## For multiplication operations, sparseMatrix overrides other method ## selections. Coerce a ddensematrix argument to a dgeMatrix. setMethod("%*%", signature(x = "dsparseMatrix", y = "ddenseMatrix"), function(x, y) callGeneric(x, as(y, "dgeMatrix"))) setMethod("%*%", signature(x = "ddenseMatrix", y = "dsparseMatrix"), function(x, y) callGeneric(as(x, "dgeMatrix"), y)) setMethod("crossprod", signature(x = "dsparseMatrix", y = "ddenseMatrix"), function(x, y = NULL) callGeneric(x, as(y, "dgeMatrix"))) setMethod("crossprod", signature(x = "ddenseMatrix", y = "dsparseMatrix"), function(x, y = NULL) callGeneric(as(x, "dgeMatrix"), y)) ## and coerce dsparse* to dgC* setMethod("%*%", signature(x = "dsparseMatrix", y = "dgeMatrix"), function(x, y) callGeneric(as(x, "dgCMatrix"), y)) setMethod("%*%", signature(x = "dgeMatrix", y = "dsparseMatrix"), function(x, y) callGeneric(x, as(y, "dgCMatrix"))) setMethod("crossprod", signature(x = "dsparseMatrix", y = "dgeMatrix"), function(x, y = NULL) callGeneric(as(x, "dgCMatrix"), y)) ## NB: there's already ## ("CsparseMatrix", "missing") and ("TsparseMatrix", "missing") methods setMethod("crossprod", signature(x = "dgeMatrix", y = "dsparseMatrix"), function(x, y = NULL) callGeneric(x, as(y, "dgCMatrix"))) setMethod("image", "dsparseMatrix", function(x, ...) image(as(x, "dgTMatrix"), ...)) ## Group Methods, see ?Arith (e.g.) ## ----- ## NOT YET (first need 'dgCMatrix' method): ## setMethod("Arith", ## "+", "-", "*", "^", "%%", "%/%", "/" ## signature(e1 = "dsparseMatrix", e2 = "dsparseMatrix"), ## function(e1, e2) callGeneric(as(e1, "dgCMatrix"), ## as(e2, "dgCMatrix"))) ## setMethod("Arith", ## signature(e1 = "dsparseMatrix", e2 = "numeric"), ## function(e1, e2) callGeneric(as(e1, "dgCMatrix"), e2)) ## setMethod("Arith", ## signature(e1 = "numeric", e2 = "dsparseMatrix"), ## function(e1, e2) callGeneric(e1, as(e2, "dgCMatrix"))) setMethod("Math", signature(x = "dsparseMatrix"), function(x) { r <- callGeneric(as(x, "dgCMatrix")) if(is(r, "dsparseMatrix")) as(r, class(x)) }) if(FALSE) ## unneeded with "Math2" in ./dMatrix.R setMethod("Math2", signature(x = "dsparseMatrix", digits = "numeric"), function(x, digits) { r <- callGeneric(as(x, "dgCMatrix"), digits = digits) if(is(r, "dsparseMatrix")) as(r, class(x)) }) ### cbind2 / rbind2 if(paste(R.version\$major, R.version\$minor, sep=".") >= "2.2") { ## for R 2.2.x (and later): ### cbind2 setMethod("cbind2", signature(x = "dsparseMatrix", y = "numeric"), function(x, y) { d <- dim(x); nr <- d[1]; nc <- d[2]; cl <- class(x) x <- as(x, "dgCMatrix") if(nr > 0) { y <- rep(y, length.out = nr) # 'silent procrustes' n0y <- y != 0 n.e <- length(x@i) x@i <- c(x@i, (0:(nr-1))[n0y]) x@p <- c(x@p, n.e + sum(n0y)) x@x <- c(x@x, y[n0y]) } else { ## nr == 0 } x@Dim[2] <- nc + 1:1 if(is.character(dn <- x@Dimnames[[2]])) x@Dimnames[[2]] <- c(dn, "") x }) ## the same, (x,y) <-> (y,x): setMethod("cbind2", signature(x = "numeric", y = "dsparseMatrix"), function(x, y) { d <- dim(y); nr <- d[1]; nc <- d[2]; cl <- class(y) y <- as(y, "dgCMatrix") if(nr > 0) { x <- rep(x, length.out = nr) # 'silent procrustes' n0x <- x != 0 y@i <- c((0:(nr-1))[n0x], y@i) y@p <- c(0:0, sum(n0x) + y@p) y@x <- c(x[n0x], y@x) } else { ## nr == 0 } y@Dim[2] <- nc + 1:1 if(is.character(dn <- y@Dimnames[[2]])) y@Dimnames[[2]] <- c(dn, "") y }) setMethod("cbind2", signature(x = "dsparseMatrix", y = "matrix"), function(x, y) callGeneric(x, as(y, "dgCMatrix"))) setMethod("cbind2", signature(x = "matrix", y = "dsparseMatrix"), function(x, y) callGeneric(as(x, "dgCMatrix"), y)) setMethod("cbind2", signature(x = "dsparseMatrix", y = "dsparseMatrix"), function(x, y) { nr <- rowCheck(x,y) ncx <- x@Dim[2] ncy <- y@Dim[2] ## beware of (packed) triangular, symmetric, ... hasDN <- !is.null(dnx <- dimnames(x)) | !is.null(dny <- dimnames(y)) x <- as(x, "dgCMatrix") y <- as(y, "dgCMatrix") ne.x <- length(x@i) x@i <- c(x@i, y@i) x@p <- c(x@p, ne.x + y@p[-1]) x@x <- c(x@x, y@x) x@Dim[2] <- ncx + ncy if(hasDN) { ## R and S+ are different in which names they take ## if they differ -- but there's no warning in any case rn <- if(!is.null(dnx[[1]])) dnx[[1]] else dny[[1]] cx <- dnx[[2]] ; cy <- dny[[2]] cn <- if(is.null(cx) && is.null(cy)) NULL else c(if(!is.null(cx)) cx else rep.int("", ncx), if(!is.null(cy)) cy else rep.int("", ncy)) x@Dimnames <- list(rn, cn) } x }) ### rbind2 -- analogous to cbind2 --- more to do for @x though: }## R-2.2.x ff