ndarray-rand

The random function from the ndarray_rand::RandomExt trait seems to go unrecognized when following the test example on the repo.

extern crate rand;
extern crate ndarray;
extern crate ndarray_rand;



#[cfg(test)]
mod tests {
    use rand::distributions::Range;
    use ndarray::Array;
    use ndarray_rand::RandomExt;

    #[test]
    fn it_works() {
        assert_eq!(2 + 2, 4);
        let (mm, nn) = (5, 5);
        for m in 0..mm {
            for n in 0..nn {
                let a = Array::random((m, n), Range::new(0., 2.));
                assert_eq!(a.shape(), &[m, n]);
                assert!(a.iter().all(|x| *x <= 2.));
                assert!(a.iter().all(|x| *x >= 0.));
            }
        }
    }
}

cargo test generates this compilation error

   Compiling randarr v0.1.0 (/tmp/randarr)                                                                                                            
error[E0599]: no function or associated item named `random` found for type `ndarray::ArrayBase<ndarray::OwnedRepr<_>, _>` in the current scope        
  --> src/lib.rs:19:25                                                                                                                                
   |                                                                                                                                                  
19 |                 let a = Array::random((m, n), Range::new(0., 2.));                                                                               
   |                         ^^^^^^^^^^^^^ function or associated item not found in `ndarray::ArrayBase<ndarray::OwnedRepr<_>, _>`                    
                                                                                                                                                      
error: aborting due to previous error                                                                                                                 
                                                                                                                                                      
For more information about this error, try `rustc --explain E0599`.                                                                                   
error: Could not compile `randarr`.

I'm not able to reproduce the issue. When I run cargo test in the ndarray-rand crate, all the tests pass. When I create a project with the following contents:

Cargo.toml

[package]
name = "foo"
version = "0.1.0"

[dependencies]
ndarray = "0.12"
ndarray-rand = "0.8"
rand = "0.5"

src/main.rs

extern crate rand;
extern crate ndarray;
extern crate ndarray_rand;

use rand::distributions::Range;
use ndarray::Array;
use ndarray_rand::RandomExt;

fn main() {
    assert_eq!(2 + 2, 4);
    let (mm, nn) = (5, 5);
    for m in 0..mm {
        for n in 0..nn {
            let a = Array::random((m, n), Range::new(0., 2.));
            assert_eq!(a.shape(), &[m, n]);
            assert!(a.iter().all(|x| *x <= 2.));
            assert!(a.iter().all(|x| *x >= 0.));
        }
    }
}

it builds and runs fine. I'm using Rust 1.30.0.

Does the example I provided above work on your machine? If so, will you please provide more details about the case that is failing for you?

Very strange! Setting up the project as you have I also don't get any errors. It appears its related to ndarray being version 11 in my cargo toml.

…

On Wed, Nov 7, 2018 at 6:45 AM, Jim Turner ***@***.***> wrote: I'm not able to reproduce the issue. When I run cargo test in the ndarray-rand crate, all the tests pass. When I create a project with the following contents: - Cargo.toml [package]name = "foo"version = "0.1.0" [dependencies]ndarray = "0.12"ndarray-rand = "0.8"rand = "0.5" - src/main.rs extern crate rand;extern crate ndarray;extern crate ndarray_rand; use rand::distributions::Range;use ndarray::Array;use ndarray_rand::RandomExt; fn main() { assert_eq!(2 + 2, 4); let (mm, nn) = (5, 5); for m in 0..mm { for n in 0..nn { let a = Array::random((m, n), Range::new(0., 2.)); assert_eq!(a.shape(), &[m, n]); assert!(a.iter().all(|x| *x <= 2.)); assert!(a.iter().all(|x| *x >= 0.)); } } } it builds and runs fine. I'm using Rust 1.30.0. Does the example I provided above work on your machine? If so, will you please provide more details about the case that is failing for you? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#530 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ALJWzw8w8X83G4L8V1g-QrchwoYnvrtuks5usuPcgaJpZM4YR0SH> .

Make sure the versions you're using are consistent. For example, ndarray-rand 0.8 requires ndarray 0.12 and rand 0.5, while ndarray-rand 0.7 requires ndarray 0.11 and rand 0.4. (See the README.)

I see! Sorry that seems like something which could have been avoided. Thanks for the help!

…

On Wed, Nov 7, 2018 at 10:56 AM, Jim Turner ***@***.***> wrote: Make sure the versions you're using are consistent. For example, ndarray-rand 0.8 requires ndarray 0.12 and rand 0.5, while ndarray-rand 0.7 requires ndarray 0.11 and rand 0.4. (See the README. <https://github.com/rust-ndarray/ndarray/tree/master/ndarray-rand>) — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#530 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ALJWz-OafX3clsKeLKoEhwf5SNy7O0yvks5usx7FgaJpZM4YR0SH> .

You're welcome. It's always nice when the problem is easy to solve. :)

By the way, this is related to rust-lang/rust#22750.

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ndarray-rand #530

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jturner314 commented on Nov 7, 2018

DevinBayly commented on Nov 7, 2018

jturner314 commented on Nov 7, 2018

DevinBayly commented on Nov 7, 2018

jturner314 commented on Nov 7, 2018

jturner314 commented on Nov 7, 2018

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