problem about the scipt
4 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Shi Yuhao
le 27 Avr 2014
Modifié(e) : Andrew Newell
le 5 Mai 2014
clear all
l = 25
E = 200*10^9
I = 350*10^-6
w = 6*10^3
x = input('enter length of the beam')
if (x>=0)&(x<= l/2),
y = -w*x/384*E*I *(16*x^3-24*l*x^2+9*l^3);
elseif
(x>=l/2)& (x<= l);
y = -w*x/384*E*I*(8*x^3-24*l*x^2+(17*l^2)*x-l^3)
end
Why I can not get the value of y? How to get it?
10 commentaires
Geoff Hayes
le 28 Avr 2014
What are you asked to loop over? There is no loop in your above code. As well, please verify your equation. Perhaps post it here and we can help make sure that you have coded it up (in MATLAB) correctly.
Réponse acceptée
Image Analyst
le 27 Avr 2014
y DOES get assigned. Verify by stepping through your code. If you don't know how to do that, see this: http://blogs.mathworks.com/videos/2012/07/03/debugging-in-matlab/ Also, the line that says
(x>=l/2)& (x<= l);
should probably have a % in front of it because it doesn't do anything and appears like it should be a comment.
5 commentaires
Image Analyst
le 28 Avr 2014
I'm really baffled as to how that can be true. Please start a new script and paste this code in there exactly . I mean exactly - nothing else but this code below:
clc; % Clear the command window.
clear; % Erase all existing variables. Or clearvars if you want.
workspace; % Make sure the workspace panel is showing.
format long g;
format compact;
fprintf('Starting code...\n');
l = 25
E = 200*10^9
I = 350*10^-6
w = 6*10^3
x = input('enter length of the beam : ')
if (x>=0) && (x<= l/2)
fprintf(' Now entering the "if" block of code to set the first y...\n');
y = -w*x/384*E*I *(16*x^3-24*l*x^2+9*l^3)
else
fprintf(' Now entering the "if" block of code to set the first y...\n');
y = -w*x/384*E*I*(8*x^3-24*l*x^2+(17*l^2)*x-l^3)
end
fprintf('Code has ended!\n');
Now, copy and paste what you see in your command window. When I type in 0.5, I see the following:
Starting code...
l =
25
E =
200000000000
I =
0.00035
w =
6000
enter length of the beam : 0.5
x =
0.5
Now entering the "if" block of code to set the first y...
y =
-76823359375000
Code has ended!
What do you see in your command window? Anything? What does "doesn't stop" mean? Does it doe it over and over again forever? Does it just do absolutely nothing at all with nothing in the command window whatsoever? What do you see?
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Characters and Strings 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!