- Tue 14 November 2017
- HowTo

#### The importance of order

When grouping by DataFrame the order does matter and may be surprising.

- Tue 14 November 2017
- HowTo

When grouping by DataFrame the order does matter and may be surprising.

- Sat 02 September 2017
- Stats

Trying to give an intuitive understanding what's the difference between a biased and unbiased estimators of variance of a sample.

- Mon 28 August 2017
- HowTo

A gotcha when aggregated time series data involving hourly based counts.

- Mon 03 July 2017
- HowTo

(Original notebooks can be found in this gist) Assume you have data set as follows: ID Date Value x x x where each row contains an ID, a date (given as pd.Datetime) and a value. The objective is to count how many rows occur in each day. import pandas …

- Tue 27 June 2017
- DS

Benchmarking different ways to process two columns simultaneously.

- Fri 26 May 2017
- General

TL;DR The function pandas.DataFrame.values is not the inverse of pd.DataFrame(np.array). Introduction An important part of reproducible data science work, is the ability to apply the DAG on the very same dataset. Simplest option is to commit the datasets to a VCS like git. This …