csci5451/assignments/01/main.py

# import numexpr as ne
import numpy as np

with open("dataset/small_data.csv", "r") as f:
    desc = f.readline().strip()
    rows, dimensions = map(int, desc.split(" "))
    data = np.loadtxt(f)
print("loaded data")

with open("dataset/small_label.csv", "r") as f:
    desc = f.readline().strip()
    rows = int(desc)
    labels = np.loadtxt(f)
print("loaded labels")

print(data.shape)
print(labels.shape)

w = np.zeros(dimensions)
print(w)

np.set_printoptions(precision=3)
for _ in range(10):
    new_w = np.empty(w.shape)
    for i in range(dimensions):
        data_ni = np.delete(data, i, axis=1)
        w_ni = np.delete(w, i)

        res = data_ni @ w_ni

        x_i = data[:,i]
        numer = x_i.transpose() @ (labels - res)
        denom = x_i.transpose() @ x_i

        new_w[i] = numer / denom

    print("new_w", np.round(new_w, 3))
    w = new_w