What are the values of single?

Question

tomer kapuri 2018-12-1

0
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编辑： John D'Errico 2018-12-1

Maximum values and minimum values ( negative and positive)?

I could not understand..

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dpb 2018-12-1

See if https://www.mathworks.com/help/matlab/matlab_prog/floating-point-numbers.html will help...

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Answer 1

John D'Errico 2018-12-1

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https://ww2.mathworks.cn/matlabcentral/answers/433181-what-are-the-values-of-single#answer_349982

编辑：John D'Errico 2018-12-1

在 MATLAB Online 中打开

realmax('single')
ans =
  single
   3.4028e+38
   
-realmax('single')
ans =
  single
  -3.4028e+38

The sign is not relevant. And I'm not sure what you don't understand so perhaps you need to explain what is the question. A single precision number in MATLAB floating point is composed of a sign bit, an exponent stuffed into 8 bits, and a mantissa encoded as 23 binary bits, for a total of 32 bits (4 hex bytes) of information. dpb gave a useful reference that explains the basics.