MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn moreOpportunities for recent engineering grads.

Apply TodayTo resolve issues starting MATLAB on Mac OS X 10.10 (Yosemite) visit: http://www.mathworks.com/matlabcentral/answers/159016

Asked by mohamed on 26 Feb 2013

>> n=2; >>t=520 >> r=5; >> p=1000; >> x=n*r*t/p; a=1; , b=2; >> y=n*r*t/(p+a*n^2/x^2))+n*b; while abs(x-y)<= 0.001 x=y; y=n*r*t/((p+a*n^2/x^2))+n*b; end

*No products are associated with this question.*

Answer by Walter Roberson on 26 Feb 2013

Accepted answer

I suspect you will find that your while loop body is not executing at all.

Show 4 older comments

mohamed on 27 Feb 2013

yes , i run the code in my mind and i want it to continue until the condition is satisfied (difference<=0.001)

Image Analyst on 28 Feb 2013

It's not even satisfied the very first time! Like Walter tried to tell you, the first time it hits that line, x = 5.2, and y = 9.1992, so abs(x-y) = 3.992 and since this is *not less than* 0.001, **your loop never even gets entered the very first time**. If you learn how to use the debugger, or simply leave off semicolons, you will discover these kinds of things very very easily and quickly.

## 0 Comments