R: Examples for 'iotools::idstrsplit'

### ** Examples

col_names <- names(iris)
write.csv(iris, file="iris.csv", row.names=FALSE)
it <- idstrsplit("iris.csv", col_types=c(rep("numeric", 4), "character"),
                 sep=",")
# Get the elements
iris_read <- it$nextElem()[-1,]
# or with the iterators package
# nextElem(it)
names(iris_read) <- col_names
print(head(iris_read))

  Sepal.Length Sepal.Width Petal.Length Petal.Width  Species
2          5.1         3.5          1.4         0.2 "setosa"
3          4.9         3.0          1.4         0.2 "setosa"
4          4.7         3.2          1.3         0.2 "setosa"
5          4.6         3.1          1.5         0.2 "setosa"
6          5.0         3.6          1.4         0.2 "setosa"
7          5.4         3.9          1.7         0.4 "setosa"

## remove iterator, connections and files
rm("it")
gc(FALSE)

          used (Mb) gc trigger (Mb) max used (Mb)
Ncells  643298 34.4    1099998 58.8  1099998 58.8
Vcells 5445035 41.6   10146329 77.5  5588815 42.7

unlink("iris.csv")

Examples for 'iotools::idstrsplit'

Create an iterator for splitting binary or character input into a dataframe