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Cosine Similarity between 2 Number Lists
...te the cosine similarity between two lists , let's say for example list 1 which is dataSetI and list 2 which is dataSetII . I cannot use anything such as numpy or a statistics module. I must use common modules (math, etc) (and the least modules as possible, at that, to reduce time spent).
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How to find the length of a string in R
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See ?nchar. For example:
> nchar("foo")
[1] 3
> set.seed(10)
> strn <- paste(sample(LETTERS, 10), collapse = "")
> strn
[1] "NHKPBEFTLY"
> nchar(strn)
[1] 10
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Assign output of a program to a variable using a MS batch file
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One way is:
application arg0 arg1 > temp.txt
set /p VAR=<temp.txt
Another is:
for /f %%i in ('application arg0 arg1') do set VAR=%%i
Note that the first % in %%i is used to escape the % after it and is needed when using the above code in a batch ...
Should I use multiplication or division?
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Python:
time python -c 'for i in xrange(int(1e8)): t=12341234234.234 / 2.0'
real 0m26.676s
user 0m25.154s
sys 0m0.076s
time python -c 'for i in xrange(int(1e8)): t=12341234234.234 * 0.5'
real 0m17.932s
user 0m16.481s
sys 0m0.048s
multiplication i...
What's the better (cleaner) way to ignore output in PowerShell? [closed]
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184
I just did some tests of the four options that I know about.
Measure-Command {$(1..1000) | Ou...
How can I create a two dimensional array in JavaScript?
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Converting string into datetime
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from datetime import datetime
datetime_object = datetime.strptime('Jun 1 2005 1:33PM', '%b %d %Y %I:%M%p')
The resulting datetime object is timezone-naive.
Links:
Python documentation for strptime: Python 2, Python 3
Python documentation for strptime/strftime format strings: Python 2, Pyth...
PHP append one array to another (not array_push or +)
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12 Answers
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Get difference between two lists
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1276
In [5]: list(set(temp1) - set(temp2))
Out[5]: ['Four', 'Three']
Beware that
In [5]: set([...
MySQL ERROR 1045 (28000): Access denied for user 'bill'@'localhost' (using password: YES)
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