R/plots-filled_contour.R

In konradmayer/trlboku: Tree Ring Lab BOKU - a lab internal R function collection

#filled_contour-----------------------------------------------------------------
#' @title filled_contour
#' @description mostly the same as \code{\link[graphics]{filled.contour}},
#'   \code{border = 0} is set in \code{rect()} as advised at \url{http://stackoverflow.com/questions/8068366/removing-lines-within-filled-contour-legend}
#' @param x,y,z,xlim,ylim,zlim,levels,nlevels,color.palette,col,plot.title,plot.axes,key.title,key.axes,asp,xaxs,yaxs,las,axes,frame.plot,... refer to the documentation of the original function \code{\link[graphics]{filled.contour}}.
#' @export
filled_contour <- function (x = seq(0, 1, length.out = nrow(z)),
                            y = seq(0, 1, length.out = ncol(z)), z,
                            xlim = range(x, finite = TRUE),
                            ylim = range(y, finite = TRUE),
                            zlim = range(z, finite = TRUE),
                            levels = pretty(zlim, nlevels),
                            nlevels = 20, color.palette = cm.colors,
                            col = color.palette(length(levels) - 1),
                            plot.title, plot.axes, key.title, key.axes,
                            asp = NA, xaxs = "i", yaxs = "i", las = 1,
                            axes = TRUE, frame.plot = axes, ...) {
  if (missing(z)) {
    if (!missing(x)) {
      if (is.list(x)) {
        z <- x$z
        y <- x$y
        x <- x$x
      }
      else {
        z <- x
        x <- seq.int(0, 1, length.out = nrow(z))
      }
    }
    else stop("no 'z' matrix specified")
  }
  else if (is.list(x)) {
    y <- x$y
    x <- x$x
  }
  if (any(diff(x) <= 0) || any(diff(y) <= 0))
    stop("increasing 'x' and 'y' values expected")
  mar.orig <- (par.orig <- par(c("mar", "las", "mfrow")))$mar
  on.exit(par(par.orig))
  w <- (3 + mar.orig[2L]) * par("csi") * 2.54
  layout(matrix(c(2, 1), ncol = 2L), widths = c(1, lcm(w)))
  par(las = las)
  mar <- mar.orig
  mar[4L] <- mar[2L]
  mar[2L] <- 1
  par(mar = mar)
  plot.new()
  plot.window(xlim = c(0, 1), ylim = range(levels), xaxs = "i",
              yaxs = "i")
  rect(0, levels[-length(levels)], 1, levels[-1L], col = col, border= NA)
  if (missing(key.axes)) {
    if (axes)
      axis(4)
  }
  else key.axes
  box()
  if (!missing(key.title))
    key.title
  mar <- mar.orig
  mar[4L] <- 1
  par(mar = mar)
  plot.new()
  plot.window(xlim, ylim, "", xaxs = xaxs, yaxs = yaxs, asp = asp)
  .filled.contour(x, y, z, levels, col)
  if (missing(plot.axes)) {
    if (axes) {
      title(main = "", xlab = "", ylab = "")
      Axis(x, side = 1)
      Axis(y, side = 2)
    }
  }
  else plot.axes
  if (frame.plot)
    box()
  if (missing(plot.title))
    title(...)
  else plot.title
  invisible()
}