This looks like data for a morphometrics analysis so you should know about
package geomorph. Data like yours is often stored as a three dimensional array
so we switch to that format and then use the two.d.array() function in package
geomorph:
Assuming your dataset is called dat:
> arr <- array(as.matrix(dat[, -1]), dim=c(4, 2, 3))
> library(geomorph)
> mat <- two.d.array(arr)
> colnames(mat) <- paste0("p", rep(1:4, each=2),
+ rep(c("x", "y"), 4), rep(1:4, each=2))
> mat
p1x1 p1y1 p2x2 p2y2 p3x3 p3y3 p4x4 p4y4
[1,] 5 34 46 45 73 45 92 43
[2,] 7 26 48 42 72 44 90 43
[3,] 7 32 44 48 71 46 89 42
> dat2 <- data.frame(sample=1:3, mat)
> dat2
sample p1x1 p1y1 p2x2 p2y2 p3x3 p3y3 p4x4 p4y4
1 1 5 34 46 45 73 45 92 43
2 2 7 26 48 42 72 44 90 43
3 3 7 32 44 48 71 46 89 42
-------------------------------------
David L Carlson
Department of Anthropology
Texas A&M University
College Station, TX 77840-4352
-----Original Message-----
From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of minikg
Sent: Wednesday, August 19, 2015 9:29 AM
To: r-help@r-project.org
Subject: [R] data format
Hi,
I have a dataset consisting of landmarks of each sample's coordinates as
given below.
landmark X Y X Y X Y
P1 5 34 7 26 7 32
P2 46 45 48 42 44 48
P3 73 45 72 44 71 46
P4 92 43 90 43 89 42
please help me to change my data format to
sample p1x1 p1y1 p2x2 p2y2 p3x3 p3y3 p4x4 p4y4
1 5 34 46 45 73 45 92 43
2 7 26 48 42 72 44 90 43
3 7 32 44 48 71 46 89 42
Thanks
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
