why gradient and diff return many values?

1 次查看（过去 30 天）
huda nawaf
huda nawaf 2021-3-7
评论： huda nawaf 2021-3-7
hello,
I need use the derivatives for example in loss function is J(w,b) such that find
w=w-α * (∂J/ ∂w)
when I used diff or gradient I have many values, In fact I need only one value represent (∂J/ ∂w).
Please, can one help me to provide me with that command.
Thanks in advance
  4 个评论
显示 2更早的评论
dpb
dpb 2021-3-7
How well it would work or even be reasonable would be entirely dependent upon the problem characteristics but one could try mean(gradient()) to get an average to reduce a vector to one value.
huda nawaf
huda nawaf 2021-3-7
@ Jan
In fact I just need compute the derivative, and I know when compute the derivative for one variable I shoud get one value.
@ KALYAN ACHARJYA
that is mean I did not use the right command. I want to calculate the derivative for one variable respect to functionnd

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Image Quality 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