This solution worked, could you explain how you put it together? What does it
mean to put a sign (x) * ?? Thank you
Héctor Lépez Cel: 154137337
El viernes, 9 de marzo de 2018 09:25:18 ART, Stéphane Mottelet
<[email protected]> escribió:
Le 09/03/2018 à 11:57, Hector R. Lepez a écrit :
I have problems to graph the function
x=[-10:1:10]
y = x^(1/3);
plot(x,y);
the same in plot of google gives a graph but scilab does anything with the
sign.
Héctor Lépez
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By default in scilab non-integer power elevation of negative number is made in
the complex domain. The particular case of the real cubic root can be treated
like this :
y = sign(x).*abs(x)^(1/3);
otherwise (-1)^(1/3) gives you one of the complex cubic root of -1, namely
exp(%i*%pi*1/3)
S.
--
Stéphane Mottelet
Ingénieur de recherche
EA 4297 Transformations Intégrées de la Matière Renouvelable
Département Génie des Procédés Industriels
Sorbonne Universités - Université de Technologie de Compiègne
CS 60319, 60203 Compiègne cedex
Tel : +33(0)344234688
http://www.utc.fr/~mottelet _______________________________________________
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