3 ## Manipulations and Comparisons of DNA Sequences
5 ## Copyright 2002-2010 Emmanuel Paradis
7 ## This file is part of the R-package `ape'.
8 ## See the file ../COPYING for licensing issues.
10 labels.DNAbin <- function(object, ...)
12 if (is.list(object)) return(names(object))
13 if (is.matrix(object)) return(rownames(object))
17 del.gaps <- function(x)
19 deleteGaps <- function(x) {
21 if (length(i)) x[-i] else x
24 if (!inherits(x, "DNAbin")) x <- as.DNAbin(x)
27 y <- vector("list", n)
28 for (i in 1:n) y[[i]] <- x[i, ]
29 names(y) <- rownames(x)
33 if (!is.list(x)) return(deleteGaps(x))
34 x <- lapply(x, deleteGaps)
39 as.alignment <- function(x)
41 if (is.list(x)) n <- length(x)
42 if (is.matrix(x)) n <- dim(x)[1]
47 seq[i] <- paste(x[[i]], collapse = "")
50 nam <- dimnames(x)[[1]]
52 seq[i] <- paste(x[i, ], collapse = "")
54 obj <- list(nb = n, seq = seq, nam = nam, com = NA)
55 class(obj) <- "alignment"
59 "[.DNAbin" <- function(x, i, j, drop = FALSE)
64 if (nargs() == 2 && !missing(i)) ans <- x[i]
67 if (missing(i)) i <- 1:nd[1]
68 if (missing(j)) j <- 1:nd[2]
69 ans <- x[i, j, drop = drop]
72 if (missing(i)) i <- 1:length(x)
79 as.matrix.DNAbin <- function(x, ...)
82 if (length(unique(unlist(lapply(x, length)))) != 1)
83 stop("DNA sequences in list not of the same length.")
87 x <- matrix(unlist(x), n, s, byrow = TRUE)
94 rbind.DNAbin <- function(...)
95 ### works only with matrices for the moment
99 if (n == 1) return(obj[[1]])
101 if (!is.matrix(obj[[1]]))
102 stop("the 'rbind' method for \"DNAbin\" accepts only matrices")
103 NC <- unlist(lapply(obj, ncol))
104 if (length(unique(NC)) > 1)
105 stop("matrices do not have the same number of columns.")
106 for (i in 1:n) class(obj[[i]]) <- NULL
107 for (i in 2:n) obj[[1]] <- rbind(obj[[1]], obj[[i]])
108 structure(obj[[1]], class = "DNAbin")
112 function(..., check.names = TRUE, fill.with.gaps = FALSE,
114 ### works only with matrices for the moment
118 if (n == 1) return(obj[[1]])
120 if (!is.matrix(obj[[1]]))
121 stop("the 'cbind' method for \"DNAbin\" accepts only matrices")
122 NR <- unlist(lapply(obj, nrow))
123 for (i in 1:n) class(obj[[i]]) <- NULL
125 nms <- unlist(lapply(obj, rownames))
126 if (fill.with.gaps) {
127 NC <- unlist(lapply(obj, ncol))
129 ans <- matrix(as.raw(4), length(nms), sum(NC))
133 to <- from + NC[i] - 1
134 tmp <- rownames(obj[[i]])
135 nmsi <- tmp[tmp %in% nms]
136 ans[nmsi, from:to] <- obj[[i]][nmsi, , drop = FALSE]
142 nms <- names(tab)[which(ubi)]
143 ans <- obj[[1]][nms, , drop = FALSE]
145 ans <- cbind(ans, obj[[i]][nms, , drop = FALSE])
146 if (!quiet && !all(ubi))
147 warning("some rows were dropped.")
150 if (length(unique(NR)) > 1)
151 stop("matrices do not have the same number of rows.")
152 ans <- matrix(unlist(obj), NR)
153 rownames(ans) <- rownames(obj[[1]])
155 class(ans) <- "DNAbin"
159 c.DNAbin <- function(..., recursive = FALSE)
161 if (!all(unlist(lapply(list(...), is.list))))
162 stop("the 'c' method for \"DNAbin\" accepts only lists")
163 structure(NextMethod("c"), class = "DNAbin")
166 print.DNAbin <- function(x, printlen = 6, digits = 3, ...)
