xVisInterp | R Documentation

## Function to visualise interpolated irregular data

### Description

`xVisInterp` is supposed to visualise irregular data after bilinear or bicubic spline interpolation onto a grid.

### Usage

    xVisInterp(ls_xyz, interpolation = c("spline", "linear"), nx = 100,
    ny = 100, zlim = NULL, nD = c("auto", "2D", "3D"), colkey = TRUE,
    contour = FALSE, image = FALSE, clab = c("Value", ""), nlevels = 20,
    colormap = "terrain", label.pch = 17, label.text.cex = 0.8,
    label.text.adj = -0.4, label.text.adj.z = 0.01,
    label.font.family = "sans", xy.swap = FALSE, theta.3D = 40,
    phi.3D = 20, verbose = TRUE)

### Arguments

`ls_xyz` | a list with 3 required components (x, y and z) and an optional component (label)
`interpolation` | the method for the interpolation. It can be "linear" or "spline" interpolation
`nx` | the dimension of output grid in x direction
`ny` | the dimension of output grid in y direction
`zlim` | the minimum and maximum z values, defaulting to the range of the finite values of z
`nD` | an integer specifying the dimension of the visualisation. It can be one of '2D', '3D', and 'auto' (to display the input raw data as well in 2D)

`colkey`

a logical (TRUE by default) or a 'list' with parameters for the color key (legend). List parameters should be one of 'side, plot, length, width, dist, shift, addlines, col.clab, cex.clab, side.clab, line.clab, adj.clab, font.clab'. The defaults for the parameters are 'side=4, plot=TRUE, length=1, width=1, dist=0, shift=0, addlines=FALSE, col.clab=NULL, cex.clab=par("cex.lab"), side.clab=NULL, line.clab=NULL, adj.clab=NULL, font.clab=NULL'. colkey=list(side=4,length=0.15,width=0.5,shift=0.35,dist=-0.15,cex.axis=0.6,cex.clab=0.8,side.clab=3)

`contour` | a logical (FALSE by default) or a 'list' with parameters for the contour function. An optional parameter to this 'list' is the 'side' where the image should be plotted. Allowed values for 'side' are a z-value, or 'side = "zmin", "zmax"', for positioning at bottom or top respectively. The default is to put the image at the bottom
`image` | a logical (FALSE by default) or a 'list' with parameters for the image2D function. An optional parameter to this 'list' is the 'side' where the image should be plotted. Allowed values for 'side' are a z-value, or 'side = "zmin", "zmax"', for positioning at bottom or top respectively. The default is to put the image at the bottom
`clab` | a title for the colorbar. the label to be written on top of the color key; to lower it, 'clab' can be made a vector, with the first values empty strings.
`nlevels` | the number of levels to partition the input matrix values. The same level has the same color mapped to

`colormap`

short name for the colormap. It can be one of "jet" (jet colormap), "bwr" (blue-white-red colormap), "gbr" (green-black-red colormap), "wyr" (white-yellow-red colormap), "br" (black-red colormap), "yr" (yellow-red colormap), "wb" (white-black colormap), and "rainbow" (rainbow colormap, that is, red-yellow-green-cyan-blue-magenta). Alternatively, any hyphen-separated HTML color names, e.g. "blue-black-yellow", "royalblue-white-sandybrown", "darkgreen-white-darkviolet". A list of standard color names can be found in http://html-color-codes.info/color-names

`label.pch` | a numeric value specifying the graphiics symbol (by default, 17 for upward triangle). This argument only works when the labelling is enabled
`label.text.cex` | a numeric value specifying the text size. This argument only works when the labelling is enabled
`label.text.adj` | a numeric value adjusting the text location in xy-plane. This argument only works when the labelling is enabled
`label.text.adj.z` | a numeric value adjusting the text locaion in z-axis. This argument only works when the labelling is enabled
`label.font.family` | the font family for texts. This argument only works when the labelling is enabled
`xy.swap` | logical to indicate whether to wrap x and y. By default, it sets to false
`theta.3D` | the azimuthal direction. By default, it is 40
`phi.3D` | the colatitude direction. By default, it is 20
`verbose` | logical to indicate whether the messages will be displayed in the screen. By default, it sets to true for display

### Value

invisible

### Note

none

### See Also

`xVisInterp`

### Examples

    ## Not run:
    library(XGR)

    ## End(Not run)
    RData.location <- "http://galahad.well.ox.ac.uk/bigdata"
    ## Not run:
    g <- erdos.renyi.game(20, 1/10)
    glayout <- layout_with_kk(g)
    ls_xyz <- data.frame(x=glayout[,1], y=glayout[,2], z=degree(g),
    label=degree(g))

    # auto
    ls_xyz.smooth <- xVisInterp(ls_xyz, nD="auto")
    # 2D
    ls_xyz.smooth <- xVisInterp(ls_xyz, nD="2D")
    # 3D
    xVisInterp(ls_xyz, nD="3D", theta.3D=40, phi.3D=20, clab="Value\n")
    # 3D views of different angles
    pdf("xVisInterp.pdf")
    for(theta.3D in seq(0,360,10)){ xVisInterp(ls_xyz, nD="3D",
    contour=TRUE, image=TRUE, clab=paste0("theta:",theta.3D,"\n"),
    theta.3D=theta.3D, phi.3D=20)}
    dev.off()

    ## End(Not run)