From ef711b5e955bbf9ff36d28bc37b66fc7b395cb82 Mon Sep 17 00:00:00 2001
From: Andrew Golovashevich <landgrafhomyak@gmail.com>
Date: Sun, 8 Feb 2026 21:40:19 +0300
Subject: [PATCH] [lab4] Model implementation

---
 lab4/src/algo/compute.rs |  8 ++---
 lab4/src/algo/fix.rs     | 22 ++++++------
 lab4/src/algo/mod.rs     |  1 +
 lab4/src/algo/net.rs     | 75 ++++++++++++++++++++++++++++++++++++++++
 4 files changed, 91 insertions(+), 15 deletions(-)
 create mode 100644 lab4/src/algo/net.rs

diff --git a/lab4/src/algo/compute.rs b/lab4/src/algo/compute.rs
index 9c9fc77..1f92439 100644
--- a/lab4/src/algo/compute.rs
+++ b/lab4/src/algo/compute.rs
@@ -1,8 +1,8 @@
 use std::ops::Index;
 
-fn compute_potential<WA: Index<usize, Output = f64>>(
-    weights: &[WA],
+pub(super) fn compute<WA: Index<usize, Output = f64>>(
     input_data: &[f64],
+    weights: &[WA],
     potential_data: &mut [f64],
     output_data: &mut [f64],
     f: impl Fn(f64) -> f64,
@@ -28,7 +28,7 @@ fn test_compiles_static() {
     let mut potential_data = [0.0, 0.0];
     let mut output_data = [0.0, 0.0];
 
-    compute_potential(&weights, &input_data, &mut potential_data, &mut output_data, |x| x);
+    compute(&input_data,&weights,  &mut potential_data, &mut output_data, |x| x);
 }
 
 #[test]
@@ -38,5 +38,5 @@ fn test_compiles_dynamic() {
     let mut potential_data = [0.0, 0.0];
     let mut output_data = [0.0, 0.0];
 
-    compute_potential(&weights, &input_data, &mut potential_data, &mut output_data, |x| x);
+    compute(&input_data, &weights, &mut potential_data, &mut output_data, |x| x);
 }
\ No newline at end of file
diff --git a/lab4/src/algo/fix.rs b/lab4/src/algo/fix.rs
index 0c28921..948f09b 100644
--- a/lab4/src/algo/fix.rs
+++ b/lab4/src/algo/fix.rs
@@ -1,12 +1,12 @@
 use std::ops::{Index, IndexMut};
 
-fn calc_error<NWA: Index<usize, Output = f64>>(
+pub(super) fn calc_error<NWA: Index<usize, Output = f64>>(
     next_errors: &[f64],
-    weights: &[NWA],
+    next_weights: &[NWA],
     current_errors: &mut [f64],
 ) {
     for i in 0..current_errors.len() {
-        current_errors[i] = weights
+        current_errors[i] = next_weights
             .iter()
             .enumerate()
             .map(|(j, ww)| ww[i] * next_errors[j])
@@ -14,19 +14,19 @@ fn calc_error<NWA: Index<usize, Output = f64>>(
     }
 }
 
-fn apply_error<NWA: IndexMut<usize, Output = f64>>(
+pub(super) fn apply_error<NWA: IndexMut<usize, Output = f64>>(
     n: f64,
-    errors: &[f64],
-    weights: &mut [NWA],
-    current_potentials: &[f64],
+    next_errors: &[f64],
+    next_weights: &mut [NWA],
+    current_outputs: &[f64],
     next_potentials: &[f64],
-    f: impl Fn(f64) -> f64,
     f1: impl Fn(f64) -> f64,
 ) {
-    for i in 0..current_potentials.len() {
+    for i in 0..current_outputs.len() {
         for j in 0..next_potentials.len() {
-            let dw = n * errors[j] * f1(next_potentials[j]) * f(current_potentials[i]);
-            weights[j][i] += dw;
+            let dw = n * next_errors[j] * f1(next_potentials[j]) * current_outputs[i];
+            next_weights[j][i] += dw;
         }
     }
 }
+
diff --git a/lab4/src/algo/mod.rs b/lab4/src/algo/mod.rs
index 0a290fc..a89eddd 100644
--- a/lab4/src/algo/mod.rs
+++ b/lab4/src/algo/mod.rs
@@ -1,2 +1,3 @@
 mod compute;
 mod fix;
+mod net;
diff --git a/lab4/src/algo/net.rs b/lab4/src/algo/net.rs
new file mode 100644
index 0000000..9b1ec8e
--- /dev/null
+++ b/lab4/src/algo/net.rs
@@ -0,0 +1,75 @@
+use crate::algo::compute::compute;
+use crate::algo::fix::{apply_error, calc_error};
+use std::ops::{Div, Mul};
+
+struct Net<const InputLayerSize: usize, const OutputLayerSize: usize> {
+    inner_layer_size: usize,
+    pub input_data: [f64; InputLayerSize],
+    i_to_h_weights: Vec<[f64; InputLayerSize]>,
+    hidden_potentials: Vec<f64>,
+    hidden_data: Vec<f64>,
+    h_to_o_weights: [Vec<f64>; OutputLayerSize],
+    output_potentials: [f64; OutputLayerSize],
+    pub output_data: [f64; OutputLayerSize],
+    output_errors: [f64; OutputLayerSize],
+    hidden_errors: Vec<f64>,
+}
+
+impl<const InputLayerSize: usize, const OutputLayerSize: usize>
+    Net<InputLayerSize, OutputLayerSize>
+{
+    fn _sigmoid(x: f64) -> f64 {
+        return 1.0.div(1.0 + (-x).exp());
+    }
+
+    fn _sigmoidDerivative(x: f64) -> f64 {
+        return x.mul(1.0 - x);
+    }
+
+    pub fn compute(&mut self) {
+        compute(
+            &self.input_data,
+            self.i_to_h_weights.as_slice(),
+            self.hidden_potentials.as_mut_slice(),
+            self.hidden_data.as_mut_slice(),
+            Self::_sigmoid,
+        );
+
+        compute(
+            self.hidden_data.as_slice(),
+            &self.h_to_o_weights,
+            &mut self.output_potentials,
+            &mut self.output_data,
+            Self::_sigmoid,
+        )
+    }
+
+    pub fn fix(&mut self, expected: &[f64; OutputLayerSize], n: f64) {
+        for (i, (a, e)) in self.output_data.iter().zip(expected).enumerate() {
+            self.output_errors[i] = e - a;
+        }
+
+        calc_error(
+            &self.output_errors,
+            &self.h_to_o_weights,
+            self.hidden_errors.as_mut_slice(),
+        );
+
+        apply_error(
+            n,
+            &self.output_errors,
+            &mut self.h_to_o_weights,
+            self.hidden_data.as_slice(),
+            &self.output_potentials,
+            Self::_sigmoidDerivative
+        );
+        apply_error(
+            n,
+            self.hidden_errors.as_slice(),
+            self.i_to_h_weights.as_mut_slice(),
+            &self.input_data,
+            self.hidden_potentials.as_slice(),
+            Self::_sigmoidDerivative
+        );
+    }
+}