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Topic: Help on engineering homework
Replies: 9   Last Post: Dec 11, 2010 9:34 PM

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Ethan Robinson

Posts: 5
Registered: 12/10/10
Re: Help on engineering homework
Posted: Dec 11, 2010 9:16 PM
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"Rick Rosson" <rrosson@mathworks.com> wrote in message <idu3k9$1l4$1@fred.mathworks.com>...
> I agree with the general approach suggested by "ImageAnalyst", but I would
> recommend one improvement: you will probably need to use a time increment
> that is small than 1 (assuming that the unit of measure for time is
> 'seconds'). I would try something like this:
>
> startTime = 0; % seconds
> stopTime = 20; % or whatever makes sense
> dt = 0.01; % try different values here, not sure what
> makes sense
>
> t = startTime:dt:StopTime; % seconds
>
> Then compute h(t) and v(t) using the dot operators as suggested.
>
> h = ...
> v = ...
>
> Then plot both h and v versus t on two separate axes.
>
> Then use relational operators to find solutions to the questions asked.
>
> HTH.
>
> Rick
>
>
>
> "ImageAnalyst" <imageanalyst@mailinator.com> wrote in message
> news:741ed7c9-7c4a-49e4-a7e4-55389898daa1@v12g2000vbx.googlegroups.com...

> > Make t a vector, like t = 1:100, then in your formulas use dot slash
> > (./), dot star (.*), and dot caret (.^) instead. Get your h and v.
> > Then use the plot function to plot them.
> >
> > Relational and logical operators are described in the help. Look up
> > logical indexing also - you'll need that here, and to get anywhere in
> > MATLAB in the future.


Ah, that make sense, thank you so much.
Thank you everyone for the help, I really appreciate it!
-Ethan



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