import streamlit as st import numpy as np import matplotlib.pyplot as plt number_of_observations = st.slider('Number of observations', min_value=50, max_value=150, value=50) noise_standard_deviation = st.slider('Standard deviation of the noise', min_value = 0.0, max_value=0.5, value=0.25) np.random.seed(2) X = np.column_stack((np.ones(number_of_observations), np.random.random(number_of_observations))) w = np.array([3.0, -20.0, 32.0]) # coefficients X = np.column_stack((X, X[:,1] ** 2)) # add x**2 column additional_noise = 8 * np.random.binomial(1, 0.03, size = number_of_observations) y = np.dot(X, w) + noise_standard_deviation * np.random.randn(number_of_observations) \ + additional_noise fig, ax = plt.subplots(dpi=320) ax.set_xlim((0,1)) ax.set_ylim((-5,20)) ax.scatter(X[:,1], y, c='r', edgecolors='black') st.pyplot(fig) st.write(X[:5, :])