Store and update stats related to our data array without iterating again and again.
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().
Usage:
```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);
} ```
Output:
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,
current_write_position: 0,
accumulate: true,
}
SimpleAccumulator {
vec: [
1.0,
2.0,
3.0,
4.0,
5.0,
],
mean: 3.0,
population_variance: 1.8,
standard_deviation: 1.3416407864998738,
min: 1.0,
max: 5.0,
median: 3.0,
len: 5,
capacity: 8,
fixed_capacity: false,
current_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,
current_write_position: 0,
accumulate: true,
}
SimpleAccumulator {
vec: [
1.0,
2.0,
4.0,
],
mean: 2.3333333333333335,
population_variance: 1.5833333333333333,
standard_deviation: 1.2583057392117916,
min: 1.0,
max: 4.0,
median: 2.416666666666667,
len: 3,
capacity: 8,
fixed_capacity: false,
current_write_position: 0,
accumulate: true,
}