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pandas DataFrame: replace nan values with average of columns

...ne it like this: We have 100 data rows and we consider column x. The first 99 entries of x are NA. We want to split off row 100 as a test set. Let's assume row 100 has value 20 in column x. Then you will replace all entries in the training set in column x with 20, a value coming 100% from the test s...
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What is the maximum value for an int32?

... When you are programming: yes in 99% of cases. But you may want to know that it's something like ~ 2 billion to planning programming approaches or when working with data, although it's a very large number. :) – Andre Figueiredo ...
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What is the length of the access_token in Facebook OAuth2?

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Difference between del, remove and pop on lists

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How to exit in Node.js

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nginx - nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)

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Declaring Multiple Variables in JavaScript

... Adam Lee 1,24611 gold badge99 silver badges1414 bronze badges answered Jul 21 '16 at 14:36 Nir NaorNir Naor ...
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Maven artifact and groupId naming

... Dmitry Timofeev 15411 silver badge99 bronze badges answered Sep 16 '10 at 10:51 Henryk KonsekHenryk Konsek 8,470...
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iOS JavaScript bridge

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ASP.NET MVC: Custom Validation by DataAnnotation

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