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SQL statement to select all rows from previous day
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11 Answers
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How do I iterate through each element in an n-dimensional matrix in MATLAB?
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You can use linear indexing to access each element.
for idx = 1:numel(array)
element = array(idx)
....
end
This is useful if you don't need to know what i,j,k, you are at. However, if you don't need to know what index you are at, you are probably better off using arrayfun()
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Reverse colormap in matplotlib
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edited Nov 1 '14 at 5:13
answered Jul 19 '10 at 11:45
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Shortest distance between a point and a line segment
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How to create an array containing 1…N
...r any alternatives to the below for creating a JavaScript array containing 1 through to N where N is only known at runtime.
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How to calculate cumulative normal distribution?
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125
Here's an example:
>>> from scipy.stats import norm
>>> norm.cdf(1.96)
0.97...
How can I select from list of values in SQL Server
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13 Answers
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Efficient way to apply multiple filters to pandas DataFrame or Series
...numpy) allow for boolean indexing, which will be much more efficient:
In [11]: df.loc[df['col1'] >= 1, 'col1']
Out[11]:
1 1
2 2
Name: col1
In [12]: df[df['col1'] >= 1]
Out[12]:
col1 col2
1 1 11
2 2 12
In [13]: df[(df['col1'] >= 1) & (df['col1'] <=1 )]
Out...