finding point on a function
3 次查看(过去 30 天)
显示 更早的评论
I have a function P using polyfit. How can I find the corrdinate on P when x=a?
0 个评论
回答(2 个)
Ameer Hamza
2020-12-9
You can use polyval()
xv; % x data-points
yv; % y data-points
p = polyfit(xv, yv, 3);
x = a;
y = polyval(p, x);
0 个评论
KSSV
2020-12-9
Read about interp1.
Let (x,y) be your data.
xi = a ;
yi = interp1(x,y,xi) ;
[xi yi]
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Surface and Mesh Plots 的更多信息
产品
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!