Nothing
.plt.mat <-
function(x, cor.coef=TRUE, fit="loess",
col_fill=getOption("pt_fill"), col_color=getOption("pt_color"),
col.fit=getOption("fit_color"), col.bg=getOption("panel_fill"),
col.box=getOption("panel_color"),
col_trans=getOption("trans_pt_fill"),
pt.size=pt.size, size.miss=size.miss) {
panel.smooth <- function(x, y, fit.line=fit, pch=par("pch"), cex=.76,
col.pt=col_color, col.smooth=col.fit, span=2/3, iter=3, ...) {
my.usr <- par("usr")
rect(my.usr[1], my.usr[3], my.usr[2], my.usr[4], col=col.bg, border=col.box)
cex.adj <- ifelse(size.miss, 0.80 - 0.048*n.var, pt.size)
points(x, y, pch=21, col=col.pt, bg=col_fill, cex=cex.adj)
ok <- is.finite(x) & is.finite(y)
if (any(ok)) {
if (fit.line %in% c("loess", "lm")) {
yo <- order(x[ok]) # need to order x, then have y follow
x[ok] <- sort(x[ok])
y[ok] <- y[ok][yo]
if (fit.line == "loess") {
l.ln <- loess(y[ok] ~ x[ok])
lines(lowess(x[ok], y[ok], f=span, iter=iter), col=col.smooth, ...)
}
else if (fit.line == "lm") {
l.ln <- lm(y[ok] ~ x[ok])
lines(x[ok], fitted(l.ln), col=col.smooth, ...)
}
f.ln <- fitted(l.ln, ...)
p.ln <- predict(l.ln, se=TRUE) # get standard errors
prb <- (1 - 0.95) / 2 # 0.95 confidence level
up.ln <- f.ln + (qt(prb,length(x[ok])-1) * p.ln$se.fit)
dn.ln <- f.ln - (qt(prb,length(x[ok])-1) * p.ln$se.fit)
polygon(c(x[ok], rev(x[ok])), c(dn.ln, rev(up.ln)),
col=getOption("se_fill"), border="transparent") #
}
}
}
panel.cor <- function(x, y, ...) {
my.usr <- par("usr"); on.exit(par(usr = my.usr))
rect(my.usr[1], my.usr[3], my.usr[2], my.usr[4], col=col.bg, border=col.box)
par(usr=c(0, 1, 0, 1))
r <- cor(x, y)
txt <- .fmt(r, 2)
# maybe use par("fin")[1] / n.var to get size of each cell
cex.adj <- 1.6 - (0.065*n.var) # adjust size of displayed r # 1.274
text(0.5, 0.5, txt, cex=cex.adj, col="black") # or cex=cex.cor * r
}
text.diag <- function(x, y, nm, ...) { # nm from calling routine
my.usr <- par("usr")
rect(my.usr[1], my.usr[3], my.usr[2], my.usr[4], col=getOption("se_fill"),
border=col.box)
cex.adj <- 1.6 - (0.065*n.var) # adjust size of displayed var name
text(0.5, 0.5, nm, cex=cex.adj, col=getOption("lab_color"))
}
# -----
# begin
if (is.logical(fit)) if (fit) fit <- "loess"
if (getOption("sub_theme") == "black")
col_color <- getOption("lab_color")
n.var <- ncol(x)
par(bg=getOption("window_fill"))
if (!is.null(col_trans))
col_fill <- .maketrans(col_fill, (1-col_trans)*256)
if (cor.coef) # no missing data
pairs(na.omit(x), lower.panel=panel.smooth, upper.panel=panel.cor,
text.panel=text.diag)
else
pairs(na.omit(x), panel=panel.smooth, text.panel=text.diag)
}
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