172 cat("1 DNA sequence in binary format stored in a list.\n\n")
173 cat("Sequence length:", length(x[[1]]), "\n\n")
174 cat("Label:", nms, "\n\n")
176 cat(n, "DNA sequences in binary format stored in a list.\n\n")
177 tmp <- unlist(lapply(x, length))
181 cat("All sequences of same length:", maxi, "\n")
183 cat("Mean sequence length:", round(mean(tmp), 3), "\n")
184 cat(" Shortest sequence:", mini, "\n")
185 cat(" Longest sequence:", maxi, "\n")
189 nms <- nms[1:printlen]
192 cat("\nLabels:", paste(nms, collapse = " "), TAIL)
194 } else if (is.matrix(x)) {
197 cat(nd[1], "DNA sequences in binary format stored in a matrix.\n\n")
198 cat("All sequences of same length:", nd[2], "\n")
200 if (printlen < nd[1]) {
201 nms <- nms[1:printlen]
204 cat("\nLabels:", paste(nms, collapse = " "), TAIL)
206 cat("1 DNA sequence in binary format stored in a vector.\n\n")
207 cat("Sequence length:", length(x), "\n\n")
209 cat("Base composition:\n")
210 print(round(base.freq(x), digits))
213 as.DNAbin <- function(x, ...) UseMethod("as.DNAbin")
215 ._cs_<- letters[c(1, 7, 3, 20, 18, 13, 23, 19, 11, 25, 22, 8, 4, 2, 14)]
217 ._bs_<- c(136, 72, 40, 24, 192, 160, 144, 96, 80, 48, 224, 176, 208, 112, 240)
219 as.DNAbin.character <- function(x, ...)
224 ans[which(x == ._cs_[i])] <- as.raw(._bs_[i])
225 ans[which(x == "-")] <- as.raw(4)
226 ans[which(x == "?")] <- as.raw(2)
229 dimnames(ans) <- dimnames(x)
231 class(ans) <- "DNAbin"
235 as.DNAbin.alignment <- function(x, ...)
238 x$seq <- tolower(x$seq)
239 ans <- matrix("", n, nchar(x$seq[1]))
241 ans[i, ] <- strsplit(x$seq[i], "")[[1]]
242 rownames(ans) <- gsub(" +$", "", gsub("^ +", "", x$nam))
243 as.DNAbin.character(ans)
246 as.DNAbin.list <- function(x, ...)
248 obj <- lapply(x, as.DNAbin)
249 class(obj) <- "DNAbin"
253 as.character.DNAbin <- function(x, ...)
256 ans <- character(length(xx))
258 ans[which(xx == ._bs_[i])] <- ._cs_[i]
259 ans[which(xx == 4)] <- "-"
260 ans[which(xx == 2)] <- "?"
263 dimnames(ans) <- dimnames(xx)
267 if (is.list(x)) lapply(x, f) else f(x)
270 base.freq <- function(x, freq = FALSE)
272 if (is.list(x)) x <- unlist(x)
274 BF <- .C("BaseProportion", x, n, double(4), freq,
275 DUP = FALSE, NAOK = TRUE, PACKAGE = "ape")[[3]]
276 names(BF) <- letters[c(1, 3, 7, 20)]
280 GC.content <- function(x) sum(base.freq(x)[2:3])
282 seg.sites <- function(x)
284 if (is.list(x)) x <- as.matrix(x)
285 if (is.vector(x)) n <- 1
286 else { # 'x' is a matrix
291 if (n == 1) return(integer(0))
292 ans <- .C("SegSites", x, n, s, integer(s),
293 DUP = FALSE, NAOK = TRUE, PACKAGE = "ape")
294 which(as.logical(ans[[4]]))
297 dist.dna <- function(x, model = "K80", variance = FALSE, gamma = FALSE,
298 pairwise.deletion = FALSE, base.freq = NULL,
301 MODELS <- c("RAW", "JC69", "K80", "F81", "K81", "F84", "T92", "TN93",
302 "GG95", "LOGDET", "BH87", "PARALIN", "N")
303 imod <- pmatch(toupper(model), MODELS)
305 stop(paste("'model' must be one of:",
306 paste("\"", MODELS, "\"", sep = "", collapse = " ")))
307 if (imod == 11 && variance) {
308 warning("computing variance temporarily not available for model BH87.")
311 if (gamma && imod %in% c(1, 5:7, 9:12)) {
312 warning(paste("gamma-correction not available for model", model))
315 if (is.list(x)) x <- as.matrix(x)
316 nms <- dimnames(x)[[1]]
320 BF <- if (is.null(base.freq)) base.freq(x) else base.freq
321 if (!pairwise.deletion) {
322 keep <- .C("GlobalDeletionDNA", x, n, s,
323 rep(1L, s), PACKAGE = "ape")[[4]]
324 x <- x[, as.logical(keep)]
327 Ndist <- if (imod == 11) n*n else n*(n - 1)/2
328 var <- if (variance) double(Ndist) else 0
329 if (!gamma) gamma <- alpha <- 0
330 else alpha <- gamma <- 1
331 d <- .C("dist_dna", x, n, s, imod, double(Ndist), BF,
332 as.integer(pairwise.deletion), as.integer(variance),
333 var, as.integer(gamma), alpha, DUP = FALSE, NAOK = TRUE,
335 if (variance) var <- d[[9]]
339 dimnames(d) <- list(nms, nms)
342 attr(d, "Labels") <- nms
343 attr(d, "Diag") <- attr(d, "Upper") <- FALSE
344 attr(d, "call") <- match.call()
345 attr(d, "method") <- model
347 if (as.matrix) d <- as.matrix(d)
349 if (variance) attr(d, "variance") <- var