Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

[R-package] allow construction of Dataset from CSV without header (fixes #4553) #4554

Merged
merged 1 commit into from
Aug 25, 2021
Merged

[R-package] allow construction of Dataset from CSV without header (fixes #4553) #4554

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 0 additions & 10 deletions R-package/R/lgb.Dataset.R
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -170,16 +170,6 @@ Dataset <- R6::R6Class(

}

# Check has header or not
has_header <- FALSE
if (!is.null(private$params$has_header) || !is.null(private$params$header)) {
params_has_header <- tolower(as.character(private$params$has_header)) == "true"
params_header <- tolower(as.character(private$params$header)) == "true"
if (params_has_header || params_header) {
has_header <- TRUE
}
}

# Generate parameter str
params_str <- lgb.params2str(params = private$params)

Expand Down
42 changes: 42 additions & 0 deletions R-package/tests/testthat/test_dataset.R
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -310,3 +310,45 @@ test_that("lgb.Dataset: should be able to use and retrieve long feature names",
expect_equal(col_names[1L], long_name)
expect_equal(nchar(col_names[1L]), 1000L)
})

test_that("lgb.Dataset: should be able to create a Dataset from a text file with a header", {
train_file <- tempfile(pattern = "train_", fileext = ".csv")
write.table(
data.frame(y = rnorm(100L), x1 = rnorm(100L), x2 = rnorm(100L))
, file = train_file
, sep = ","
, col.names = TRUE
, row.names = FALSE
, quote = FALSE
)

dtrain <- lgb.Dataset(
data = train_file
, params = list(header = TRUE)
)
dtrain$construct()
expect_identical(dtrain$get_colnames(), c("x1", "x2"))
expect_identical(dtrain$get_params(), list(header = TRUE))
expect_identical(dtrain$dim(), c(100L, 2L))
})

test_that("lgb.Dataset: should be able to create a Dataset from a text file without a header", {
train_file <- tempfile(pattern = "train_", fileext = ".csv")
write.table(
data.frame(y = rnorm(100L), x1 = rnorm(100L), x2 = rnorm(100L))
, file = train_file
, sep = ","
, col.names = FALSE
, row.names = FALSE
, quote = FALSE
)

dtrain <- lgb.Dataset(
data = train_file
, params = list(header = FALSE)
)
dtrain$construct()
expect_identical(dtrain$get_colnames(), c("Column_0", "Column_1"))
expect_identical(dtrain$get_params(), list(header = FALSE))
expect_identical(dtrain$dim(), c(100L, 2L))
})