Variance Calculation in R

Hello,

Thanks everyone for helping me with the previous queries.

step 1: Here is the orginal data: short sample

	ProbeID	    Sample_1_D	Sample_1_C    Sample_2_D	   Sample_2_C
1	224588_at   2.425509867	11.34031409   11.46868531	   11.75741478

step 2: i calculate the variance of the sample using this R code

x<-1:20000
y<-2:141
data.matrix<-data.matrix(data[,y])#create data.matrix
variableprobe<-apply(data.matrix[x,],1,var)

step 3: however, when i type in variableprobe, it gives me this.

1	21.58257457

step 4: I need the code to output this:

	ProbeID	    Variance	
1	224588_at   21.58257457


What do i need to do to modify the code to give me better description like
the one above?

thank.
Keizer
	

sorry...in step 4-i need the R code to output in this format when i export
to
excel.

	ProbeID	    Variance	
1	224588_at   21.58257457

thanks



Keizer_71 wrote:

Hello,

Thanks everyone for helping me with the previous queries.

step 1: Here is the orginal data: short sample

	ProbeID	    Sample_1_D	Sample_1_C    Sample_2_D	   Sample_2_C
1	224588_at   2.425509867	11.34031409   11.46868531	   11.75741478

step 2: i calculate the variance of the sample using this R code

x<-1:20000
y<-2:141
data.matrix<-data.matrix(data[,y])#create data.matrix
variableprobe<-apply(data.matrix[x,],1,var)

step 3: however, when i type in variableprobe, it gives me this.

1	21.58257457

step 4: I need the code to output this:

	ProbeID	    Variance	
1	224588_at   21.58257457


What do i need to do to modify the code to give me better description like
the one above?

thank.
Keizer
	

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View this message in context:
http://www.nabble.com/Variance-Calculation-in-R-tp15790621p15790768.html
Sent from the R help mailing list archive at Nabble.com.

Hello,

Thanks everyone for helping me with the previous queries.

step 1: Here is the orginal data: short sample

	ProbeID	    Sample_1_D	Sample_1_C    Sample_2_D	   Sample_2_C
1	224588_at   2.425509867	11.34031409   11.46868531	   11.75741478

step 2: i calculate the variance of the sample using this R code

x<-1:20000
y<-2:141
data.matrix<-data.matrix(data[,y])#create data.matrix
variableprobe<-apply(data.matrix[x,],1,var)

step 3: however, when i type in variableprobe, it gives me this.

1	21.58257457

step 4: I need the code to output this:

	ProbeID	    Variance	
1	224588_at   21.58257457


What do i need to do to modify the code to give me better description like
the one above?

thank.
Keizer
	

Hi Henrique,

It is definitely better, but it doesn't show me the ProbeID which identify
the probes name

Here was the result when i export to excel with your code.

 "Variance"	
1 2.425509867 21.6216446425273	


any suggestions?

thanks,
Kei


Keizer_71 wrote:

Hello,

Thanks everyone for helping me with the previous queries.

step 1: Here is the orginal data: short sample

	ProbeID	    Sample_1_D	Sample_1_C    Sample_2_D	   Sample_2_C
1	224588_at   2.425509867	11.34031409   11.46868531	   11.75741478

step 2: i calculate the variance of the sample using this R code

x<-1:20000
y<-2:141
data.matrix<-data.matrix(data[,y])#create data.matrix
variableprobe<-apply(data.matrix[x,],1,var)

step 3: however, when i type in variableprobe, it gives me this.

1	21.58257457

step 4: I need the code to output this:

	ProbeID	    Variance	
1	224588_at   21.58257457


What do i need to do to modify the code to give me better description like
the one above?

thank.
Keizer
	

--
View this message in context:
http://www.nabble.com/Variance-Calculation-in-R-tp15790621p15791115.html
Sent from the R help mailing list archive at Nabble.com.

Try this:

write.table(cbind(data.matrix[1], Variance = apply(data.matrix[,-1],
1, var)),    file='file.xls')


On 02/03/2008, Keizer_71 <christophe.lo at gmail.com> wrote:

sorry...in step 4-i need the R code to output in this format when i
export
to
excel.

	ProbeID	    Variance	
1	224588_at   21.58257457

thanks



Keizer_71 wrote:

Hello,

Thanks everyone for helping me with the previous queries.

step 1: Here is the orginal data: short sample

	ProbeID	    Sample_1_D	Sample_1_C    Sample_2_D	   Sample_2_C
1	224588_at   2.425509867	11.34031409   11.46868531	   11.75741478

step 2: i calculate the variance of the sample using this R code

x<-1:20000
y<-2:141
data.matrix<-data.matrix(data[,y])#create data.matrix
variableprobe<-apply(data.matrix[x,],1,var)

step 3: however, when i type in variableprobe, it gives me this.

1	21.58257457

step 4: I need the code to output this:

	ProbeID	    Variance	
1	224588_at   21.58257457


What do i need to do to modify the code to give me better description

like

the one above?

thank.
Keizer
	

--
View this message in context:
http://www.nabble.com/Variance-Calculation-in-R-tp15790621p15790768.html
Sent from the R help mailing list archive at Nabble.com.

-- 
Henrique Dallazuanna
Curitiba-Paran?-Brasil
25? 25' 40" S 49? 16' 22" O