How to set x > 0, at 2nd order polynomial using polyfit.
1 次查看(过去 30 天)
显示 更早的评论
Hi I need help, I have imported a txt file into my matlab and have set the x and y value, then I got stuck to create the line on graph at x > 0. Below is my normal code without set x > 0.
p2 = polyfit(x,y,2);
f = polyval(p2,x);
plot(x,f,'-')
0 个评论
采纳的回答
KSSV
2021-5-6
idx = x > 0 ;
x = x(idx);
y = y(idx) ;
p2 = polyfit(x,y,2);
f = polyval(p2,x);
plot(x,f,'-')
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Introduction to Installation and Licensing 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!