Dataset Name: Hand Gesture Recognition Database
Basic Denoscription: Acquired by Leap Motion

📖 FULL DATASET DESCRIPTION:
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Hand gesture recognition database is presented, composed by a set of near infrared images acquired by the Leap Motion sensor.
The database is composed by 10 different hand-gestures (showed above) that were performed by 10 different subjects (5 men and 5 women).
The database is structured in different folders as:

📥 DATASET DOWNLOAD INFORMATION
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🔴 Dataset Size: Download dataset as zip (2 GB)

🔰 Direct dataset download link:
https://www.kaggle.com/api/v1/datasets/download/gti-upm/leapgestrecog

📊 Additional information:
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Total files: 20,000
Views: 255,000
Downloads: 35,200

📚 RELATED NOTEBOOKS:
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1. Hand Gesture Recognition Database with CNN | Upvotes: 1,022
   URL: https://www.kaggle.com/code/benenharrington/hand-gesture-recognition-database-with-cnn

2. [keras] Hand Gesture Recognition CNN | Upvotes: 492
   URL: https://www.kaggle.com/code/kageyama/keras-hand-gesture-recognition-cnn

3. 100% in Hand Gesture Recognition | Upvotes: 245
   URL: https://www.kaggle.com/code/mohamedgobara/100-in-hand-gesture-recognition

4. Multi-Modal Dataset for Hand Gesture Recognition | Upvotes: 49
   URL: https://www.kaggle.com/datasets/gti-upm/multimodhandgestrec

5. Hand Gesture Recognition Dataset | Upvotes: 8
   URL: https://www.kaggle.com/datasets/tapakah68/hand-gesture-recognition-dataset

==============================

📊 Data Science Summarized: The Core Pillars of Success! 🚀

✅ 1️⃣ Statistics:
The backbone of data analysis and decision-making.
Used for hypothesis testing, distributions, and drawing actionable insights.

✅ 2️⃣ Mathematics:
Critical for building models and understanding algorithms.
Focus on:
Linear Algebra
Calculus
Probability & Statistics

✅ 3️⃣ Python:
The most widely used language in data science.
Essential libraries include:
Pandas
NumPy
Scikit-Learn
TensorFlow

✅ 4️⃣ Machine Learning:
Use algorithms to uncover patterns and make predictions.
Key types:
Regression
Classification
Clustering

✅ 5️⃣ Domain Knowledge:
Context matters.
Understand your industry to build relevant, useful, and accurate models.

Tools Every AI Engineer Should Know

1. Data Science Tools
Python: Preferred language with libraries like NumPy, Pandas, Scikit-learn.
R: Ideal for statistical analysis and data visualization.
Jupyter Notebook: Interactive coding environment for Python and R.
MATLAB: Used for mathematical modeling and algorithm development.
RapidMiner: Drag-and-drop platform for machine learning workflows.
KNIME: Open-source analytics platform for data integration and analysis.

2. Machine Learning Tools
Scikit-learn: Comprehensive library for traditional ML algorithms.
XGBoost & LightGBM: Specialized tools for gradient boosting.
TensorFlow: Open-source framework for ML and DL.
PyTorch: Popular DL framework with a dynamic computation graph.
H2O.ai: Scalable platform for ML and AutoML.
Auto-sklearn: AutoML for automating the ML pipeline.

3. Deep Learning Tools
Keras: User-friendly high-level API for building neural networks.
PyTorch: Excellent for research and production in DL.
TensorFlow: Versatile for both research and deployment.
ONNX: Open format for model interoperability.
OpenCV: For image processing and computer vision.
Hugging Face: Focused on natural language processing.

4. Data Engineering Tools
Apache Hadoop: Framework for distributed storage and processing.
Apache Spark: Fast cluster-computing framework.
Kafka: Distributed streaming platform.
Airflow: Workflow automation tool.
Fivetran: ETL tool for data integration.
dbt: Data transformation tool using SQL.

5. Data Visualization Tools
Tableau: Drag-and-drop BI tool for interactive dashboards.
Power BI: Microsoft’s BI platform for data analysis and visualization.
Matplotlib & Seaborn: Python libraries for static and interactive plots.
Plotly: Interactive plotting library with Dash for web apps.
D3.js: JavaScript library for creating dynamic web visualizations.

