2012-03-13 42 views

答えて

9

あなたはペア機能を鍛えることができます。 コードを見ると、2つのネストされたfor-loops(行と列は1つ)内に軸が描画されます:

ここでは、私はlocalAxisこれらのforループ:

pairs2 <- 
    function (x, labels, panel = points, ..., lower.panel = panel, 
      upper.panel = panel, diag.panel = NULL, text.panel = textPanel, 
      label.pos = 0.5 + has.diag/3, cex.labels = NULL, font.labels = 1, 
      row1attop = TRUE, gap = 1) 
    { 
    textPanel <- function(x = 0.5, y = 0.5, txt, cex, font) text(x, 
                   y, txt, cex = cex, font = font) 
    localAxis <- function(side, x, y, xpd, bg, col = NULL, main, 
          oma, ...) { 
     if (side%%2 == 1) 
     Axis(x, side = side, xpd = NA, ...) 
     else Axis(y, side = side, xpd = NA, ...) 
    } 
    localPlot <- function(..., main, oma, font.main, cex.main) plot(...) 
    localLowerPanel <- function(..., main, oma, font.main, cex.main) lower.panel(...) 
    localUpperPanel <- function(..., main, oma, font.main, cex.main) upper.panel(...) 
    localDiagPanel <- function(..., main, oma, font.main, cex.main) diag.panel(...) 
    dots <- list(...) 
    nmdots <- names(dots) 
    if (!is.matrix(x)) { 
     x <- as.data.frame(x) 
     for (i in seq_along(names(x))) { 
     if (is.factor(x[[i]]) || is.logical(x[[i]])) 
      x[[i]] <- as.numeric(x[[i]]) 
     if (!is.numeric(unclass(x[[i]]))) 
      stop("non-numeric argument to 'pairs'") 
     } 
    } 
    else if (!is.numeric(x)) 
     stop("non-numeric argument to 'pairs'") 
    panel <- match.fun(panel) 
    if ((has.lower <- !is.null(lower.panel)) && !missing(lower.panel)) 
     lower.panel <- match.fun(lower.panel) 
    if ((has.upper <- !is.null(upper.panel)) && !missing(upper.panel)) 
     upper.panel <- match.fun(upper.panel) 
    if ((has.diag <- !is.null(diag.panel)) && !missing(diag.panel)) 
     diag.panel <- match.fun(diag.panel) 
    if (row1attop) { 
     tmp <- lower.panel 
     lower.panel <- upper.panel 
     upper.panel <- tmp 
     tmp <- has.lower 
     has.lower <- has.upper 
     has.upper <- tmp 
    } 
    nc <- ncol(x) 
    if (nc < 2) 
     stop("only one column in the argument to 'pairs'") 
    has.labs <- TRUE 
    if (missing(labels)) { 
     labels <- colnames(x) 
     if (is.null(labels)) 
     labels <- paste("var", 1L:nc) 
    } 
    else if (is.null(labels)) 
     has.labs <- FALSE 
    oma <- if ("oma" %in% nmdots) 
     dots$oma 
    else NULL 
    main <- if ("main" %in% nmdots) 
     dots$main 
    else NULL 
    if (is.null(oma)) { 
     oma <- c(4, 4, 4, 4) 
     if (!is.null(main)) 
     oma[3L] <- 6 
    } 
    opar <- par(mfrow = c(nc, nc), mar = rep.int(gap/2, 4), oma = oma) 
    on.exit(par(opar)) 
    dev.hold() 
    on.exit(dev.flush(), add = TRUE) 
    for (i in if (row1attop) 
     1L:nc 
     else nc:1L) for (j in 1L:nc) { 
      localPlot(x[, j], x[, i], xlab = "", ylab = "", axes = FALSE, 
        type = "n", ...) 
      if (i == j || (i < j && has.lower) || (i > j && has.upper)) { 
      box() 
      # edited here... 
      #   if (i == 1 && (!(j%%2) || !has.upper || !has.lower)) 
      #   localAxis(1 + 2 * row1attop, x[, j], x[, i], 
      #      ...) 
      # draw x-axis 
      if (i == nc & j != nc) 
       localAxis(1, x[, j], x[, i], 
         ...) 
      # draw y-axis 
      if (j == 1 & i != 1) 
       localAxis(2, x[, j], x[, i], ...) 
      #   if (j == nc && (i%%2 || !has.upper || !has.lower)) 
      #    localAxis(4, x[, j], x[, i], ...) 
      mfg <- par("mfg") 
      if (i == j) { 
       if (has.diag) 
       localDiagPanel(as.vector(x[, i]), ...) 
       if (has.labs) { 
       par(usr = c(0, 1, 0, 1)) 
       if (is.null(cex.labels)) { 
        l.wid <- strwidth(labels, "user") 
        cex.labels <- max(0.8, min(2, 0.9/max(l.wid))) 
       } 
       text.panel(0.5, label.pos, labels[i], cex = cex.labels, 
          font = font.labels) 
       } 
      } 
      else if (i < j) 
       localLowerPanel(as.vector(x[, j]), as.vector(x[, 
                   i]), ...) 
      else localUpperPanel(as.vector(x[, j]), as.vector(x[, 
                   i]), ...) 
      if (any(par("mfg") != mfg)) 
       stop("the 'panel' function made a new plot") 
      } 
      else par(new = FALSE) 
     } 
    if (!is.null(main)) { 
     font.main <- if ("font.main" %in% nmdots) 
     dots$font.main 
     else par("font.main") 
     cex.main <- if ("cex.main" %in% nmdots) 
     dots$cex.main 
     else par("cex.main") 
     mtext(main, 3, 3, TRUE, 0.5, cex = cex.main, font = font.main) 
    } 
    invisible(NULL) 
    } 
data(iris) 
pairs2(iris[1:4], main = "Anderson's Iris Data -- 3 species",pch = 21, bg = c("red", "green3", "blue")[unclass(iris$Species)]) 

enter image description here

編集 変更pairs2()、軸は、下側の対角線上に現れることになります。

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