added HW4

HW04/multiple_regression.stan

@@ -0,0 +1,28 @@
+data {
+  int<lower=0> N;             // Number of training samples
+  int<lower=0> M;             // Number of predictors (3: bmi, age, children)
+  matrix[N, M] X;             // Training predictors
+  vector[N] y;                // Training target (charges)
+  int<lower=0> N_test;        // Number of test samples
+  matrix[N_test, M] X_test;   // Test predictors
+}
+parameters {
+  real alpha;                 // Intercept
+  vector[M] beta;             // Regression coefficients
+  real<lower=0> sigma;        // Noise term
+}
+model {
+  // Priors
+  sigma ~ inv_gamma(2, 2);
+  alpha ~ normal(0, 10);
+  beta ~ normal(0, 1);
+
+  // Likelihood
+  y ~ normal(alpha + X * beta, sigma);
+}
+generated quantities {
+  vector[N_test] y_pred;      
+  for (i in 1:N_test) {
+    y_pred[i] = normal_rng(alpha + X_test[i] * beta, sigma);
+  }
+}

HW3/Q5/Q5.ipynb

@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -26,7 +26,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -46,7 +46,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -109,7 +109,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {

HW3/requirements.txt

@@ -1,15 +1,215 @@
-contourpy==1.3.1
-cycler==0.12.1
-fonttools==4.56.0
-kiwisolver==1.4.8
-matplotlib==3.10.1
-numpy==2.2.3
+alabaster==1.0.0
+annotated-types==0.7.0
+anyascii==0.3.2
+anyio==4.8.0
+apparmor==4.0.3
+application-utility==1.4.0
+arandr==0.1.11
+argcomplete==3.5.3
+arrow==1.3.0
+attrs==23.2.1.dev0
+autocommand==2.2.2
+Automat==22.10.0
+b2==4.3.0
+b2sdk==2.7.0
+Babel==2.15.0
+black==25.1.0
+breezy==3.3.9
+btrfsutil==6.13
+build==1.2.2
+CacheControl==0.14.2
+cachy==0.3.0
+certifi==2025.1.31
+cffi==1.17.1
+cfgv==3.4.0
+chardet==5.2.0
+charset-normalizer==3.4.1
+cleo==2.1.0
+click==8.1.8
+configobj==5.0.9
+constantly==23.10.4
+crashtest==0.4.1
+cryptography==44.0.2
+cssselect2==0.7.0
+Cython==0.29.37
+dbus-python==1.4.0
+deluge==2.1.1
+distlib==0.3.9
+distro==1.9.0
+docopt==0.6.2
+docutils==0.21.2
+dulwich==0.22.8
+ecdsa==0.19.0
+editables==0.5
+fastbencode==0.3.1
+fastjsonschema==2.21.1
+filelock==3.18.0
+findpython==0.6.3
+flit_core==3.11.0
+GeoIP==1.3.2
+gpg==1.24.2
+gufw==24.4.0
+h11==0.14.0
+hatch==1.14.0
+hatchling==1.27.0
+html5lib==1.1
+httpcore==1.0.7
+httplib2==0.22.0
+httpx==0.28.1
+hyperlink==21.0.0
+identify==2.6.9
+idna==3.10
+ifaddr==0.2.0
+imagesize==1.4.1
+importlib_metadata==7.2.1
+incremental==22.10.0
+inflect==7.5.0
+iniconfig==2.0.0
+installer==0.7.0
+jaraco.classes==3.4.0
+jaraco.collections==5.1.0
+jaraco.context==6.0.1
+jaraco.functools==4.1.0
+jaraco.text==4.0.0
+jeepney==0.9.0
+Jinja2==3.1.5
+jsonschema==4.23.0
+jsonschema-specifications==2024.10.1
+keyring==25.6.0
+lark==1.2.2
+launchpadlib==2.0.0
