Relative error: not able to get the right answer.

1 次查看（过去 30 天）
Krishma Gold
Krishma Gold 2019-9-3
回答： Star Strider 2019-9-3
Hi. I am not able to get the correct value of the relative error. Grateful if you please help.
real val approx val relative error
7000 7000 0
5261 5160 1.92
4657 4869 -4.03
Matlab code:
tval = [7000 5261 4657]'
fcast = [7000 5160 4869 ]'
eabs = (tval-fcast)
erel = eabs/tval*100
Ans:
erel =
0 0 0 0 0
1.2625e+000 0 0 0 0
-2.6500e+000 0 0 0 0
Thank you

请先登录，再回答此问题。

回答（1 个）

Star Strider
Star Strider 2019-9-3
You need to do element-wise division:
erel = eabs./tval*100
↑
Then it comes close tho the result you want.

类别

在 Help Center 和 File Exchange 中查找有关 Programming 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by