This is a Rust library that allows users to grab csv text as formatted by the tv cli command line utility and use it as they see fit
fn main() {
// define path
let in_file_path: &str = "examples/data/uspop.csv";
// one liner
let vec_vec_str = tv_lib::print::read_csv(in_file_path);
//print
println!("{:?}", vec_vec_str[2][0..6].to_vec());
println!("{:?}", vec_vec_str[3][0..6].to_vec());
}
["Population", "NA", "7610", "NA", "NA", "NA"]
["Latitude", "65.2", "60.5", "33.7", "31.7", "32.3"]
In this small example see the features ported from tv.
- Missing values are filled with NA
- Latitude is normally a decimal that goes out 7 places! See that the sig figs are set to only show one significant digit.
Remember, the goal is tv is about data visualization. In any practical calculation it is important to have a long decimal for lat/lon?
Include in Cargo.toml
tv-lib = "0.1.0"
Examples may be run with cargo run --example <file in examples dir>
The following are available
cargo run --example short_read_csv
cargo run --example print_csv_from_str
cargo run --example format_csv_from_str
cargo run --example read_then_format_csv_from_str
cargo run --example read_then_print_csv_from_str
Some times it is too hard to want to go into a directory to copy and paste a chunk of code 😉.
fn main() {
// define path
let in_file_path: &str = "examples/data/uspop.csv";
// one liner
let vec_vec_str = tv_lib::print::read_csv(in_file_path);
//print
println!("{:?}", vec_vec_str);
}
// format_from_csv_str
fn main() {
let data = "\
City,State,Population,Latitude,Longitude
Davidsons Landing,AK,,65.2419444,-165.2716667
Kenai,AK,7610,60.5544444,-151.2583333
Oakman,AL,,33.7133333,-87.3886111";
let vec_vec_str = tv_lib::print::format_from_csv_str(data);
println!("{:?}",vec_vec_str)
}
// print_csv_from_str
fn main() {
let data = "\
City,State,Population,Latitude,Longitude
Davidsons Landing,AK,,65.2419444,-165.2716667
Kenai,AK,7610,60.5544444,-151.2583333
Oakman,AL,,33.7133333,-87.3886111";
tv_lib::print::print_from_csv_str(data);
}
use csv::Reader;
use csv::Writer;
use std::fs::File;
fn main() {
let in_file_path: &str = "examples/data/uspop.csv";
// csv::ReaderBuilder
let mut r: Reader<File> = csv::ReaderBuilder::new()
.has_headers(false)
.delimiter(b',')
.from_path(in_file_path)
.unwrap();
// Collect items in reader
let rdr = r
.records()
.into_iter()
.map(|x| x.expect("a csv record"))
.collect::<Vec<_>>();
// convert items to wtr
let rows: usize = rdr.len();
let mut wtr = Writer::from_writer(vec![]);
for row in 0..rows {
wtr.write_record(&rdr[row]).unwrap();
}
// convert wtr to string
let data = String::from_utf8(wtr.into_inner().unwrap()).unwrap();
// use tv_lib: print_from_csv_str
let vec_vec_str = tv_lib::print::format_from_csv_str(data.as_str());
println!("{:?}", vec_vec_str[1][0..6].to_vec());
println!("{:?}", vec_vec_str[1][0..6].to_vec());
println!("{:?}", vec_vec_str[2][0..6].to_vec());
println!("{:?}", vec_vec_str[3][0..6].to_vec());
println!("{:?}", vec_vec_str[4][0..6].to_vec());
}
use csv::Reader;
use csv::Writer;
use std::fs::File;
fn main() {
// path
let in_file_path: &str = "examples/data/uspop.csv";
// csv::ReaderBuilder
let mut r: Reader<File> = csv::ReaderBuilder::new()
.has_headers(false)
.delimiter(b',')
.from_path(in_file_path)
.unwrap();
// Collect items in reader
let rdr = r
.records()
.into_iter()
.map(|x| x.expect("a csv record"))
.collect::<Vec<_>>();
// convert items to wtr
let rows: usize = rdr.len();
let mut wtr = Writer::from_writer(vec![]);
for row in 0..rows {
wtr.write_record(&rdr[row]).unwrap();
}
// convert wtr to string
let data = String::from_utf8(wtr.into_inner().unwrap()).unwrap();
// use tv_lib: print_from_csv_str
tv_lib::print::print_from_csv_str(data.as_str());
}