6. Cloud Platforms
AWS: Services like SageMaker for ML model building.
Google Cloud Platform (GCP): Tools like BigQuery and AutoML.
Microsoft Azure: Azure ML Studio for ML workflows.
IBM Watson: AI platform for custom model development.

7. Version Control and Collaboration Tools
Git: Version control system.
GitHub/GitLab: Platforms for code sharing and collaboration.
Bitbucket: Version control for teams.

8. Other Essential Tools
Docker: For containerizing applications.
Kubernetes: Orchestration of containerized applications.
MLflow: Experiment tracking and deployment.
Weights & Biases (W&B): Experiment tracking and collaboration.
Pandas Profiling: Automated data profiling.
BigQuery/Athena: Serverless data warehousing tools.
Mastering these tools will ensure you are well-equipped to handle various challenges across the AI lifecycle.

#artificialintelligence

Essential Python Libraries for Data Science

- Numpy: Fundamental for numerical operations, handling arrays, and mathematical functions.

- SciPy: Complements Numpy with additional functionalities for scientific computing, including optimization and signal processing.

- Pandas: Essential for data manipulation and analysis, offering powerful data structures like DataFrames.

- Matplotlib: A versatile plotting library for creating static, interactive, and animated visualizations.

- Keras: A high-level neural networks API, facilitating rapid prototyping and experimentation in deep learning.

- TensorFlow: An open-source machine learning framework widely used for building and training deep learning models.

- Scikit-learn: Provides simple and efficient tools for data mining, machine learning, and statistical modeling.

- Seaborn: Built on Matplotlib, Seaborn enhances data visualization with a high-level interface for drawing attractive and informative statistical graphics.

- Statsmodels: Focuses on estimating and testing statistical models, providing tools for exploring data, estimating models, and statistical testing.

- NLTK (Natural Language Toolkit): A library for working with human language data, supporting tasks like classification, tokenization, stemming, tagging, parsing, and more.

These libraries collectively empower data scientists to handle various tasks, from data preprocessing to advanced machine learning implementations.

ENJOY LEARNING 👍👍

Dataset Name: Disease Risk from Daily Habits

This dataset contains detailed lifestyle and biometric information from 100,000 individuals. The goal is to predict the likelihood of having a disease based on habits, health metrics, demographics, and psychological indicators.

🔰 Direct dataset download link:
https://www.kaggle.com/api/v1/datasets/download/mahdimashayekhi/disease-risk-from-daily-habits

📚 RELATED NOTEBOOKS:

1. Heart Attack Risk Prediction Dataset | Upvotes: 273
URL: https://www.kaggle.com/datasets/iamsouravbanerjee/heart-attack-prediction-dataset

2. Diabetes_prediction_dataset | Upvotes: 88
URL: https://www.kaggle.com/datasets/marshalpatel3558/diabetes-prediction-dataset

3. Health & Lifestyle Dataset | Upvotes: 37
URL: https://www.kaggle.com/datasets/mahdimashayekhi/health-and-lifestyle-dataset

4. 🧬 Predicting Disease Risk from Daily Habits | Upvotes: 11
URL: https://www.kaggle.com/code/mahdimashayekhi/predicting-disease-risk-from-daily-habits

Data Analyst Interview Questions with Answers

1. What is the difference between the RANK() and DENSE_RANK() functions?

The RANK() function in the result set defines the rank of each row within your ordered partition. If both rows have the same rank, the next number in the ranking will be the previous rank plus a number of duplicates. If we have three records at rank 4, for example, the next level indicated is 7. The DENSE_RANK() function assigns a distinct rank to each row within a partition based on the provided column value, with no gaps. If we have three records at rank 4, for example, the next level indicated is 5.

2. Explain One-hot encoding and Label Encoding. How do they affect the dimensionality of the given dataset?

One-hot encoding is the representation of categorical variables as binary vectors. Label Encoding is converting labels/words into numeric form. Using one-hot encoding increases the dimensionality of the data set. Label encoding doesn’t affect the dimensionality of the data set. One-hot encoding creates a new variable for each level in the variable whereas, in Label encoding, the levels of a variable get encoded as 1 and 0.

