gdsfmt (version 1.8.3)

append.gdsn: Append data to a specified variable

Description

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

Usage

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

Arguments

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

Value

None.

Details

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 "".

References

http://github.com/zhengxwen/gdsfmt

See Also

read.gdsn, write.gdsn, add.gdsn

Examples

# 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)