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MySQL: What's the difference between float and double?
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They both represent floating point numbers. A FLOAT is for single-precision, while a DOUBLE is...
How to define a two-dimensional array?
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1039
You're technically trying to index an uninitialized array. You have to first initialize the o...
How many double numbers are there between 0.0 and 1.0?
...or example, that's the number of distinct doubles between 0.5 included and 1.0 excluded, and exactly that many also lie between 1.0 included and 2.0 excluded, and so forth.
Counting the doubles between 0.0 and 1.0 is harder than doing so between powers of two, because there are many powers of two i...
Get the week start date and week end date from week number
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Frequency table for a single variable
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153
Maybe .value_counts()?
>>> import pandas
>>> my_series = pandas.Series([1,2...
Concatenating two one-dimensional NumPy arrays
... as separate arguments.
From the NumPy documentation:
numpy.concatenate((a1, a2, ...), axis=0)
Join a sequence of arrays together.
It was trying to interpret your b as the axis parameter, which is why it complained it couldn't convert it into a scalar.
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What is the most efficient way to create a dictionary of two pandas Dataframe columns?
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196
In [9]: pd.Series(df.Letter.values,index=df.Position).to_dict()
Out[9]: {1: 'a', 2: 'b', 3: 'c...
How do I concatenate or merge arrays in Swift?
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Get distance between two points in canvas
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You can do it with pythagoras theorem
If you have two points (x1, y1) and (x2, y2)
then you ca...
Grouping functions (tapply, by, aggregate) and the *apply family
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