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How to calculate mantissa of 0.5

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Osamah Alayafi
Osamah Alayafi on 17 Sep 2021 at 20:59
Commented: Star Strider on 17 Sep 2021 at 21:32
Is there any function to calculate the mantissa of 0.8 by matlab?

Accepted Answer

Star Strider
Star Strider on 17 Sep 2021 at 21:09
I created a little utility function to calculate the mantissa and exponent of a floating-point number a while ago, for my own use.
Trying it here —
expstr = @(x) [x(:).*10.^ceil(-log10(abs(x(:)+(x==0)))) floor(log10(abs(x(:)+(x==0))))];
expstr([0.5; 0.8])
ans = 2×2
5 -1 8 -1
The mantissa is the first element and the exponent is the second element in each row.
.
  2 Comments
Star Strider
Star Strider on 17 Sep 2021 at 21:32
My pleasure!
Yes.
The exponent (in this instance) is -1.
.

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