Multiply two griddedInterpolant functions

2021 10 25
1 个回答
回答已采纳
更新时间：2021 10 25
2 次查看（30 天）

0 个投票

I have some data and I have interpolated them using the function griddedInterpolant. Now, let's suppose I end up with f and g from the previous interpolation. What I want to do now is fun = f*g. I can I do that?
Thanks
Anita

请先登录，再回答此问题。

 采纳的回答

Bjorn Gustavsson
Bjorn Gustavsson 2021-10-25

0 个投票

If you have 2 functions f(x,y) and g(x,y) you can evaluate the product on your selected grid-points and multiply them:
fx_at_xy = f(x,y).*g(x,y);
or you can create a function that multiplies the two:
f_times_g = @(x,y) f(x,y).*g(x,y);
and use that one - this should (at least ought to) be more convenient when for example integrate over some region in the x-y-plane.
HTH

1 个评论
显示 -1更早的评论 隐藏 -1更早的评论

Anita Capelli
Anita Capelli 2021-10-25
编辑：Anita Capelli 2021-10-25
I couldn't do it like this. So I changed and I used instead of griddedInterpolant interp1 creating an handle function. Therefore, supposing to have data_x = [], data_y = [], I created f = @(x) interp1(data_x,data_y,x). The same for g. How should I multiply them? I was doing
h = @(x) f(x).*g(x)
but it says Array indices must be positive integers or logical values.

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Fit Postprocessing 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