Function autograd::ops::placeholder

pub fn placeholder<T: Float>(shape_: &[isize]) -> Tensor<T>

Creates a placeholder tensor.

extern crate ndarray;
extern crate autograd as ag;

let x = ag::placeholder(&[2]);

// Fills placeholder, then eval
let arr = ndarray::arr1(&[1., 1.]).into_dyn();
assert_eq!(x.eval(&[(&x, &arr.clone())]), Some(arr));