data-science-from-scratch

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minor notes

1

minor notes for author revision - second edtion. Thanks for the great book.

giordafrancis

There is no example for Stochastic Gradient Descent in Chapter 8

1

There is no example for Stochastic Gradient Descent in Chapter 8. I have tried to write one. ``` print("using minimize_stochastic_batch") x = list(range(101)) y = [3*x_i + random.randint(-10, 20) for...

chengjun

You say: call make_hist(0.75, 100, 10000) but you must mean: call binomial_histogram(0.75, 100, 10000)

melling

PCA example

1

Why does the PCA example returns components with the opposite sign of the ones from sklearn PCA? Also, when I try to standardize the data and use the code, the...

paulaceccon

Invalid Syntax at line: 82

2

# Problem File ".\Friends.py", line 82 print friends_of_friend_ids(users["3"]) # Counter({0: 2, 5: 1})

andreoliveirapguerra

Crashcourse to Python - defaultdict

1

Hi, I got a problem in Chapter 2 (German version) with example about "Defaultdict" and also "Counter". Whats seems to be left out here is, how the value "document" has...

felix4webscience

The number calculating mistakes in introduction.py

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The number calculating mistakes in introduction.py The length of the `users` list is 11 not 10 so the answer of average user's friends is 2.182 instead of 2.4. ``` num_users...

iphyer

Hey @joelgrus , I would like to thank you for all the work you are doing here. I would still like to recommend one or two improvements for your new...

felix4webscience

Since Python 3 doesn't allow `map` to be iterable, a workaround is to turn the outcome to a list in order to plot.

gomesfernanda

Fix gradient descent example for Python 3

2

The example producing Figure 8-3 in the book doesn't work in Python 3, apparently because the iterator returned by `map()` doesn't work with pyplot, so using a list comprehension here...

naoyak