How to use user input for fittype function
显示 更早的评论
I want to take user inputs for a function and in turn use it in the fittype function. I realize that the fittype uses only string values so I converted my input to a string. However it is still not working and it keeps giving me this:
Error using fittype Expected a string for the parameter name, instead the input type was 'cell'.
Here is my code:
g=input('input your function','s')
f = fittype('g',{g});
nargs = numargs(f)
args = argnames(f)
args=sym(args)
and this is my input that I'm using for g:
a*x^2+b*exp(n*x)
Thanks
采纳的回答
Javier Bastante
2016-3-16
Try this:
ft = fittype( 'a*x^2+b*exp(n*x)', 'independent', 'x', 'dependent', 'y' )
2 个评论
Josiah McCarther
2016-3-24
Javier Bastante
2016-3-25
编辑：Javier Bastante
2016-3-25
well you are right, but then use this:
g=input('Input your function: ','s');
ft = fittype( g, 'independent', 'x', 'dependent', 'y' )
and then introduce your input function, a*x^2+b*exp(n*x), or whatever.
I use this way, what I saw on your code us that you introduced {g} as input argument, and that's why MATLAB says that you are introducing a cell because {} are used for cell variables. I hope it works this time. Regards
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
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
