I got "The expression to the left of the equals sign is not a valid target for an assignment."
6 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello, when I run my code, i get error.
I can not see my fault. There is something wrong about i^2=-1 But I must use that expression.
Thank you.
clc
clear all
close all
fprintf('%10s %10s %10s %10s\n','k','real(xk)','imag(xk)','|f(xk)|')
k = 0 ;
i^2 = -1 ;
x = -2-2i;
f = @(x) x^3 - x - 3 ;
while abs(f(x)) > 10^(-5)
f = @(x) x^3 - x - 3 ;
diff = @(x) 3*(x^2) - 1 ;
xreal = real(x);
ximag = imag(x);
xnew = x - (f(x) / diff(x));
fprintf('%10.4f %10.4f %10.4f %10.4f\n',k,xreal,ximag,f(x))
x = xnew;
k = k +1;
end
2 commentaires
Réponse acceptée
Steven Lord
le 16 Avr 2019
Just eliminate that line from your code. The way you've defined x on the next line will make it complex since i is already defined to be the imaginary unit.
Plus de réponses (1)
Kelly Kearney
le 16 Avr 2019
As others have pointed out, i is already assigned the value you want by default.
But assuming it weren't, the proper way to assign the value would be:
i = sqrt(-1);
The error is basically telling you that Matlab won't implictly do any algebra for you... you can only assign a value to a variable, not to a function or equation like you attempted to do.
Voir également
Catégories
En savoir plus sur Logical dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!