fir1 in R2021b vs R2017

2 次查看（过去 30 天）
gim hom
gim hom 2021-10-28
回答： gim hom 2021-10-28
I noticed fir1 produces different results in R2021b vs R2017. In 2017 coe17=fir1(30, 3000/48000) results in
coe17 =
-0.0006 -0.0014 -0.0027 -0.0044 -0.0062 -0.0070 -0.0054 0.0000
0.0102 0.0255 0.0452 0.0673 0.0892 0.1078 0.1203 0.1247
0.1203 0.1078 0.0892 0.0673 0.0452 0.0255 0.0102 0.0000
-0.0054 -0.0070 -0.0062 -0.0044 -0.0027 -0.0014 -0.000
coe21 = fir1(30,3000/48000)
coe21 =
0.0004 0.0010 0.0020 0.0039 0.0069 0.0112 0.0170 0.0240
0.0322 0.0411 0.0501 0.0586 0.0660 0.0718 0.0755 0.0768
0.0755 0.0718 0.0660 0.0586 0.0501 0.0411 0.0322 0.0240
0.0170 0.0112 0.0069 0.0039 0.0020 0.0010 0.0004
Why is there a difference?
  1 个评论
Star Strider
Star Strider 2021-10-28
I have not noticed any difference (I no longer have access to either of the R2017 releases) however it does not appear to have changed in any way over those years according to the Release Notes.
.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Walter Roberson
Walter Roberson 2021-10-28
I just tested with R2017a and R2021b on my system. The results were bit-for-bit identical between the two systems.
Question: do you happen to have an AMD cpu ?
gim hom
gim hom 2021-10-28
Thanks for such fast replies. Turns out to be a flaky CPU. R2017 was on an old machine.

类别

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

标签

产品


版本

R2021b

Community Treasure Hunt

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

Start Hunting!

Translated by