Data Science Stack Exchange
Data Science Stack Exchange

Questions tagged [coursera]

10 questions
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Extract features from Decision tree leaf nodes

Recently came across a coursera course on "How to win Kaggle competitions" where they explain how we can engineer a categorical feature from each leaf node of the decision tree. [Video Link][1] I cannot understand this concept. Any suggestion or…
data_person
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Advice on where to continue in the field of data engineering and machine learning

I finished a 28 hours Machine learning with python (Basic course) on Udemy, and it was very beneficial. My aim, is to be able to understand what is ML and how to use its concepts while working with data. I am confused about where to continue. My…
alim1990
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Understanding 'scale_boxes' in YOLO Algorithm of CNN

I'm studying Andrew NG's Convolutional Neural Networks and am in Week 3 of the course which deals with object detection using YOLO algorithm . I don't understand one section in the programming assignment that uses a function called 'scale_boxes' .…
Bharathi
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What should I start with first? Python for beginners or applied data science?

I am new to data science and I would like to go deep into it. I decided to start working with advanced competitions on kaggle, yet I should refine my knowledge in python and ML. I am an engineer, with 4 years of programming (basically php vanilla…
alim1990
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Does YOLO give preference to color over shape or vice-versa while detecting an object?

If you train your YOLO model only on grayscale images to detect car, then would it able to recognise a car in a colored image also. If so, then can I assume that YOLO consider only object shape not color? Kindly clarify.
Abhishek Singla
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MATLAB @ symbol for fminunc / fmincg function

I am following Andrew Ng's Coursera class on machine learning, and I came across this syntax for the fminunc and fmincg functions: fmincg (@(t)(lrCostFunction(t, X, (y == c), lambda)),initial_theta, options); Specifically, it is the @ that's…
An Ignorant Wanderer
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Difference between a log scale and linear scale : np.random.rand()

How and why will a linear np.random.rand() (to generate a linear scale between 0.0001 and 1) not result in better distributed result but np.power(10,-4 * np.random.rand()) (log scale) will. I am just accepting the below explanation as it is, But I…
Gurubux
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Coursera's course "How to Win a Data Science Competition"

The Coursera Course "How to Win a Data Science Competition". Has onyone seen it? How is the quality of it? Would you recommend it?
Juan Esteban de la Calle
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Seeking guidance regarding course selection

I have completed Prof. Andrew Ng's Machine Learning Specialization a week ago and now exploring different competitions (Titanic, House Price Prediction, and from the Playground Series). I want to learn more about deep learning and different neural…
Agnij Biswas
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Is R programming a good way to start with Data Science?

I am a software engineer (currently CTO) specialized on web and mobile applications picking up data science skills. I do this mainly for future projects within my startup that works in digital healthcare. For this I have started to learn via…
Ray
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