Recent questions tagged Floating

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floating point - Does setprecision in c++ round? If so why am I seeing this?

The following snippet outputs 0.29847 when I would have expected 0.29848: double f = 0.298475; cout << ... << endl; outputs: 0.12345 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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floating point - Why does table-based sin approximation literature always use this formula when another formula seems to make more sense?

The literature on computing the elementary function sin with tables refers to the formula: sin(x) = sin(Cn) * ... look at the complete program. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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floating point - Precision lost in float value using java

Given below the test code and its output. When I get float value from number value, precision is lost.. ... value lesser than Float.MAX_VALUE? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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floating - How do I get a float value when dividing two integers? (PHP)

Hi I am trying to divide two integers ex: 12/13 but I always get a whole integer 1 not a decimal number. I ... Would like to see 0.923 not 1 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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floating point - In Python small floats tending to zero

I have a Bayesian Classifier programmed in Python, the problem is that when I multiply the features probabilities I ... there is a better way? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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floating point - better understanding type promotion of variadic parameters in c

When a variable argument function is called in c the integer parameters are promoted to int and floating point ... unless loosing some bits See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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floating accuracy - php intval() and floor() return value that is too low?

Because the float data type in PHP is inaccurate, and a FLOAT in MySQL takes up more space than an INT (and ... is floor(115) returning 114?? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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floating point - Could not find an overload for '*' that accepts the supplied argument

I have converted a String to an Int by by using toInt(). I then tried multiplying it by 0.01, but I get ... help clarify what the issue may be? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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floating point - Check if a double is evenly divisible by another double in C?

How can I check if a double x is evenly divisible by another double y in C? With integers I would just use ... but where would I go from then? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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floating point - Checking if float is equivalent to an integer value in python

In Python 3, I am checking whether a given value is triangular, that is, it can be represented as n(n+1)/2 ... I am not sure about Python 3. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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624 views

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floating point - decode rgb value to single float without bit-shift in glsl

I'm currently busy with deferred shading in webgl and i need to decode 3 integer value's (in the range [0..256] = ... b) / 256.0; } thanks.. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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floating point - Can a variable be used in Python to define decimal places

I'm familiar with the convention of using %.2f to set two decimal places for a float but is it in ... the number of decimal places displayed? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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405 views

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floating point - How can I make sure a float will always be rounded up with PHP?

I want to make sure a float in PHP is rounded up if any decimal is present, without worrying about mathematical ... any easy way to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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619 views

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floating point - Float to binary in C++

I'm wondering if there is a way to represent a float using a char in C++? For example: int main() { float ... in a char array of 4 elements? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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772 views

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floating point - Convert "float" to bytes in Javascript without Float32Array

Okay so I'm an a fairly annoying situation where I don't have access to typed arrays such as Float32Array, ... -bit version myself from there. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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328 views

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floating point - Implementation of sinpi() and cospi() using standard C math library

The function sinpi(x) computes sin(πx), and the function cospi(x) computes cos(πx), where the ... efficient and standard compliant fashion? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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752 views

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floating point - Go float comparison

In order to compare two floats (float64) for equality in Go, my superficial understanding of IEEE 754 and binary ... to make it more clear. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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523 views

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floating point - Extract fractional part of double *efficiently* in C

I'm looking to take an IEEE double and remove any integer part of it in the most efficient manner possible ... want it to efficiently vectorize. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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609 views

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floating action button - Error inflating class android.support.design.widget.CoordinatorLayout

I would like use a FloatingActionButton on my application, I read this : https://guides.codepath.com/android/Floating-Action- ... -v7:21.0.+' } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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589 views

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floating point - Round a double in Java

I have found this great solution for rounding: static Double round(Double d, int precise) { BigDecimal bigDecimal = new ... using jre 1.7.0_45. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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566 views

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floating point - Python, print all floats to 2 decimal places in output

I need to output 4 different floats to two decimal places. This is what I have: print '%.2f' % var1,'kg =','% ... %.2f'? Note: Using Python 2.6. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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618 views

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floating point - How to convert float number to Binary?

Can anyone please tell me how can I convert this float number: 12.25 to binary? I know how to convert ... Any help is much appreciated. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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513 views

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floating point - double arithmetic and equality in Java

Here's an oddity (to me, at least). This routine prints true: double x = 11.0; double y = 10.0; if ... (other than 10) that have this property? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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floating point - Standard for the sine of very large numbers

I am writing an (almost) IEEE 854 compliant floating point implementation in TeX (which only has support ... floating point implementations do? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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532 views

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floating point - Is 3*x+x always exact?

Assuming strict IEEE 754 (no excess precision) and round to nearest even mode, is 3*x+x always == 4*x (and ... == y is not generally true... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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661 views

1 answer

floating point - How can I use a HashMap with f64 as key in Rust?

I want to use a HashMap<f64, f64>, for saving the distances of a point with known x and key y to ... lies only in the hashing or iterating. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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528 views

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floating point - Rule of thumb to test the equality of two doubles in C#?

Let's say I have some code that does some floating point arithmetic and stores the values in doubles. ... size of the equivalence window. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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580 views

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floating point - Round a float up to the next integer in javascript

I need to round floating point numbers up to the nearest integer, even if the number after the point is less ... can I do this in JavaScript? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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