Effacer les filtres
Effacer les filtres

Why does matlab give me the wrong answer?

2 vues (au cours des 30 derniers jours)
Linus Heierhoff
Linus Heierhoff le 14 Sep 2019
Commenté : Rik le 20 Sep 2019
why?
  2 commentaires
Rik
Rik le 14 Sep 2019
3-2 is 1, which is greater than 0. How is this result wrong?
Linus Heierhoff
Linus Heierhoff le 14 Sep 2019
I would think that i would get something like this as a answer.
ans > 2

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Réponses (1)

Priyanshu Mishra
Priyanshu Mishra le 18 Sep 2019
Although this answer is not wrong, but for getting conditions on the solution, set ‘ReturnConditions’ to true. It will return any parameter in the solution and conditions on the solution. You can try following code:
clear all; close all; clc;
syms x;
eqn = x-2 >= 0;
assume (eqn)
S= solve (eqn,x,'ReturnConditions',true)
S.conditions
  5 commentaires
Priyanshu Mishra
Priyanshu Mishra le 20 Sep 2019
Hi Rik, I kind of agree with you. It completely depends upon the user whether he wants to close all the windows or not. I have written this code from the scratch and I just used those commands for my convenience. The user can start from line 2 .
Rik
Rik le 20 Sep 2019
My problem is that many inexperienced users always see those together and don't understand what they do, but assume they are all required to set up a working script. I have no problem with people using them (I use them myself regularly), but I do think we should be selective in what we put in our answers, because like it or not, we are teaching people best practices every time we post an answer.

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