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What is “entropy and information gain”?
I am reading this book ( NLTK ) and it is confusing. Entropy is defined as :
7 Answers
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Create a matrix of scatterplots (pairs() equivalent) in ggplot2
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You might want to try plotmatrix:
library(ggplot2)
data(mtcars)
plotmatrix(mtcars[,1:3])
to me mpg (first column in mtcars) should not be a factor. I haven't checked it, but there's no reason why it should be one. Ho...
Vim: Replacing a line with another one yanked before
At least once per day i have the following situation:
16 Answers
16
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Why does range(start, end) not include end?
gives you
9 Answers
9
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How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators dif
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Difference between == and ===
The difference between the loosely == equal operator and the strict === identical operator is exactly explained in the manual:
Comparison Operators
┌──────────┬───────────┬──────────...
plot a circle with pyplot
surprisingly I didn't find a straight-forward description on how to draw a circle with matplotlib.pyplot (please no pylab) taking as input center (x,y) and radius r. I tried some variants of this:
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How does git merge after cherry-pick work?
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Short answer
Don't worry, Git will handle it.
Long answer
Unlike e.g. SVN1, Git does not store commits in delta format, but is snapshot-based2,3. While SVN would naively try to apply each merged commit as a patch (and fail, for the exact reason y...
How to combine multiple conditions to subset a data-frame using “OR”?
I have a data.frame in R. I want to try two different conditions on two different columns, but I want these conditions to be inclusive. Therefore, I would like to use "OR" to combine the conditions. I have used the following syntax before with lot of success when I wanted to use the "AND" conditio...
How does virtual inheritance solve the “diamond” (multiple inheritance) ambiguity?
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You want: (Achievable with virtual inheritance)
A
/ \
B C
\ /
D
And not: (What happens without virtual inheritance)
A A
| |
B C
\ /
D
Virtual inheritance means that there will be only 1 ...
Why when a constructor is annotated with @JsonCreator, its arguments must be annotated with @JsonPro
In Jackson, when you annotate a constructor with @JsonCreator , you must annotate its arguments with @JsonProperty . So this constructor
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