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what is the difference between 'transform' and 'fit_transform' in sklearn
... already called its .fit method.
In [12]: pc2 = RandomizedPCA(n_components=3)
In [13]: pc2.transform(X) # can't transform because it does not know how to do it.
---------------------------------------------------------------------------
AttributeError Traceback (most rece...
Difference between “include” and “require” in php
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edited May 23 '17 at 11:33
Community♦
111 silver badge
answered Sep 3 '10 at 7:53
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Why were pandas merges in python faster than data.table merges in R in 2012?
... coerce character to
factor. Factors are still supported. Implements FR#1493, FR#1224
and (partially) FR#951.
New functions chmatch() and %chin%, faster versions of match()
and %in% for character vectors. R's internal string cache is
utilised (no hash table is built). They are about 4 times faster
t...
XML Document to String
...the simplest way to get the String representation of a XML Document ( org.w3c.dom.Document )? That is all nodes will be on a single line.
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Iterate over object keys in node.js
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edited Feb 17 '15 at 15:34
thepeer
7,82122 gold badges1515 silver badges1313 bronze badges
answered Se...
Convert a character digit to the corresponding integer in C
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153
As per other replies, this is fine:
char c = '5';
int x = c - '0';
Also, for error checking, ...