Questions tagged [floating-point]
For challenges which are specific to numbers represented in floating-point format.
37 questions
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Float vs Decimal
You will be given a decimal number n in the form of a string. You must determine if that number, when stored in standard number type ...
- 2,407
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2
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557
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Largest possible relative error
Output
\$20\$ float64s with absolute value between 1 and 2 inclusive whose sum has the largest possible relative error. We can assume the true sum is not zero.
The sum is to be computed from left to ...
- 3,177
13
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14
answers
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NaN is not equal to NaN
In many programming languages, the floating-point value NaN, or "not a number", in some programming languages generated by the expression ...
- 1,531
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Find 10 float64s that give the least accurate sum
Input
Integer \$n > 1\$
Output
Ten 64 bit floating point numbers between \$-n\$ and \$n\$, inclusive, whose sum is the least accurate.
Details and examples.
These examples are not claimed to be ...
- 3,177
18
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21
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Vanilla Natural Logarithm Challenge
There is a challenge for multiplying two numbers so I guess this counts too
Given as input a positive real number n compute its natural logarithm.
Your answer ...
- 14.5k
11
votes
4
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Implement Perceptron
There was a previous perceptron question but it was closed. Also it required a lot of extra stuff that's not normally part of the perception algorithm like I know it. This question will be much ...
- 14.5k
20
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21
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Convert an integer to IEEE 754 float
The task is simple: given a 32 bit integer, convert it to its floating point value as defined by the IEEE 754 (32-bit) standard.
To put it another way, interpret the integer as the bit-pattern of an ...
- 1,665
8
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2
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315
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Implement Level-Index Addition
Level-index is a system of representing numbers which has been proposed as an alternative to floating-point formats. It claims to virtually eliminate overflow (and underflow, in its symmetric form) ...
- 22.9k
18
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22
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Cartesian - polar conversion couple
We don't have a challenge for conversion between Cartesian and polar coordinates, so ...
The challenge
Write two programs (or functions) in the same language:
one that converts from polar to ...
- 107k
10
votes
9
answers
610
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Durable Durations
Introduction
Time is a really simple concept. Seconds pass, one after the other, all the same. But humans love making it hard. This Stackoverflow question has gathered many answers and even though ...
21
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14
answers
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Bitwise XOR of floats
This is different from Floating Point XOR, and more in the spirit of a comment by R.. GitHub STOP HELPING ICE on that challenge, but I thought of this idea independently.
Generalized XOR
The bitwise ...
- 313
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8
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KotH - Floating Point Prisoners Dilemma
Background
So, nowadays the popular Prisoner's Dilemma variant is the Prisoner's Trilemma, where there are three options. I can easily see that being increased, so I figured
Why settle for three ...
- 189
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Best Rolling Ao5
In speedcubing, an Ao5 (Average of 5) is computed for a set of five times by removing the fastest and slowest times, and then computing the mean of the remaining three times.
A "rolling ao5" ...
- 12.5k
26
votes
8
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Implement Ash's float division
Ash has a bit of an interesting float division algorithm. It's designed to never return NaN, and things like signed zero and infinity need to be handled.
How it ...
- 19.4k