3. What is the shortcut to add a filter to a table in EXCEL?

The filter mechanism is used when you want to display only specific data from the entire dataset. By doing so, there is no change being made to the data. The shortcut to add a filter to a table is Ctrl+Shift+L.

4. What is DAX in Power BI?

DAX stands for Data Analysis Expressions. It's a collection of functions, operators, and constants used in formulas to calculate and return values. In other words, it helps you create new info from data you already have.

5. Define shelves and sets in Tableau?

Shelves: Every worksheet in Tableau will have shelves such as columns, rows, marks, filters, pages, and more. By placing filters on shelves we can build our own visualization structure. We can control the marks by including or excluding data.
Sets: The sets are used to compute a condition on which the dataset will be prepared. Data will be grouped together based on a condition. Fields which is responsible for grouping are known assets. For example – students having grades of more than 70%.

React ❤️ for more

The Only roadmap you need to become an ML Engineer 🥳

Phase 1: Foundations (1-2 Months)
🔹 Math & Stats Basics – Linear Algebra, Probability, Statistics
🔹 Python Programming – NumPy, Pandas, Matplotlib, Scikit-Learn
🔹 Data Handling – Cleaning, Feature Engineering, Exploratory Data Analysis

Phase 2: Core Machine Learning (2-3 Months)
🔹 Supervised & Unsupervised Learning – Regression, Classification, Clustering
🔹 Model Evaluation – Cross-validation, Metrics (Accuracy, Precision, Recall, AUC-ROC)
🔹 Hyperparameter Tuning – Grid Search, Random Search, Bayesian Optimization
🔹 Basic ML Projects – Predict house prices, customer segmentation

Phase 3: Deep Learning & Advanced ML (2-3 Months)
🔹 Neural Networks – TensorFlow & PyTorch Basics
🔹 CNNs & Image Processing – Object Detection, Image Classification
🔹 NLP & Transformers – Sentiment Analysis, BERT, LLMs (GPT, Gemini)
🔹 Reinforcement Learning Basics – Q-learning, Policy Gradient

Phase 4: ML System Design & MLOps (2-3 Months)
🔹 ML in Production – Model Deployment (Flask, FastAPI, Docker)
🔹 MLOps – CI/CD, Model Monitoring, Model Versioning (MLflow, Kubeflow)
🔹 Cloud & Big Data – AWS/GCP/Azure, Spark, Kafka
🔹 End-to-End ML Projects – Fraud detection, Recommendation systems

Phase 5: Specialization & Job Readiness (Ongoing)
🔹 Specialize – Computer Vision, NLP, Generative AI, Edge AI
🔹 Interview Prep – Leetcode for ML, System Design, ML Case Studies
🔹 Portfolio Building – GitHub, Kaggle Competitions, Writing Blogs
🔹 Networking – Contribute to open-source, Attend ML meetups, LinkedIn presence

Follow this advanced roadmap to build a successful career in ML!

The data field is vast, offering endless opportunities so start preparing now.

What are the main assumptions of linear regression?

There are several assumptions of linear regression. If any of them is violated, model predictions and interpretation may be worthless or misleading.

1) Linear relationship between features and target variable.

2) Additivity means that the effect of changes in one of the features on the target variable does not depend on values of other features. For example, a model for predicting revenue of a company have of two features - the number of items a sold and the number of items b sold. When company sells more items a the revenue increases and this is independent of the number of items b sold. But, if customers who buy a stop buying b, the additivity assumption is violated.

3) Features are not correlated (no collinearity) since it can be difficult to separate out the individual effects of collinear features on the target variable.

4) Errors are independently and identically normally distributed (yi = B0 + B1*x1i + ... + errori):

i) No correlation between errors (consecutive errors in the case of time series data).

ii) Constant variance of errors - homoscedasticity. For example, in case of time series, seasonal patterns can increase errors in seasons with higher activity.

iii) Errors are normaly distributed, otherwise some features will have more influence on the target variable than to others. If the error distribution is significantly non-normal, confidence intervals may be too wide or too narrow.

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