readmode.gdsn: Switch to read mode in the compression settings
In gdsfmt: R Interface to CoreArray Genomic Data Structure (GDS) Files

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

Switch to read mode for a GDS node with respect to its compression settings.

1	readmode.gdsn(node)

node

an object of class gdsn.class, a GDS node

After the compressed data field is created, it is in writing mode. Users can add new data to the compressed data field, but can not read data from the data field. Users have to call readmode.gdsn to finish writing, before reading any data from the compressed data field.

Once switch to the read mode, users can not add more data to the data field. If users would like to append more data or modify the data field, please call compression.gdsn(node, compress="") to decompress data first.

Return node.

Xiuwen Zheng

http://github.com/zhengxwen/gdsfmt

compression.gdsn, add.gdsn

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

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

# you can not read the variable "int" because of writing mode
# read.gdsn(n)

readmode.gdsn(n)

# now you can read "int"
read.gdsn(n)

# close the GDS file
closefn.gds(f)


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