Modifications to forestplot2 from package rmeta in R (CRAN)

gistfile1.txt

forestplot2 <- function (labeltext, mean, lower, upper, align = NULL, is.summary = FALSE, 
    clip = c(-Inf, Inf), xlab = "", zero = 0, graphwidth = unit(2, 
        "inches"), col = meta.colors(), xlog = FALSE, xticks = NULL, 
    boxsize = NULL, fontsize=5, xrange=NULL, add=FALSE, cgap = unit(8, "mm"), type="rect", ...) 
{
    require("grid") || stop("`grid' package not found")
    require("rmeta") || stop("`rmeta' package not found")
    drawNormalCI <- function(LL, OR, UL, size, boxcol, linecol, itype) {
      circle <- ifelse(itype == "circle", TRUE, FALSE)
        size = 0.75 * size
        clipupper <- convertX(unit(UL, "native"), "npc", valueOnly = TRUE) > 
            1
        cliplower <- convertX(unit(LL, "native"), "npc", valueOnly = TRUE) < 
            0
        box <- convertX(unit(OR, "native"), "npc", valueOnly = TRUE)
        clipbox <- box < 0 || box > 1
        if (clipupper || cliplower) {
            ends <- "both"
            lims <- unit(c(0, 1), c("npc", "npc"))
            if (!clipupper) {
                ends <- "first"
                lims <- unit(c(0, UL), c("npc", "native"))
            }
            if (!cliplower) {
                ends <- "last"
                lims <- unit(c(LL, 1), c("native", "npc"))
            }
            grid.lines(x = lims, y = 0.5, arrow = arrow(ends = ends, 
                length = unit(0.05, "inches")), gp = gpar(col = linecol))
            if (!clipbox) {                  
				if (circle) grid.circle(x = unit(OR, "native"), r = unit(size, "snpc"), gp = gpar(fill = boxcol, col = boxcol))                 
				else grid.rect(x = unit(OR, "native"), width = unit(size, 
                  "snpc"), height = unit(size, "snpc"), gp = gpar(fill = boxcol, 
                  col = boxcol))  
                }                
        }
        else {
            grid.lines(x = unit(c(LL, UL), "native"), y = 0.5, 
                gp = gpar(col = linecol))
            if (circle) grid.circle(x = unit(OR, "native"), r = unit(size, 
                "snpc"), gp = gpar(fill = boxcol, 
                col = boxcol))
            else grid.rect(x = unit(OR, "native"), width = unit(size, 
                "snpc"), height = unit(size, "snpc"), gp = gpar(fill = boxcol, 
                col = boxcol))
            if ((convertX(unit(OR, "native") + unit(0.5 * size, 
                "lines"), "native", valueOnly = TRUE) > UL) && 
                (convertX(unit(OR, "native") - unit(0.5 * size, 
                  "lines"), "native", valueOnly = TRUE) < LL)) 
                grid.lines(x = unit(c(LL, UL), "native"), y = 0.5, 
                  gp = gpar(col = linecol))
        }
    }
    drawSummaryCI <- function(LL, OR, UL, size) {
        grid.polygon(x = unit(c(LL, OR, UL, OR), "native"), y = unit(0.5 + 
            c(0, 0.5 * size, 0, -0.5 * size), "npc"), gp = gpar(fill = col$summary, 
            col = col$summary))
    }
    if (!add) plot.new()
#    print(labeltext)
    widthcolumn <- !apply(is.na(labeltext), 1, any)
    nc <- NCOL(labeltext)
    labels <- vector("list", nc)
    if (is.null(align)) 
        align <- c("l", rep("r", nc - 1))
    else align <- rep(align, length = nc)
    nr <- NROW(labeltext)
    is.summary <- rep(is.summary, length = nr)
    if (length(fontsize) == 1) fontsize <- rep(fontsize, nr) 
    if (length(col$text) == 1) col$text <- rep(col$text, nr)
    for (j in 1:nc) {
        labels[[j]] <- vector("list", nr)
        for (i in 1:nr) {
            if (is.na(labeltext[i, j])) 
