3 Vector

3.1 Print `Vec<f64>`

There are two ways to print vector
- Original way: print!("{:?}", a);
- Peroxide way: a.print(); - Round-off to fourth digit
```
fn main() {
    let a = vec![2f64.sqrt()];
    a.print(); // [1.4142]
}
```

3.2 Syntactic sugar for `Vec<f64>`

There is useful macro for Vec<f64>
For R, there is c
```
# R
a = c(1,2,3,4)
```

For Peroxide, there is c!

// Rust
fn main() {
    let a = c!(1,2,3,4);
}

3.3 From ranges to Vector

For R, there is seq to declare sequence.

# R
a = seq(1, 4, 1)
print(a)
# [1] 1 2 3 4

For peroxide, there is seq to declare sequence.

fn main() {
    let a = seq(1, 4, 1);
    a.print();
    // [1, 2, 3, 4]
}

3.4 Vector Operation

There are some vector-wise operations

add(&self, other: Vec<f64>) -> Vec<f64>
sub(&self, other: Vec<f64>) -> Vec<f64>
mul(&self, other: Vec<f64>) -> Vec<f64>
div(&self, other: Vec<f64>) -> Vec<f64>
dot(&self, other: Vec<f64>) -> f64
norm(&self) -> f64

fn main() {
    let a = c!(1,2,3,4);
    let b = c!(4,3,2,1);

    a.add(&b).print();
    a.sub(&b).print();
    a.mul(&b).print();
    a.div(&b).print();
    a.dot(&b).print();
    a.norm().print();

    // [5, 5, 5, 5]
    // [-3, -1, 1, 3]
    // [4, 6, 6, 4]
    // [0.25, 0.6667, 1.5, 4]
    // 20
    // 5.477225575051661 // sqrt(30)
}

And there are some useful operations too.

pow(&self, usize) -> Vec<f64>
powf(&self, f64) -> Vec<f64>
sqrt(&self) -> Vec<f64>

fn main() {
    let a = c!(1,2,3,4);

    a.pow(2).print();
    a.powf(0.5).print();
    a.sqrt().print();
    // [1, 4, 9, 16]
    // [1, 1.4142, 1.7321, 2]
    // [1, 1.4142, 1.7321, 2]
}

Peroxide Guide

3 Vector

3.1 Print `Vec<f64>`

3.2 Syntactic sugar for `Vec<f64>`

3.3 From ranges to Vector

3.4 Vector Operation

3.5 Concatenation

3.6 Conversion to Matrix

3 Vector

3.1 Print Vec<f64>

3.2 Syntactic sugar for Vec<f64>

3.3 From ranges to Vector

3.4 Vector Operation

3.5 Concatenation

3.6 Conversion to Matrix

3.1 Print `Vec<f64>`

3.2 Syntactic sugar for `Vec<f64>`