Store and update stats related to our data array without iterating again and again.
Read Documentation
Note: We calculate approx median((min + max + 2*mean)/4) as to not iterate again and again but you can set the exact one by using
calculate_median().
```rust use simple_accumulator::SimpleAccumulator;
fn main() { let k = [1, 2, 3, 4];
// Set field `accumulate` to `false` to not update the field values when
// changed, you will need to call `calculate_all` to get updated values.
let mut x = SimpleAccumulator::new(&k, true);
println!("{:#?}", x);
x.push(5);
println!("{:#?}", x);
x.pop();
println!("{:#?}", x);
x.remove(2);
println!("{:#?}", x);
} ```
shell
SimpleAccumulator {
vec: [
1.0,
2.0,
3.0,
4.0,
],
mean: 2.5,
population_variance: 1.25,
standard_deviation: 1.118033988749895,
min: 1.0,
max: 4.0,
median: 2.5,
len: 4,
capacity: 4,
fixed_capacity: false,
last_write_position: 0,
accumulate: true,
}
SimpleAccumulator {
vec: [
1.0,
2.0,
3.0,
4.0,
5.0,
],
mean: 3.0,
population_variance: 2.0,
standard_deviation: 1.4142135623730951,
min: 1.0,
max: 5.0,
median: 3.0,
len: 5,
capacity: 8,
fixed_capacity: false,
last_write_position: 0,
accumulate: true,
}
SimpleAccumulator {
vec: [
1.0,
2.0,
3.0,
4.0,
],
mean: 2.5,
population_variance: 1.25,
standard_deviation: 1.118033988749895,
min: 1.0,
max: 4.0,
median: 2.5,
len: 4,
capacity: 8,
fixed_capacity: false,
last_write_position: 0,
accumulate: true,
}
SimpleAccumulator {
vec: [
1.0,
2.0,
4.0,
],
mean: 2.3333333333333335,
population_variance: 1.5555555555555554,
standard_deviation: 1.247219128924647,
min: 1.0,
max: 4.0,
median: 2.416666666666667,
len: 3,
capacity: 8,
fixed_capacity: false,
last_write_position: 0,
accumulate: true,
}
```rust
const CAPACITY: usize = 3;
let mut acc = SimpleAccumulator::withfixedcapacity::
let data = vec![0.0, 1.1, 2.2, 3.3, 4.4]; for &v in &data { acc.push(v); } println!("{acc:?}"); asserteq!(acc.vec.len(), CAPACITY); asserteq!(acc.vec, vec![3.3, 4.4, 2.2]);
acc.push(5.5); asserteq!(acc.vec.len(), CAPACITY); asserteq!(acc.vec, vec![3.3, 4.4, 5.5]);
acc.push(6.6); asserteq!(acc.vec.len(), CAPACITY); asserteq!(acc.vec, vec![6.6, 4.4, 5.5]); ```