Nothing
"overlap" <-
function(modes, dv, nmodes=20) {
if(missing(modes))
stop("overlap: 'modes' must be prodivded")
if(missing(dv))
stop("overlap: 'dv' must be prodivded")
if ("pca" %in% class(modes)) {
ev <- modes$U
mass <- NULL
first.mode <- 1
}
else if("nma" %in% class(modes)) {
ev <- modes$modes
mass <- modes$mass
first.mode <- modes$triv.modes+1
nmodes <- modes$triv.modes + nmodes
}
else {
if(!inherits(modes, c("matrix", "pca.loadings")))
stop("overlap: 'modes' must be an object of type 'pca', 'nma', or 'matrix'")
ev <- modes
mass <- NULL
first.mode <- 1
}
if (nrow(ev)!=length(dv))
stop("overlap: unequal vector lengths")
if ( ncol(ev) < nmodes ) {
nmodes <- dim(ev)[2L]
warning("nmodes larger than dimensions of 'modes'")
}
inds <- seq(first.mode, nmodes)
ev <- ev[,inds]
## Normalize vectors - mass-weighted if normal modes are
ev <- normalize.vector(ev, mass)
dvn <- normalize.vector(dv, mass)
overlap.values <- inner.prod(ev, dvn, mass)**2
cum <- cumsum(overlap.values)
out <- list(overlap=overlap.values, overlap.cum=cum)
return(out)
}
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