contourLinesR: Get Contour Lines (list)
In contoureR: Contouring of Non-Regular Three-Dimensional Data

Description Usage Arguments Details Value See Also Examples

View source: R/contourLines.R

A wrapper to the getContourLines function, provided to ease the transition from the contourLines function as part of grDevices

1 2	contourLinesR(x, y, z, nlevels = 10, levels = pretty(range(z, na.rm = TRUE)), ...)

`x`	Numeric data for x and y coordinate, a single matrix or data-frame object can be provided for `x`, which will be used in preference to the y and z arguments. These do NOT need to be in any particular order nor do they need to be regular.
`y`	Numeric data for x and y coordinate, a single matrix or data-frame object can be provided for `x`, which will be used in preference to the y and z arguments. These do NOT need to be in any particular order nor do they need to be regular.
`z`	numeric Data for z coordinate (the coordinate to model)
`nlevels`	An integer number of bins to split the data into iff `levels` or `binwidth` have not been specified.
`levels`	A numeric vector of the explicitly specified levels (z values) to contour, by specifying this argument, it will override `nlevels` and/or `binwidth`. If this argument is provided, the stacking order of the contours will be preserved in the order of first occurence within the supplied vector.
`...`	any other parameters passed through to `getContourLines`

This function returns data in the same format/structure as contourLines, ie, list of lists, which is different from the (preferred) dataframe object returned by the getContourLines function as part of the present work.

A list of contours is returned, Each contour is a list with the elements:

`level`	The contour of the level
`x`	The x-coordinates of the contour
`y`	The y-coordinates of the contour

getContourLines

1 2 3 4 5 6 7	library(contoureR) library(ggplot2) x = runif(100) y = runif(100) df = expand.grid(x=x,y=y) z = with(df,x+y) result = contourLinesR(df$x,df$y,z)