want to plotted above data where x-axis (user_id) and
> y-axis(website).
>
> Actually, im new to R-project and still in learning process. So, I really
> want you all help.
> Thank you and I really appreciate everyone feedback.
>
> regards,
> Hema.
>
>        [[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.
>


-- 
Jun Shen PhD
PK/PD Scientist
BioPharma Services
Millipore Corporation
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Direct: 636-720-1589

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