Function russell_lab::generate3d

pub fn generate3d<F>(
    xmin: f64, 
    xmax: f64, 
    ymin: f64, 
    ymax: f64, 
    nx: usize, 
    ny: usize, 
    calc_z: F
) -> (Matrix, Matrix, Matrix) where
    F: Fn(f64, f64) -> f64, 

Generates 3d points

Input

• xmin, xmax – range along x
• ymin, ymax – range along y
• nx – is the number of points along x (must be >= 2)
• ny – is the number of points along y (must be >= 2)
• calc_z – is a function of (xij, yij) that calculates zij

Output

• x, y, z – (ny by nx) matrices

Example

use russell_lab::generate3d;
let (nx, ny) = (5, 3);
let (x, y, z) = generate3d(-1.0, 1.0, -2.0, 2.0, nx, ny, |x, y| x * x + y * y);
assert_eq!(
    format!("{}", x),
    "┌                          ┐\n\
     │   -1 -0.5    0  0.5    1 │\n\
     │   -1 -0.5    0  0.5    1 │\n\
     │   -1 -0.5    0  0.5    1 │\n\
     └                          ┘"
);
assert_eq!(
    format!("{}", y),
    "┌                ┐\n\
     │ -2 -2 -2 -2 -2 │\n\
     │  0  0  0  0  0 │\n\
     │  2  2  2  2  2 │\n\
     └                ┘"
);
assert_eq!(
    format!("{}", z),
    "┌                          ┐\n\
     │    5 4.25    4 4.25    5 │\n\
     │    1 0.25    0 0.25    1 │\n\
     │    5 4.25    4 4.25    5 │\n\
     └                          ┘"
);