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5
votes
2answers
1k views

Performance and other issues with using floating point types in C++

Being interested in C++ performance programming there is one aspect I really have no clue about- and that is the implications of using floating point calculations vs doubles vs normal integer ...
40
votes
12answers
3k views

Is there an alternative to bits?

Is there an alternative to bits as the smallest unit of data? Something that won't be only 0 or 1, but actually hold many possible states in between? Wouldn't it be more natural to store floats like ...
-2
votes
1answer
2k views

in Objective-C, value of type double/float can only be NAN, INFINITY, & normal number?

I knew double or float value can be not only normal value(-1.3, 0, 1.0, 2.3) but also NAN and INFINITY in Objective-C. Is there other special values except for NAN and INFINITY for double/float value ...
26
votes
12answers
3k views

Why do you need float/double?

I was watching http://www.joelonsoftware.com/items/2011/06/27.html and laughed at Jon Skeet joke about 0.3 not being 0.3. I personally never had problems with floats/decimals/doubles but then I ...
6
votes
2answers
958 views

How to remove the boundary effects arising due to zero padding in scipy/numpy fft?

I have made a python code to smoothen a given signal using the Weierstrass transform, which is basically the convolution of a normalised gaussian with a signal. The code is as follows: #Importing ...
0
votes
2answers
2k views

Can anyone explain representation of float in memory?

This is not duplicate question as I read the previous question. Can anyone help me in understanding how float values are stored in the memory . My doubt is here float values contain '.' (for example ...
6
votes
2answers
990 views

Solutions for floating point rounding errors

In building an application that deals with a lot of mathematical calculations, I have encountered the problem that certain numbers cause rounding errors. While I understand that floating point is not ...
27
votes
6answers
10k views

What causes floating point rounding errors?

I am aware that floating point arithmetic has precision problems. I usually overcome them by switching to a fixed decimal representation of the number, or simply by neglecting the error. However, I ...
3
votes
1answer
660 views

Dummy float values to force floating-point operations

It is common to use idioms such as: x/60.0 to force a floating-point division when x is an integer in languages which do not have distinct operators for integer and decimal division. Is this an ...
0
votes
1answer
498 views

Conversion of a number from Single precision floating point representation to a Half precision floating point [closed]

I have a code where I have to work on Half precision floating point representation numbers. To achieve that I have created my own C++ class fp16 with all operators(arithmetic logical, relational) ...