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Normalize data in pandas
... b c d
A -0.488816 0.863769 4.325608 -4.721202
B -11.937097 2.993993 -12.916784 -1.086236
C -5.569493 4.672679 -2.168464 -9.315900
D 8.892368 0.932785 4.535396 0.598124
In [93]: df_norm = (df - df.mean()) / (df.max() - df.min())
In [94]: df_norm
Out[94]:
...
ActiveRecord: List columns in table from console
......)
In rails four, you need to establish a connection first:
irb(main):001:0> User
=> User (call 'User.connection' to establish a connection)
irb(main):002:0> User.connection; nil #call nil to stop repl spitting out the connection object (long)
=> nil
irb(main):003:0> User
User(id...
How do I clear only a few specific objects from the workspace?
...at if I want to remove all variables with names start with letter A, say 'A001', 'A002'.... 'A999'. I don't want to type so many variable names. Thanks!
– user3768495
Sep 22 '15 at 16:04
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Why does sizeof(x++) not increment x?
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edited Nov 24 '11 at 9:05
Nawaz
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How do I create a variable number of variables?
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94
Use the built-in getattr function to get an attribute on an object by name. Modify the name as...
What's the best way to learn LISP? [closed]
...format. I highly recommend it.
http://groups.csail.mit.edu/mac/classes/6.001/abelson-sussman-lectures/
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extra qualification error in C++
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211
This is because you have the following code:
class JSONDeserializer
{
Value JSONDeserializ...
Measure and Benchmark Time for Ruby Methods
...o test
}
puts time.real #or save it to logs
end
Sample output:
2.2.3 :001 > foo
5.230000 0.020000 5.250000 ( 5.274806)
Values are: cpu time, system time, total and real elapsed time.
Source: ruby docs.
shar...
How do I create a SHA1 hash in ruby?
...hers hash algorithms.
– jwfearn
Jun 11 '12 at 18:07
FYI, you should use Digest::SHA2.hexdigest now as it is more secur...
Convert datetime object to a String of date only in Python
...00, ..., 99
%Y Year with century as a decimal number. 1970, 1988, 2001, 2013
%H Hour (24-hour clock) as a zero-padded decimal number. 00, ..., 23
%I Hour (12-hour clock) as a zero-padded decimal number. 01, ..., 12
%p Locale’s equivalent of either AM or PM.
%M Minute...