plotscore {rchemo}

Plotting errors rates

Description

Plotting scores of prediction errors (error rates).

Usage

plotscore(x, y, group = NULL, 
    col = NULL, steplab = 2, legend = TRUE, legend.title = NULL, ncol = 1, ...)

Arguments

x

Horizontal axis vector (n).

y

Vertical axis vector (n)

group

Groups of data (n) to be plotted with different colors.

col

A color, or a vector of colors (of length equal to the number of groups), defining the color(s) of the groups.

steplab

A step for the horizontal axis. Can be NULL (automatic step).

legend

Only if there are groups. Logical indicationg is a legend is drawn for groups (Default to FALSE).

legend.title

Character string indicationg a title for the legend.

ncol

Number of columns drawn in the legend box.

...

Other arguments to pass in function plot.

Value

A plot.

Examples

n <- 50 ; p <- 20
Xtrain <- matrix(rnorm(n * p), ncol = p, byrow = TRUE)
ytrain <- rnorm(n)
Ytrain <- cbind(ytrain, 10 * rnorm(n))
m <- 3
Xtest <- Xtrain[1:m, ] 
Ytest <- Ytrain[1:m, ] ; ytest <- Ytest[, 1]

nlv <- 15
res <- gridscorelv(
    Xtrain, ytrain, Xtest, ytest, 
    score = msep, 
    fun = plskern, 
    nlv = 0:nlv, verb = TRUE
    )
plotscore(res$nlv, res$y1, 
          main = "MSEP", xlab = "Nb. LVs", ylab = "Value")

nlvdis <- 5
h <- c(1, Inf)
k <- c(10, 20)
nlv <- 15
pars <- mpars(nlvdis = nlvdis, diss = "mahal",
              h = h, k = k)
res <- gridscorelv(
    Xtrain, Ytrain, Xtest, Ytest, 
    score = msep, 
    fun = lwplsr, 
    nlv = 0:nlv, pars = pars, verb = TRUE)
headm(res)
group <- paste("h=", res$h, " k=", res$k, sep = "")
plotscore(res$nlv, res$y1, group = group,
          main = "MSEP", xlab = "Nb. LVs", ylab = "Value")