How to avoid error calculation going to infinity when dividing by near-zero values?
27 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Hello,
I am calculating the relative error between two signals using the next equation:
relative_error(i) = abs((measured(i)-estimated(i))./measured(i))*100;
The problem arises when measured is zero or near zero that relative_error explodes.
Do you know a more appropriated way of calculating an error between two signals that avoids this problem?
Thanks,
Cerilet
0 comentarios
Respuestas (1)
Honglei Chen
el 24 de Oct. de 2017
There are several ways to handle this, for example, you can add one more line to set all those points to a predefined value
relative_error(i) = abs((measured(i)-estimated(i))./measured(i))*100;
relative_error(measured==0) = 1; % say predefined value is 1
Or just add an epsilon to avoid this issue
epsilon = 1e-8;
relative_error(i) = abs((measured(i)-estimated(i))./(measured(i)+epsilon))*100;
HTH
0 comentarios
Ver también
Categorías
Más información sobre Matched Filter and Ambiguity Function en Help Center y File Exchange.
Productos
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!