plotGreyPatches: plotGreyPatches
In patchPlot: Scatterplots of image patches

Description Usage Arguments Value Author(s) See Also Examples

Draw a scatterplot with grey patches as placeholders for the points. Each patch may display two distinct grey nuances (upper left and bottom right halves).

1	plotGreyPatches(data, maingrey, auxgrey=NULL, patchSize=0.05, alpha=0.5, highlight=numeric(0), labels=rep("1", length(highlight)))

`data`	nx2 matrix of points positions in the 2D space.
`maingrey`	Vector of gray intensities in [0,1]
`auxgrey`	If NULL, each patch displays only 1 grey intensity. If not NULL, its length should match maingrey, so that maingrey[i] and auxgrey[i] are the 2 grey nuances displayed by the i-th patch
`patchSize`	patch size as a ratio of the whole window.
`alpha`	If highlight is empty, this is the alpha value for all patches. Else if a set is highlighted, highlighted elements have this alpha value, and other elements have alpha/20.
`highlight`	numeric vector taking values in 1..n, indicating elements in data to highlight. Patches are associated to alpha=1 if highlighted, 0.04 if not. If no highlight is specified, all patches have alpha=1.
`labels`	text labels associated to highlighted elements. Defauts to "1" for all highlighted elements.

NULL

Pierrick Bruneau

drawPatches

maingrey <- runif(20)
auxgrey <- runif(20)
xvals <- c(rnorm(20, -3), rnorm(20, 3))
yvals <- rnorm(40)
plotGreyPatches(cbind(xvals, yvals), maingrey, auxgrey) # with 2 nuances per patch
plotGreyPatches(cbind(xvals, yvals), maingrey) # only one nuance