Please what is the quickest way to solve this problem? I need help with variable precision integer arithmetic.
Operation with large and small numbers
8 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
1^4 + 1^4 + 23512^4 - 23512^4 = 2
but
Matlab says
1^4 + 1^4 + 23512^4 - 23512^4 = 0.
Antworten (2)
Image Analyst
am 5 Jan. 2023
It's called truncation error. You should have learned about it in your linear algebra or numerical analysis course.
Basically it's caused by adding a gigantic number to a small number (2). There are not enough digits in 64 bits to accurately represent the 2 in the ones column of the number. The number if basically truncated and the 2 and perhaps even some other digits (like the 10's place) are lost.
To fix, use parentheses:
result = (1^4 + 1^4) + (23512^4 - 23512^4)
The first term is 2 and the second term is 0. Those numbers are in the same range and can be added with no truncation.
2 Kommentare
Image Analyst
am 6 Jan. 2023
See the FAQ:
You're still bound by truncation error.
Why is the order important, and why do you have such enormous numbers added to such tiny numbers?
You might have some luck with the symbolic toolbox, but I don't have that so can't advise you on that. Call tech support about that.
Siehe auch
Kategorien
Mehr zu Logical finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!