names.hdd | R Documentation |
Gets the variable names of a hard drive data set (HDD).
## S3 method for class 'hdd'
names(x)
x |
A |
A character vector.
Laurent Berge
See hdd
, sub-.hdd
and cash-.hdd
for the extraction and manipulation of out of memory data. For importation of
HDD data sets from text files: see txt2hdd
.
See hdd_slice
to apply functions to chunks of data (and create
HDD objects) and hdd_merge
to merge large files.
To create/reshape HDD objects from memory or from other HDD objects, see
write_hdd
.
To display general information from HDD objects: origin
,
summary.hdd
, print.hdd
,
dim.hdd
and names.hdd
.
# Toy example with iris data
iris_path = tempfile()
fwrite(iris, iris_path)
# destination path
hdd_path = tempfile()
# reading the text file with 50 rows chunks:
txt2hdd(iris_path, dirDest = hdd_path, rowsPerChunk = 50)
# creating a HDD object
base_hdd = hdd(hdd_path)
# Summary information on the whole data set
summary(base_hdd)
# Looking at it like a regular data.frame
print(base_hdd)
dim(base_hdd)
names(base_hdd)
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.