Numerical errors of basic multiple
17 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
yifwang
el 26 de Ag. de 2019
Comentada: yifwang
el 26 de Ag. de 2019
When using matlab multiple calculation, some errors happen
a = 7*13e-6;
b = 6*13e-6;
the answer is
a = 9.09999999999999999e-5
b = 7.80000000000000000e-5
erroe happened at a but not at b;
So how this error happen and how * works? On what condition the error happen?
2 comentarios
KALYAN ACHARJYA
el 26 de Ag. de 2019
Error?
>> a =13e-6
a =
1.300000000000000e-05
>> 7*a
ans =
9.099999999999999e-05
Respuesta aceptada
Ted Shultz
el 26 de Ag. de 2019
These are floating point calculations. Not every number can be represented, and this rounding error can compound when you do math with these imperfect numbers.
"Floating-point error arises because real numbers cannot, in general, be accurately represented in a fixed space."
1 comentario
Ted Shultz
el 26 de Ag. de 2019
Here is a thread, with links to other threads that address this in more detail:
Más respuestas (0)
Ver también
Categorías
Más información sobre Logical en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!