R: Filled contour plot with ggtern 2.2.1 -


i'm trying duplicate minitab ternary plot ggtern 2.2.1.

minitab ternary contour plot

my r code below:

mydata<-data.frame(x=c(0.00000, 0.16667, 0.66667, 0.16667, 0.50000, 0.50000,                         1.00000, 0.00000, 0.00000, 0.33333),                    y=c(0.00000, 0.16667, 0.16667, 0.66667, 0.00000, 0.50000,                         0.00000, 1.00000, 0.50000, 0.33333),                    z=c(1.00000, 0.66667, 0.16667, 0.16667, 0.50000, 0.00000,                         0.00000, 0.00000, 0.50000, 0.33333),                    a=c(0.546, 0.550, 0.455, 0.658, 0.451, 0.559, 0.355,                         0.762, 0.654, 0.554))  mydata$a_breaks<-cut(mydata$a,                       breaks=seq(0.4, 0.7, 0.1), include.lowest = true)  ggtern(mydata, aes(y, x, z))+   stat_interpolate_tern(aes(value=a, fill=..level..),                          geom="polygon",                         method="lm",                          binwidth=0.1,                          expand=1,                          base="identity")

i've gotten far replicating contour lines (see below), can't fill them. message

warning message: in structure(c(), class = c(class(x), class(y))) :     calling 'structure(null, *)' deprecated, null cannot have attributes.   consider 'structure(list(), *)' instead.

any guidance i'm doing wrong?

ggtern contour plot

by using answer this question, able approximating looking for, it's still not quite same -- instance, divisions between contours ragged.

library(ggplot2)  library(ggtern)   x<-seq(0,1,0.01) y<-seq(0,1,0.01)  mydata<-expand.grid(x=x,y=y)  mydata$z<-1 - (mydata$x + mydata$y) mydata<-mydata[mydata$z>(-0.01),] mydata$a<-(0.355*mydata$x + 0.762*mydata$y + 0.546*mydata$z) mydata$a_breaks<-cut(mydata$a, breaks=seq(0.3, 0.8, 0.1), include.lowest =                               true)  ggtern(mydata, aes(y, x, z, color=a_breaks))+   geom_point(size=5)+   scale_color_brewer(type="seq", palette = "blues")

r ternary contour plot


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