Add some references

2 years ago · 2bd926154b
--- a/4_logistic_regression/1-Least_squares.ipynb
+++ b/4_logistic_regression/1-Least_squares.ipynb
--- a/4_logistic_regression/2-Logistic_regression.ipynb
+++ b/4_logistic_regression/2-Logistic_regression.ipynb
--- a/4_logistic_regression/3-PCA_and_Logistic_Regression.ipynb
+++ b/4_logistic_regression/3-PCA_and_Logistic_Regression.ipynb
@@ -4,7 +4,7 @@
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# 链接主成分分析和逻辑回归"
    "# 主成分分析和逻辑回归"
   ]
  },
  {
@@ -544,7 +544,7 @@
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.6.9"
   "version": "3.7.9"
  }
 },
 "nbformat": 4,
--- a/4_logistic_regression/logistic_pred_res.pdf
+++ b/4_logistic_regression/logistic_pred_res.pdf
--- a/5_nn/1-Perceptron.ipynb
+++ b/5_nn/1-Perceptron.ipynb