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### Read PHYLIP file.
### Return a list contains
### nseq: Number of sequence.
### seqlen: Sequence length.
### seqname: Sequence's name.
### org: Original sequence in nid. array[nseq, nsite]
read.phylip.format <- function(filename, byrow = TRUE, sep = ""){
ret <- list(code.type = "UNKNOWN", info = NULL, nseq = NULL,
seqlen = NULL, seqname = NULL, org.code = NULL, org = NULL,
byrow = byrow, aligned = TRUE)
### Read header.
ret$info <- readLines(filename, n = 1)
tmp <- unstrsplit(ret$info, " ")
tmp <- tmp[tmp != ""]
ret$nseq <- as.numeric(tmp[1])
ret$seqlen <- as.numeric(tmp[2])
### Read data and transfer to nid.
op.org <- options("stringsAsFactors")
options(stringsAsFactors = FALSE)
tmp <- read.table(filename, sep = "", quote = "", skip = 1, fill = TRUE,
colClasses = "character")
options(op.org)
### Split the data by reading blocks and rejoin them by sequences.
if(nrow(tmp) != ret$nseq){
stop(paste("ndata=", nrow(tmp), ", nseq=", ret$nseq, sep = ""))
}
ret$org.code <- split(tmp, gl(nrow(tmp) / ret$nseq, ret$nseq))
ret$org.code <- do.call("cbind", ret$org.code)
ret$org.code <- as.matrix(ret$org.code, nrow = ret$nseq)
ret$seqname <- ret$org.code[, 1]
ret$org.code <- apply(as.matrix(ret$org.code[, -1], nrow = ret$nseq), 1,
function(y){ unstrsplit(y, sep) })
if(byrow){
ret$org.code <- matrix(ret$org.code, nrow = ret$nseq,
ncol = ret$seqlen, byrow = byrow)
} else{
ret$org.code <- matrix(ret$org.code, ncol = ret$nseq,
nrow = ret$seqlen, byrow = byrow)
}
ret$org <- ret$org.code
class(ret) <- "seq.data"
ret
} # End of read.phylip.format().
write.phylip.format <- function(seqdata, filename, classid = NULL,
seqname = NULL, width.seqname = 10, width.line = 60, sep = ""){
# add.space = 10){
n.seq <- nrow(seqdata)
tl.seq <- ncol(seqdata)
if(is.null(seqname)){
seqname <- as.character(1:n.seq)
}
if(!is.null(classid)){
seqname <- cbind(seqname, rep("-", n.seq) , classid)
seqname <- apply(seqname, 1, paste, collapse = "")
}
tmp.seqname <- strsplit(seqname, "")
for(i in 1:n.seq){
tl <- length(tmp.seqname[[i]])
if(tl > width.seqname){
tmp.seqname[[i]] <- paste(tmp.seqname[[i]][1:width.seqname],
collapse = "")
} else{
tmp.seqname[[i]] <- paste(c(tmp.seqname[[i]],
rep(" ", width.seqname - tl)), collapse = "")
}
}
tmp.seqname <- do.call("c", tmp.seqname)
tmp.space <- rep(paste(rep(" ", width.seqname), collapse = ""),
length(tmp.seqname))
head <- paste(n.seq, tl.seq, collapse = " ")
write(head, file = filename)
# my.paste <- function(x, collapse, add.space){
# tl.x <- length(x)
# x.new <- NULL
# tl.segment <- ceiling(tl.x / add.space)
# for(i in 1:tl.segment){
# get.range <- (i - 1) * add.space + 1:add.space
# x.new <- c(x.new,
# paste(x[get.range[get.range <= tl.x]], collapse = collapse))
# }
# paste(x.new, collapse = " ")
# }
tl.show <- ceiling(tl.seq / width.line)
for(i in 1:tl.show){
show.range <- (1:width.line) + (i - 1) * width.line
if(show.range[width.line] > tl.seq){
show.range <- show.range[1:which(show.range == tl.seq)]
}
# tmp.seqdata <- apply(matrix(seqdata[, show.range], nrow = n.seq), 1,
# my.paste, collapse = sep, add.space = add.space)
tmp.seqdata <- apply(matrix(seqdata[, show.range], nrow = n.seq), 1,
paste, collapse = sep)
if(i == 1){
tmp.seqdata <- cbind(tmp.seqname, tmp.seqdata)
} else{
tmp.seqdata <- cbind(tmp.space, tmp.seqdata)
}
tmp.seqdata <- apply(tmp.seqdata, 1, paste, collapse = "")
write.table(tmp.seqdata, file = filename, append = TRUE, col.names = FALSE,
row.names = FALSE, sep = "", quote = FALSE)
write("", file = filename, append = TRUE)
}
} # End of write.phylip.format().
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