+lazr.restfulclient==0.14.6
+lazr.uri==1.0.6
+legacy-cgi==2.6.2
+lensfun==0.3.4
+LibAppArmor==4.0.3
+libtorrent==2.0.11
+lit==19.1.7.dev0
+lockfile==0.12.2
+logfury==1.0.1
+lxml==5.3.1
+Mako==1.3.9.dev0
+Markdown==3.7
+markdown-it-py==3.0.0
+MarkupSafe==2.1.5
+material-color-utilities-python==0.1.5
+mdurl==0.1.2
+merge3==0.0.15
+meson==1.7.0
+more-itertools==10.6.0
+msgpack==1.0.5
+mypy_extensions==1.0.0
+netifaces==0.11.0
+nftables==0.1
+nodeenv==1.9.1
+npyscreen==4.10.5
+oauthlib==3.2.2
+ordered-set==4.1.0
 packaging==24.2
-pandas==2.2.3
-paranoid-scientist==0.2.3
+pacman_mirrors==4.27
+pathspec==0.12.1
+patiencediff==0.2.15
+pbs-installer==2025.3.17
+pefile==2024.8.26
+pexpect==4.9.0
+phx-class-registry==4.0.6
 pillow==11.1.0
+pkginfo==1.12.0
+platformdirs==4.3.6
+pluggy==1.5.0
+poetry==2.1.1
+poetry-core==2.1.1
+poetry-plugin-export==1.9.0
+pre_commit==4.1.0
+psutil==7.0.0
+ptyprocess==0.7.0
+pyasn1==0.6.0
+pyasn1_modules==0.4.0
+pycairo==1.27.0
+pycparser==2.22
+pydantic==2.10.6
+pydantic_core==2.27.2
+pygame_sdl2==2.1.0
+Pygments==2.19.1
+PyGObject==3.52.3
+pynotify==1.3.0
+pyOpenSSL==25.0.0
 pyparsing==3.2.1
-python-dateutil==2.9.0.post0
+pyproject_hooks==1.2.0
+PyQt5==5.15.11
+PyQt5_sip==12.17.0
+PyQt6==6.8.1
+PyQt6_sip==13.10.0
+PySocks==1.7.1
+pytest==8.3.5
+python-dateutil==2.9.0
 pytz==2025.1
+pyxdg==0.28
+PyYAML==6.0.2
+ranger-fm==1.9.4
+RapidFuzz==3.12.2
+referencing==0.35.1
+regex==2024.11.6
+rencode==1.0.6
+reportlab==4.2.2
+requests==2.32.3
+requests-toolbelt==1.0.0
+rich==13.9.4
+roman-numerals-py==3.1.0
+rpds-py==0.22.3
+rsa==4.9
+rst2ansi==0.1.5
+SecretStorage==3.3.3
+service-identity==24.2.0
+setproctitle==1.3.5
+setuptools==75.8.0
+setuptools-scm==8.2.1
+shellingham==1.5.4
+simplejson==3.20.1
 six==1.17.0
-tzdata==2025.1
+sniffio==1.3.1
+snowballstemmer==2.2.0
+speedtest-cli==2.1.3
+Sphinx==8.2.3
+sphinx_rtd_dark_mode==1.3.0
+sphinx_rtd_theme==2.0.0
+sphinxcontrib-applehelp==2.0.0
+sphinxcontrib-devhelp==2.0.0
+sphinxcontrib-htmlhelp==2.1.0
+sphinxcontrib-jquery==4.1
+sphinxcontrib-jsmath==1.0.1
+sphinxcontrib-qthelp==2.0.0
+sphinxcontrib-serializinghtml==2.0.0
+svglib==1.5.1
+systemd-python==235
+tabulate==0.9.0
+termcolor==2.5.0
+tinycss2==1.4.0
+tomli==2.0.1
+tomli_w==1.2.0
+tomlkit==0.13.2
+torbrowser-launcher==0.3.7
+tqdm==4.67.1
+trove-classifiers==2025.3.19.19
+Twisted==24.3.0
+typeguard==4.4.2
+types-python-dateutil==2.9.0.20241206
+typing_extensions==4.12.2
+tzlocal==5.3.1
+ueberzug==18.3.1
+ufw==0.36.2
+urllib3==2.3.0
+userpath==1.9.2
+uv==0.6.10
+validate==5.0.9
+validate-pyproject==0.24.1
+virtualenv==20.28.0
+wadllib==2.0.0
+webencodings==0.5.1
+wheel==0.45.1
+woeusb-ng==0.2.12
+wxPython==4.2.2
+Yapsy==2.0.0
+zipp==3.21.0
+zope.interface==7.2
+zstandard==0.23.0