[R] extract required data from already read data

[Joshua Wiley]

Try something like:

sample[which(sample$Domain==xxx & sample$sex==FeMale), ]

Hope that helps,

Josh

On Thu, May 6, 2010 at 10:04 PM, Mohan L <l.mohanphy at gmail.com> wrote:
> Hi all,
>
> I have data like this:
>
>>sample <- read.csv(file="sample.csv",sep=",",header=TRUE)
>> sample
>
>   stdate   Domain    sex age Login
> 1  01/11/09    xxx FeMale  25     2
> 2  01/11/09    xxx FeMale  35     4
> 3  01/11/09    xxx   Male  18    30
> 4  01/11/09    xxx   Male  31     3
> 5  02/11/09    xxx   Male  32    11
> 6  02/11/09    xxx   Male  31     1
> 7  02/11/09    xxx FeMale  29     1
> 8  02/11/09    xxx FeMale  23     5
> 9  03/11/09    xxx FeMale  25     9
> 10 03/11/09    xxx FeMale  35     6
> 11 03/11/09    xxx   Male  18     3
> 12 03/11/09    xxx   Male  31     0
> 13 04/11/09    xxx   Male  32    25
> 14 04/11/09    xxx   Male  31     1
> 15 04/11/09    xxx FeMale  29     0
> 16 01/11/09    yyy FeMale  25     2
> 17 01/11/09    yyy FeMale  35     4
> 18 01/11/09    yyy   Male  18    30
> 19 01/11/09    yyy   Male  31     3
> 20 02/11/09    yyy   Male  32    11
> 21 02/11/09    yyy   Male  31     1
> 22 02/11/09    yyy FeMale  29     1
> 23 02/11/09    yyy FeMale  23     5
> 24 03/11/09    yyy FeMale  25     9
> 25 03/11/09    yyy FeMale  35     6
>
>
> I have done the graph for all the data. Now I want to get data from
> particular Domain and Sex from above data, then I need to do the calculation
> , eg :
>
> # if both are true
> if(Domain == xxx && sex==FeMale)
>
> I need the data in another variable, like this
>
> 1  01/11/09    xxx FeMale  25     2
> 2  01/11/09    xxx FeMale  35     4
> 3  02/11/09    xxx FeMale  29     1
>
> I have failed to achieve it .  any help would greatly appreciated.
>
> Thanks & Rg
> Mohan L
>
>        [[alternative HTML version deleted]]
>
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>



-- 
Joshua Wiley
Senior in Psychology
University of California, Riverside
http://www.joshuawiley.com/