From: <szhan_at_uoguelph.ca>

Date: Fri 09 Dec 2005 - 08:47:53 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Dec 09 08:54:31 2005

Date: Fri 09 Dec 2005 - 08:47:53 EST

Hello, Everyone,

I am sorry that my message got truncated due to wrong format.
I hope it works now:

trt1rep1 trt1rep2 trt2rep1 trt2rep2 ctlrep1 ctlrep2

[1,] 50 54 98 89 40 45

*[2,] 60 65 76 79 34 43
**[3,] 86 83 34 45 38 34
**[4,] 67 78 88 98 45 41
**[5,] 55 59 77 88 56 66
*

$"b"

trt1rep1 trt1rep2 trt2rep1 trt2rep2 ctlrep1 ctlrep2

[1,] 55 54 88 86 42 40

*[2,] 66 65 86 99 44 48
**[3,] 80 86 44 55 38 44
**[4,] 77 78 98 92 35 41
**[5,] 50 53 87 88 46 56
*

.

I want to perform some operations on the list and then got a new list(say
expeffect) like this:

1. first average two replicates for each row in the matrix shown above (like for
treatment 1 using (trt1rep1+trt1rep2)/2) and get one value for each
treatment/control

2. then subtract average value of the control from the each treatment and get
one value for the treatment effect for each row in the matrix shown above
3. make a new list (say trteffect) with 2 elements (trt1 and trt2), each of
which consists of a matrix (10,000X5)with a row name same with old list's
element name, a column name corresponding to the row name of old list's matrix
like:

$"trt1"

[,1] [,2] [,3] [,4] [,5] a 9.5 24 48.5 29.5 -4 b 13.5 19.5 42 39.5 0.5.

$"trt2"

[,1] [,2] [,3] [,4] [,5] a 51 39 3.5 50 21.5 b 46 46.5 8.5 57 30.5.

Could you please help me to make this new list (expeffect)?
Thank you in advance!

Joshua

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Dec 09 08:54:31 2005

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