append.gdsn: Append data to a specified variable
In gdsfmt: R Interface to CoreArray Genomic Data Structure (GDS) Files

Description Usage Arguments Details Value Author(s) References See Also Examples

Append new data to the data field of a GDS node.

1	append.gdsn(node, val, check=TRUE)

`node`	an object of class `gdsn.class`
`val`	R primitive data, like integer; or an object of class `gdsn.class`
`check`	whether a warning is given, when appended data can not match the capability of data field; if `val` is character-type, a warning will be shown if there is any `NA` in `val`

storage.mode(val) should be "integer", "double", "character" or "logical". GDS format does not support missing characters NA, and any NA will be converted to a blank string "".

None.

Xiuwen Zheng

http://github.com/zhengxwen/gdsfmt

read.gdsn, write.gdsn, add.gdsn

# cteate a GDS file
f <- createfn.gds("test.gds")

# commom types
n <- add.gdsn(f, "int", val=matrix(1:10000, nrow=100, ncol=100),
    compress="ZIP")

# no warning, and add a new column
append.gdsn(n, -1:-100)
f

# a warning
append.gdsn(n, -1:-50)
f

# no warning here, and add a new column
append.gdsn(n, -51:-100)
f

# you should call "readmode.gdsn" before reading, since compress="ZIP"
readmode.gdsn(n)

# check the last column
read.gdsn(n, start=c(1, 102), count=c(-1, 1))


# characters
n <- add.gdsn(f, "string", val=as.character(1:100))
append.gdsn(n, as.character(rep(NA, 25)))

read.gdsn(n)


# close the GDS file
closefn.gds(f)


# delete the temporary file
unlink("test.gds", force=TRUE)