Symbolic Toolbox: transforming a function y(x) to x(y)
18 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Hello everyone,
I have a function y(x) an need to find x(y) for x>=0.
y(x) is in the form: y(x) = a4*x^4 + a3*x^3 + a1*x
Where a4, a3, and a1 are real factors.
Is it possible to do this with Matlab's Symbolic Toolbox?
Thanks in advance, Marco R.
0 Commenti
Risposte (1)
Ghada Saleh
il 17 Lug 2015
Hi Marco,
You can inverse your function using functional inverse in Symbolic Math Toolbox. You can also add the constraint as an assumption on 'x'.
The following piece of code might be helpful:
>> syms x a1 a3 a4;
>> assume(x >= 0);
>> y = a4*x^4 + a3*x^3 + a1*x;
>> g = finverse(y, x)
Note that MATLAB will represent the output in terms of 'x' which should represent 'y' in your case. To illustrate, refer to the following example:
>> syms x
>> f(x) = 1/tan(x);
>> g = finverse(f)
g(x) = atan(1/x)
I hope this helps,
Ghada
0 Commenti
Vedere anche
Categorie
Scopri di più su Symbolic Math Toolbox in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!