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### emptyplot ###
#' @export
#' @name emptyplot
#' @aliases LSD.emptyplot
#' @title Wrapper function for an empty graphics device
#' @description Calls an empty graphics device with a coordinate system of choice.
#' @param xlim x limits, standard graphics parameter.
#' @param ylim y limits, standard graphics parameter.
#' @param ... additional parameters to be passed to points and plot.
#' @author Bjoern Schwalb
#' @seealso \code{\link{demotour}}
#' @examples emptyplot()
#' @keywords empty plotting region
emptyplot = function(xlim = c(-1,1),ylim = c(-1,1),...)
{
plot.new()
plot.window(xlim = xlim,ylim = ylim,...)
}
### alias ###
LSD.emptyplot = emptyplot
### windowxy ###
#' @export
#' @name windowxy
#' @aliases LSD.windowxy
#' @title Factorization of the number of windows for plots with device partitions
#' @description Create a factorization of the number of windows for plots with device partitions to be used in par(mfrow = ...).
#' @param nrwin a non-negative integer specifying the number of windows.
#' @author Bjoern Schwalb
#' @seealso \code{\link{demotour}}
#' @examples windowxy(20)
#' @keywords factorization
windowxy = function(nrwin = 1)
{
# factorize 'nrwin' #
flsq = floor(sqrt(nrwin))
if (flsq^2==nrwin){
fac = c(flsq,flsq)
} else if (nrwin <= flsq*(flsq+1)){
fac = c(flsq,flsq+1)
} else {
fac = c(flsq,flsq+2)
}
# return 'fac' #
return(fac)
}
### alias ###
LSD.windowxy = windowxy
### webdesign ###
#' @export
#' @name webdesign
#' @aliases LSD.webdesign
#' @title Colored rectangular grid
#' @description Adds a colored rectangular grid to an existing plot.
#' @param xlim x limits, standard graphics parameter.
#' @param ylim y limits, standard graphics parameter.
#' @param colpal a character vector containing R built-in color names or a name of a \code{LSD} colorpalette as a character string (see disco() or \code{\link{disco}}).
#' @param xlabels a character vector containing labels depicted parallel to the x-axis.
#' @param ylabels a character vector containing labels depicted parallel to the y-axis.
#' @param ... additional parameters to be passed to abline().
#' @author Bjoern Schwalb
#' @seealso \code{\link{demotour}}, \code{\link{disco}}, \code{\link{colorpalette}}
#' @examples emptyplot(c(-5,5),c(-5,5))
#' labels = c("2 fold","4 fold","8 fold")
#' webdesign(c(-5,5),c(-5,5),lty = 2,xlabels = labels,ylabels = labels)
#' @keywords grid web
webdesign = function(xlim,ylim,colpal = "rdbu",xlabels = NULL,ylabels = NULL,...)
{
# provide color encoding #
colpal = colorpalette(colpal,max(diff(xlim),diff(ylim))+1)
# add abscissa and ordinate #
abline(h=0,v=0,...)
# line segments along the x-axis #
xseq = xlim[2]:xlim[1]
abline(h=xseq,col=colpal,...)
# line segments along the y-axis #
yseq = ylim[2]:ylim[1]
abline(v=yseq,col=colpal,...)
# add labels if !NULL #
if (!is.null(xlabels)){text(1:length(ylabels),ylim[2]-1,xlabels,col=colpal[rev(which(yseq %in% 1:length(xlabels)))],adj=c(-0.1,-0.1))}
if (!is.null(ylabels)){text(xlim[1]+1,-(1:length(ylabels)),ylabels,col=colpal[which(xseq %in% -(1:length(ylabels)))],adj=c(-0.1,-0.1))}
}
### alias ###
LSD.webdesign = webdesign
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