OneTask#data
Every post tagged #data. All posts.
Scatter plot or line chart? How to choose
The difference between a scatter plot and a line chart, when joining the points misleads, what a trend line and correlation coefficient tell you, and what to use when there are too many points to see.
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Regular expressions for everyday text jobs
The handful of regex pieces that cover most real tasks, with worked examples for finding emails, tidying spaces, reformatting dates and pulling numbers out of text, and the mistakes that trip people up.
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BMI for women, what the number tells you and what it leaves out
How BMI is calculated, the WHO categories, why the same formula is used for women and men, and the things it cannot see, from body fat and muscle to pregnancy and age.
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