Hello R users,
I am trying to make a baricentric diagram like the ternary plot, but with 4
edges. I want to know how to calculate the centroid of the diamond. The 4
edges are A, B, C, D. If value of A=B=C=D, then the point should be at the
centre of the diamond. If A>B and B=C=D=0, Then the point should be at the
corner of A.
For diamond, how to convert the value of A,B,C,D into cartesian
co-ordinates ?. if x1,x2,y1,y2 are A,B,C,D, then someone suggested:
new_point <- function(x1, x2, y1, y2, grad=1.73206){
b1 <- y1-(grad*x1)
b2 <- y2-(-grad*x2)
M <- matrix(c(grad, -grad, -1,-1), ncol=2)
intercepts <- as.matrix(c(b1,b2))
t_mat <- -solve(M) %*% intercepts
data.frame(x=t_mat[1,1], y=t_mat[2,1])
}
But this is not working. Please do suggest some help.
thanks and best regards,
Alaguraj.V
[[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.
