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summaryP <- function(formula, data=NULL,
subset=NULL, na.action=na.retain,
exclude1=TRUE, sort=TRUE,
asna=c('unknown', 'unspecified'), ...) {
formula <- Formula(formula)
Y <- if(length(subset))
model.frame(formula, data=data, subset=subset, na.action=na.action)
else
model.frame(formula, data=data, na.action=na.action)
X <- model.part(formula, data=Y, rhs=1)
Y <- model.part(formula, data=Y, lhs=1)
nY <- NCOL(Y)
nX <- NCOL(X)
namY <- names(Y)
if(nX == 0) X <- data.frame(x=rep(1, NROW(Y)))
else {
## Remove observations with any values of X NA
i <- apply(is.na(X), 1, any)
if(any(i)) {
X <- X[! i,, drop=FALSE]
Y <- Y[! i,, drop=FALSE]
}
}
ux <- unique(X)
Z <- NULL
n <- nrow(X)
if(sort) {
## Compute marginal frequencies of all regular variables so can sort
mfreq <- list()
for(ny in namY) {
y <- Y[[ny]]
if(!inherits(y, 'ynbind') && !inherits(y, 'pBlock')) {
if(length(asna) && (is.factor(y) || is.character(y)))
y[y %in% asna] <- NA
freq <- table(y)
counts <- as.numeric(freq)
names(counts) <- names(freq)
mfreq[[ny]] <- - sort(- counts)
}
}
}
for(i in 1 : nrow(ux)) {
j <- rep(TRUE, n)
if(nX > 0) for(k in 1 : nX) j <- j & (X[[k]] == ux[i, k])
for(k in 1 : nY) {
## y <- yx[[k]] doesn't work as attributes lost by [.data.frame
y <- Y[[k]]
y <- if(is.matrix(y)) y[j,, drop=FALSE] else y[j]
# y <- (Y[[k]])[j,, drop=FALSE]
if(inherits(y, 'ynbind') || inherits(y, 'pBlock')) {
overlab <- attr(y, 'label')
labs <- attr(y, 'labels')
z <- NULL
for(iy in 1 : ncol(y)) {
tab <- table(y[, iy])
no <- as.numeric(sum(tab))
d <- if(inherits(y, 'ynbind'))
data.frame(var=overlab,
val=labs[iy],
freq=as.numeric(tab['TRUE']),
denom=no)
else
data.frame(var=overlab,
val=names(tab), # paste(labs[iy], names(tab)),
freq=as.numeric(tab),
denom=no)
z <- rbind(z, d)
}
}
else { # regular single column
if(length(asna) && (is.factor(y) || is.character(y)))
y[y %in% asna] <- NA
tab <- table(y)
ny <- namY[k]
la <- label(y)
if(la == '') la <- ny
lev <- names(tab)
mf <- mfreq[[ny]]
no <- as.numeric(sum(tab))
if(exclude1 && length(mf) == 2) {
lowest <- names(which.min(mf))
z <- data.frame(var=la, val=lowest,
freq=as.numeric(tab[lowest]),
denom=no)
}
else {
if(sort) lev <- reorder(lev, (mfreq[[ny]])[lev])
z <- data.frame(var=la, val=lev,
freq=as.numeric(tab),
denom=no)
}
}
## Add current X subset settings
if(nX > 0) for(k in 1: nX) z[[names(ux)[k]]] <- ux[i, k]
Z <- rbind(Z, z)
}
}
structure(Z, class=c('summaryP', 'data.frame'), formula=formula,
nX=nX, nY=nY)
}
plot.summaryP <-
function(x, formula=NULL, groups=NULL, xlim=c(-.05, 1.05), text.at=NULL,
cex.values=0.5,
key=list(columns=length(groupslevels),
x=.75, y=-.04, cex=.9,
col=trellis.par.get('superpose.symbol')$col, corner=c(0,1)),
outerlabels=TRUE, autoarrange=TRUE, ...)
{
X <- x
at <- attributes(x)
Form <- at$formula
nX <- at$nX
nY <- at$nY
groupslevels <- if(length(groups)) levels(x[[groups]])
condvar <- setdiff(names(X), c('val', 'freq', 'denom', groups))
## Reorder condvar in descending order of number of levels
numu <- function(x) if(is.factor(x)) length(levels(x))
else length(unique(x[! is.na(x)]))
if(autoarrange && length(condvar) > 1) {
nlev <- sapply(X[condvar], numu)
condvar <- condvar[order(nlev)]
}
form <- if(length(formula)) formula
else as.formula(
paste('val ~ freq',
paste(condvar, collapse=' * '), sep=' | '))
pan <- function(x, y, subscripts, groups=NULL, ...) {
y <- as.numeric(y)
denom <- X$denom[subscripts]
panel.dotplot(x/denom, y, subscripts=subscripts, groups=groups, ...)
