Finding difference between two curves

2013 3 4
1 个回答
回答已采纳
4 次查看（30 天）

0 个投票

I am very very new to matlab. I need to find the average of two curves and then subtract it from the third. The problem is that although they have the same limits they do not have the same x-values.

2 个评论
显示 无 隐藏 无

Emma
Emma 2013-3-4
I can't take the means of the points as they have different x-values and therefore are not the same thing. I am looking at temperature vs. signal. Although the data sets are all from 50-900degC they are not at the exact same temperature.

请先登录，再进行评论。

请先登录，再回答此问题。

 采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2013-3-4
编辑：Azzi Abdelmalek 2013-3-4

0 个投票

y1=rand(1,10);
y2=rand(1,12);
y3=rand(1,15);
out=y3-mean([y1 y2])

3 个评论
显示 1更早的评论 隐藏 1更早的评论

Azzi Abdelmalek
Azzi Abdelmalek 2013-3-4
Do you want to interpolate?
Emma
Emma 2013-3-4
I was thinking interpolation between each point or using "fit" as my curves I do not think that my curves will fit to a polynomial (see picture)
Azzi Abdelmalek
Azzi Abdelmalek 2013-3-4
T1=50:20:900
T2=50:25:900
T3=50:30:900
y1=rand(1,numel(T1))
y2=rand(1,numel(T2))
y3=rand(1,numel(T3))
T=unique([T1 T2 T3])
Y1i=interp1(T1,y1,T);
Y2i=interp1(T2,y2,T);
Y3i=interp1(T3,y3,T);
out=Y3i-mean([Y1i;Y2i])

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 Linear and Nonlinear Regression 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