math Archives - Page 5 of 8

What is “entropy and information gain”?

I am reading this book (NLTK) and it is confusing. Entropy is defined as: Entropy is the sum of the probability of each ...

May 12, 2022
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How to evaluate a math expression given in string form?

I’m trying to write a Java routine to evaluate math expressions from String values like: "5+3" "10-40" "(1+10)*3" I want to avoid a ...

May 10, 2022
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How to round up the result of integer division?

I’m thinking in particular of how to display pagination controls, when using a language such as C# or Java. If I have x ...

May 10, 2022
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Fastest way to list all primes below N

This is the best algorithm I could come up. def get_primes(n): numbers = set(range(n, 1, -1)) primes =...

May 9, 2022
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Fastest way to determine if an integer is between two integers (inclusive) with known sets of values

Is there a faster way than x >= start && x <= end in C or C++ to test if an integer is ...

May 8, 2022
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Calculate distance between 2 GPS coordinates

How do I calculate distance between two GPS coordinates (using latitude and longitude)? 31 Answers 31 Calculate the distance between two coordinates by ...

May 7, 2022
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Is there a standard sign function (signum, sgn) in C/C++?

I want a function that returns -1 for negative numbers and +1 for positive numbers. http://en.wikipedia.org/wiki/Sign_function It’s easy enough to write my own, ...

May 4, 2022
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Difference between Math.Floor() and Math.Truncate()

What is the difference between Math.Floor() and Math.Truncate() in .NET? 13 s 13 Math.Floor rounds down, Math.Ceiling rounds up, and Math.Truncate rounds towards ...

May 4, 2022
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What is the standard way to add N seconds to datetime.time in Python?

Given a datetime.time value in Python, is there a standard way to add an integer number of seconds to it, so that 11:34:59 ...

May 4, 2022
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JavaScript math, round to two decimal places [duplicate]

This question already has answers here: How to round to at most 2 decimal places, if necessary? (89 answers) Closed 4 years ago. ...

May 3, 2022
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