                next
            x <- switch(align[j], l = 0, r = 1, c = 0.5)
            just <- switch(align[j], l = "left", r = "right", 
                c = "center")
            labels[[j]][[i]] <- textGrob(labeltext[i, j], x = x, 
                just = just, gp = gpar(fontface = if (is.summary[i]) 
                  "bold"
                else "plain", col = rep(col$text[i], length = nr)[i], fontsize=fontsize[i]))
        }
    }
#    print(labels[[1]][widthcolumn])
    colgap <- cgap
    colwidths <- unit.c(max(unit(rep(1, sum(widthcolumn)), "grobwidth", 
        labels[[1]][widthcolumn])), colgap)
    if (nc > 1) {
        for (i in 2:nc) colwidths <- unit.c(colwidths, max(unit(rep(1, 
            sum(widthcolumn)), "grobwidth", labels[[i]][widthcolumn])), 
            colgap)
    }
    # print(colwidths)
    colwidths <- unit.c(colwidths, graphwidth)
    # print(colwidths)
    pushViewport(viewport(layout = grid.layout(nr + 1, nc * 2 + 
        1, widths = colwidths, heights = unit(c(rep(1, nr), 0.5), 
        "lines"))))
    cwidth <- (upper - lower)
    if (is.null(xrange)) xrange <- c(max(min(lower, na.rm = TRUE), clip[1]), min(max(upper, 
        na.rm = TRUE), clip[2]))
    info <- 1/cwidth
    info <- info/max(info[!is.summary], na.rm = TRUE)
    info[is.summary] <- 1
    if (!is.null(boxsize)) 
        info <- rep(boxsize, length = length(info))
    for (j in 1:nc) {
        for (i in 1:nr) {
            if (!is.null(labels[[j]][[i]])) {
                pushViewport(viewport(layout.pos.row = i, layout.pos.col = 2 * 
                  j - 1))
                grid.draw(labels[[j]][[i]])
                popViewport()
            }
        }
    }
    pushViewport(viewport(layout.pos.col = 2 * nc + 1, xscale = xrange))
    grid.lines(x = unit(zero, "native"), y = 0:1, gp = gpar(col = col$zero))
    if (xlog) {
        if (is.null(xticks)) {
            ticks <- pretty(exp(xrange))
            ticks <- ticks[ticks > 0]
        }
        else {
            ticks <- xticks
        }
        if (length(ticks)) {
            if (min(lower, na.rm = TRUE) < clip[1]) 
                ticks <- c(exp(clip[1]), ticks)
            if (max(upper, na.rm = TRUE) > clip[2]) 
                ticks <- c(ticks, exp(clip[2]))
            xax <- xaxisGrob(gp = gpar(cex = 0.6, col = col$axes), 
                at = log(ticks), name = "xax")
            xax1 <- editGrob(xax, gPath("labels"), label = format(ticks, 
                digits = 2))
            grid.draw(xax1)
        }
    }
    else {
        if (is.null(xticks)) {
            grid.xaxis(gp = gpar(cex = 0.6, col = col$axes))
        }
        else if (length(xticks)) {
            grid.xaxis(at = xticks, gp = gpar(cex = 0.6, col = col$axes))
        }
    }
    grid.text(xlab, y = unit(-2, "lines"), gp = gpar(col = col$axes))
    # print(xlab)
    popViewport()
    if (length(col$box) == 1) col$box <- rep(col$box, nr)
    if (length(col$lines) == 1) col$lines <- rep(col$lines, nr)
    if (length(type) == 1) type <- rep(type, nr)    
    for (i in 1:nr) {
        if (is.na(mean[i])) 
            next
        pushViewport(viewport(layout.pos.row = i, layout.pos.col = 2 * 
            nc + 1, xscale = xrange))
        if (is.summary[i]) 
            drawSummaryCI(lower[i], mean[i], upper[i], info[i], col$box[i], col$lines[i], type[i])
        else drawNormalCI(lower[i], mean[i], upper[i], info[i], col$box[i], col$lines[i], type[i])
        popViewport()
    } 
    popViewport()
}
environment(forestplot2) <- as.environment("package:rmeta")