Multiplying multiple variables within an equation
8 views (last 30 days)
Show older comments
Hi,
Really simple question, but with not using Matlab for the last 2 years I've forgotten and I can't find the answer anywhere.
I'm trying to solve an equation of motion, with a varying initial velocity and angle theta.
I want the velocity (u) to vary between 0 and 10ms^-1 in 0.5 increments so typed in: u=0:0.5:10. I then did the same for theta between 0 and 90 degrees theta=0:1:90
The equation is:
y= ((u^2)*(sin^2(theta))/(9.81*2)
What I was expecting was 91 values for y for every value of u, however I keep getting a error message "mtimes: inner matrix dimensions must agree"
Can anyone tell me where I've gone wrong?
Thanks for your help.
0 Comments
Accepted Answer
David Young
on 21 Nov 2011
y = (u.').^2 * sin(theta).^2/(9.81*2);
gives you 21 x 91 matrix, where each row corresponds to one of the u values, and each column corresponds to one of the theta values.
3 Comments
More Answers (0)
See Also
Categories
Find more on Logical in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!