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Why does one hot encoding improve machine learning performance?

...h" and "US". Assume, without loss of generality, that these are encoded as 0, 1 and 2. You then have a weight w for this feature in a linear classifier, which will make some kind of decision based on the constraint w×x + b > 0, or equivalently w×x < b. The problem now is that the weight w c...
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How does numpy.histogram() work?

...qual width) of each bar. In this example: np.histogram([1, 2, 1], bins=[0, 1, 2, 3]) There are 3 bins, for values ranging from 0 to 1 (excl 1.), 1 to 2 (excl. 2) and 2 to 3 (incl. 3), respectively. The way Numpy defines these bins if by giving a list of delimiters ([0, 1, 2, 3]) in this example...
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jQuery : eq() vs get()

... answered Jan 17 '11 at 3:09 StevenSteven 16.8k1212 gold badges5959 silver badges112112 bronze badges ...
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How to overcome TypeError: unhashable type: 'list'

... As indicated by the other answers, the error is to due to k = list[0:j], where your key is converted to a list. One thing you could try is reworking your code to take advantage of the split function: # Using with ensures that the file is properly closed when you're done with open('filename....
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How do I get the time of day in javascript/Node.js?

...he getHours() method for the Date object. getHours() return the time from 0 - 23, so make sure to deal with it accordingly. I think 0-23 is a bit more intuitive since military time runs from 0 - 23, but it's up to you. With that in mind, the code would be something along the lines of: var date = ...
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Add zero-padding to a string

How do I add "0" padding to a string so that my string length is always 4? 5 Answers 5...
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add a string prefix to each value in a string column using Pandas

...['col'].astype(str) Example: >>> df = pd.DataFrame({'col':['a',0]}) >>> df col 0 a 1 0 >>> df['col'] = 'str' + df['col'].astype(str) >>> df col 0 stra 1 str0 share ...
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What does multicore assembly language look like?

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how to find host name from IP with out login to the host

... Use nslookup nslookup 208.77.188.166 ... Non-authoritative answer: 166.188.77.208.in-addr.arpa name = www.example.com. share | improve this ...
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How to change colors of a Drawable in Android?

... I think you can actually just use Drawable.setColorFilter( 0xffff0000, Mode.MULTIPLY ). This would set white pixels to red but I don't think it would affect the transparent pixels. See Drawable#setColorFilter ...