## can any one know how to code for this equation

Asked by navi g

### navi g (view profile)

on 14 Feb 2017
Latest activity Edited by KSSV

### KSSV (view profile)

on 14 Feb 2017
i also tried to code for this equation but getting error , can anyone help me this is my program.
>t=0:0.01:10;
L=1.9;
x=(-L/2):0.0019:(L/2);
X=tand(2.42)*(L/2);
w=2*pi()*0.35;
W=2*pi()*0.42;
g=9.81;
n=0:0.1:100;
r=((((-1).^n).*4.*L.*(w.^2).*sin(((2.*n)+1).*pi().*x./L))./((pi().^2).*(((2.*n)+1).^2).*((W.^2)-(w.^2))));
y=sum(r);
N=(w.^2).*X.*sin(w.*t).*(x-y)/g;
..
i should get 1000 r values , i m getting only one know why is this problem

### Torsten (view profile)

on 14 Feb 2017
Edited by Torsten

### Torsten (view profile)

on 14 Feb 2017

1. n is integer. So n=0:0.1:100 doesn't make sense.
2. You can't evaluate r for arrays of n and x simultaneously. So loop over different x-values for n=0:100, e.g.
3. In this loop over the x-values, save y in a vector y(loopindex).
Best wishes
Torsten.

navi g

### navi g (view profile)

on 14 Feb 2017
thank u torsten, i tried but no results, do you know how to solve this summation equation .
Torsten

on 14 Feb 2017