if(length(cex.values) && cex.values > 0) {
col <- if(length(groups)) trellis.par.get('superpose.symbol')$col
else trellis.par.get('dot.symbol')$col
longest.string <- paste(max(x), max(denom), sep='/ ')
length.longest <- unit(1, 'strwidth', longest.string)
xpos <- unit(1, 'npc') - unit(1, 'mm')
txt <- if(length(groups)) {
groups <- groups[subscripts]
tx <- ''
ig <- 0
xpos <- xpos - length(levels(groups)) * length.longest
for(g in levels(groups)) {
ig <- ig + 1
i <- groups == g
fr <- paste(x[i], denom[i], sep='/')
xpos <- xpos + length.longest
grid.text(fr, xpos, unit(y, 'native') - unit(1, 'mm'),
just=c('right','top'), gp=gpar(cex=cex.values, col=col[ig]))
}
}
else {
fr <- paste(x, denom, sep='/')
grid.text(fr, xpos, unit(y, 'native') - unit(1, 'mm'),
gp=gpar(cex=cex.values, col=col[1]), just=c('right','top'))
}
}
}
scal <- list(y='free', rot=0)
scal$x <- if(length(text.at)) {
at <- pretty(xlim)
list(limits=range(c(xlim, text.at)), at=at[at >= -0.0001 & at <= 1.0001])
} else list(limits=xlim)
d <- if(!length(groups))
dotplot(form, data=X, scales=scal, panel=pan,
xlab='Proportion', ...)
else eval(parse(text=
sprintf("dotplot(form, groups=%s, data=X, scales=scal, panel=pan, auto.key=key, xlab='Proportion', ...)", groups) ))
# if(outerlabels && ((nX - length(groups) + 1 == 2) ||
# length(dim(d)) == 2)) d <- useOuterStrips(d)
if(length(dim(d)) == 2) d <- useOuterStrips(d)
## Avoid wasting space for vertical variables with few levels
if(condvar[length(condvar)] == 'var') {
vars <- levels(X$var)
nv <- length(vars)
h <- integer(nv)
for(i in 1 : nv) h[i] <- length(unique((X$val[X$var == vars[i]])))
d <- resizePanels(d, h = h + 1)
}
d
}
latex.summaryP <- function(object, groups=NULL, file='', round=3,
size=NULL, append=TRUE, ...) {
class(object) <- 'data.frame'
if(! append) cat('', file=file)
p <- ifelse(object$denom == 0, '',
format(round(object$freq / object$denom, round)))
object$y <- paste(p, ' {\\scriptsize$\\frac{',
format(object$freq), '}{', format(object$denom),
'}$}', sep='')
object$freq <- object$denom <- NULL
stratvar <- setdiff(names(object), c('var', 'val', 'y', groups))
svar <- if(! length(stratvar)) as.factor(rep('', nrow(object)))
else {
if(length(stratvar) == 1) object[[stratvar]]
else do.call('interaction', list(object[stratvar], sep=' '))
}
object$stratvar <- svar
object <- object[, c('var', 'val', 'y', groups, 'stratvar')]
nl <- 0
slev <- levels(svar)
nslev <- length(slev)
for(i in 1 : nslev) {
if(nslev > 1) cat('\n\\vspace{1ex}\n\n\\textbf{', slev[i],
'}\n\\vspace{1ex}\n\n', sep='', file=file, append=TRUE)
x <- object[svar == slev[i], colnames(object) != 'stratvar']
if(length(groups)) {
r <- reshape(x, timevar=groups, direction='wide',
idvar=c('var', 'val'))
## reshape does not respect order of levels of factor variables; reorder
lev <- levels(x[[groups]])
r <- r[c('var', 'val', paste('y', lev, sep='.'))]
nl <- length(lev)
var <- unique(as.character(r$var))
w <- latex(r[colnames(r) != 'var'],
table.env=FALSE, file=file, append=TRUE,
rowlabel='', rowname=rep('', nrow(r)),
rgroup=levels(r$var), n.rgroup=as.vector(table(r$var)),
size=size,
colheads=c(' ', lev),
center='none')
}
else {
w <- latex(x[colnames(x) != 'var'],
table.env=FALSE, file=file, append=TRUE,
rowlabel='', rowname=rep('', nrow(x)),
rgroup=levels(x$var), n.rgroup=as.vector(table(x$var)),
size=size, colheads=c(' ', ' '), center='none')
}
}
attr(w, 'ngrouplevels') <- nl
w
}
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