Finding coefficients of quadratic equation without Symbolic Toolbox.
5 次查看(过去 30 天)
显示 更早的评论
I have an equation in the form X = Y/(Y + A + BY + CY^2), where X and Y are known. I need to find out the coefficients A, B and C. And, I don't have the Symbolic Toolbox. I tried it using the polyfit function but was unsuccessful. I have a matrix from where I can extract the values for X and Y.
Any suggestions??
Thanks
1 个评论
Star Strider
2012-9-17
Do you have the Optimization Toolbox or the Statistics Toolbox?
Are X and Y vectors or scalars?
回答(1 个)
José-Luis
2012-9-17
You don't really need the symbolic toolbox for that. For instance, one of the solutions will always be a = y/x, b = -1 and c = 0. If you need more solutions then you just plug in whatever you want to two of the three coefficients and calculate the last one.
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Quadratic Programming and Cone Programming 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!