Day 110 – Data Science Journey
-> K-Means Clustering :variable dataset
-> Raw data points with scatter plots
-> KMeans (n_clusters=3) and assigned cluster labels
-> Plotted clusters with centroids for clear separation
#100DaysOfCode#DataScience#MachineLearning#Clustering
Day 107 – Data Science Journey
-> Built a basic ML Pipeline
-> One-Hot Encoding + MinMax Scaling
-> RFECV (RandomForest) - Optimal Features
-> Model Eval & Pipeline
-> Precision–Recall Threshold Tuning
#100DaysOfCode#DataScience#MachineLearning
Day 106 – Data Science Journey
-> Grid Search – Hyperparameter Tuning
-> Parameter combos (exhaustive search)
-> Eg: n_estimators, max_depth in RF
-> Finds best model settings automatically
-> Costly for big grids, gives optimal result
#100DaysOfCode#DataScience#MachineLearning
Day 104 – Data Science Journey
->KNN – Choosing the Right k
-> Small k (1–2): noisy, unstable
-> Large k: smooth, biased
->Odd k: avoids ties (binary case)
-> Plot k vs accuracy = find the sweet spot
#100DaysOfCode#DataScience#MachineLearning
Day 103 – Data Science Journey
-> KNN Classification with Euclidean distance
-> Feature Scaling: Standardization & Normalization
-> Derived scaling equations
-> Compared performance on unscaled vs standardized vs normalized data
#100DaysOfCode#DataScience#MachineLearning
Day 102 – Data Science Journey
->Learned KNN Classifier on balanced dataset
->Performed train-test split, model fitting & predictions
->Evaluated model using accuracy score
->Analyzed impact of feature selection on performance
#100DaysOfCode#DataScience#MachineLearning
Day 99 – Data Science Journey
-> Data cleaning (dropna, IQR outliers)
-> RFECV for feature selection
-> Decision Tree with max_depth tuning
-> Metrics: Accuracy, Precision, Recall, F1
-> Visualized tree & threshold trade-offs
#100DaysOfCode#DataScience#MachineLearning
Day 98 – Data Science Journey
-> Formula: Gini=1−∑(pi)^2 where pi= class probability
-> Value range: 0 (pure node) → max (high impurity)
-> Used in Decision Trees (CART) to find the best split
-> Goal: minimize Gini after splitting
#100DaysOfCode#DataScience#MachineLearning
Day 97 – Data Science Journey
->DecisionTreeClassifier: classification tasks
->Train-test split, model training, acc_evaluation
-> Overfitting : detected by comparing train vs test accuracy
-> Visualizing decision trees with plot_tree
#100DaysOfCode#DataScience#MachineLearning
🚀 Day 92 – Data Science Journey
🔹 Logistic Regression fundamentals: Probability, Odds, and Sigmoid function
🔹 Basic of Logistic Regression
🔹 Interpretation of predictions using accuracy & graphs
#100DaysOfCode#DataScience#MachineLearning
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568 Followers 587 Followinghey there, I'm a competitive programmer with a keen interest in problem solving & web dev!
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