Getting x value for a given y value from a fitted model
4 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi,
I have my code:
curve = @(a, b, c, d, e, x) a./(b+exp(-c*(x-d)))+e;
lower_bound = [-Inf -Inf -Inf 0, 0];
upper_bound = [Inf Inf Inf max(x), max(y)];
starting_param = [max(y) 1 1 x(round(length(x)/2)), min(y)];
sigm=fit(x, y, curve, 'StartPoint', starting_param, 'Lower', lower_bound, 'Upper', upper_bound) ;
I'm getting my fit result in the sigm which is cfit type.
My question is: how to obtain x value from a given y value out of sigm? If I write ans=sigm(0.5) I'm getting y value for a x=0.5 What I want is to get x value for y=0.5. How to code it?
thanks for help!
1 Kommentar
Akzeptierte Antwort
dpb
am 17 Jul. 2013
A) Evaluate the function over a range of x and then use interp1 to interpolate over the response to find a given x that gives a desired value.
B) Use fsolve() Recast the function to form f(x)-y = 0 where y is your target value.
0 Kommentare
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Multicore Processor Targets finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!