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Getting the count of unique values in a column in bash
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To see a frequency count for column two (for example):
awk -F '\t' '{print $2}' * | sort | un...
Why are elementwise additions much faster in separate loops than in a combined loop?
Suppose a1 , b1 , c1 , and d1 point to heap memory and my numerical code has the following core loop.
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How can I extract a good quality JPEG image from a video file with ffmpeg?
...le:v (or the alias -q:v) as an output option.
Normal range for JPEG is 2-31 with 31 being the worst quality.
The scale is linear with double the qscale being roughly half the bitrate.
Recommend trying values of 2-5.
You can use a value of 1 but you must add the -qmin 1 output option (because the de...
What is the JavaScript >>> operator and how do you use it?
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It doesn't just convert non-Numbers to Number, it converts them to Numbers that can be expresse...
Check if a string contains an element from a list (of strings)
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how to get the last character of a string?
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Best way to simulate “group by” from bash?
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Finding median of list in Python
...ated by taking the average of the two middle values:
>>> median([1, 3, 5])
3
>>> median([1, 3, 5, 7])
4.0
Usage:
import statistics
items = [6, 1, 8, 2, 3]
statistics.median(items)
#>>> 3
It's pretty careful with types, too:
statistics.median(map(float, items))
#&...
On select change, get data attribute value
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edited May 29 '13 at 0:12
answered Dec 1 '11 at 17:32
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How to reshape data from long to wide format
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