Function to carry out the transformation into 2D space
for `triplot`

, `trilines`

etc.

`tritrafo(x, y = NULL, z = NULL, check = TRUE, tolerance = 0.0001)`

x

Vector of fractions of first component
OR 3-column matrix containing all three components (omitting `y`

and `z`

)
OR 3-element vector (for all three components, omitting `y`

and `z`

).

y

(optional) vector of fractions of second component.

z

(optional) vector of fractions of third component.

check

if `TRUE`

, it is checked whether `x+y+z=1`

and `x,y,z>=0`

for all cases.

tolerance

tolerance for above sum check.

A matrix with two columns corresponding to the two dimensions.

Projects the mixture given by `x`

, `y`

, and `z`

with `x`

, `y`

, `z`

between one and zero and `x+y+z=1`

into
a two-dimensional space.

For further details see `triplot`

.

# NOT RUN { tritrafo(0.1, 0.2, 0.7) tritrafo(0.1, 0.2, 0.6) # warning triplot() points(tritrafo(0.1, 0.2, 0.7), col="red") tripoints(0.1, 0.2, 0.7, col="green") # the same tritrafo(c(0.1,0.2), c(0.3,0.4), c(0.6,0.4)) tritrafo(diag(3)) point <- c(0.25,0.6,0.15) triplot(point, pch=16) text(tritrafo(point), "(0.25, 0.60, 0.15)", adj=c(0.5,2)) # add a label # }