Forum: help

RE: different colors for rows [ Reply ] By: Daniela S on 2012-07-13 12:42	[forum:36690]
Perfect, and big fat thanks to you for so much help.

RE: different colors for rows [ Reply ]
By: Julien Moeys on 2012-07-13 11:56

[forum:7182]

Hi Daniela,

in fact points, won't work here, because the x-y coordinates are not compatible with the clay-silt-sand one. "soiltexture" transform the data from clay-silt-sand into x-y coordinates that can be plotted inside the traingle.

So you have to use TT.points there.

Here is an example:
###
library( "soiltexture" )
USATex <- data.frame(
"CLAY" = c(38.77,41.85,39.35,38.95,45.58,44.76),
"SILT" = c(3.48,3.4,4.18,5.32,1.89,1.35),
"SAND" = c(57.75,54.75,56.46,55.72,52.53,53.89),
stringsAsFactors = TRUE) #

#plot the USDA-triangle
geo <- TT.plot( class.sys = "USDA.TT",cex.lab= 1,cex.axis=1)

# Prepare the vector of colors
colz <- rep( "red", time = nrow( USATex ) )
colz[1:4] <- "blue"

pchz <- rep( 16, time = nrow( USATex ) )
pchz[1:4] <- 17

# put points over it
TT.points( geo = geo, tri.data = USATex, pch=pchz, col=colz)
###

Hope it helps

With best

Julien

different colors for rows [ Reply ]
By: Daniela S on 2012-07-13 09:05

[forum:7180]

Hi,
its me again. Everything worked very well, but now I'd like to plot the data into the USDA-triangle and want that some rows get one color and the next another one.
What I tried:
#conclude rows to 1name
UIGVI5 <- USATex[1:4,]
UIGVI20 <- USATex[5:6,]

#plot the USDA-triangle
TT.plot( class.sys = "USDA.TT",cex.lab= 1,cex.axis=1)

# put points over it
points(UREI5, pch=17, col=1)
points(UREI20, pch=16, col=1)

The problem is that the points are on the false position. So I think I have to work with tri.data:
TT.plot( class.sys = "USDA.TT",cex.lab= 1,cex.axis=1,
tri.data = UREI5, pch=17, col=1)

But how can I put in more than 1name with different color into this plot?
Thanks for helping me again.
best grets