Beginner question: Loops in Matlab

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Heartrin
Heartrin 2015-10-29
评论： Torsten 2015-10-29
Hi all,
I need to write matlab codes for the below formula.
theta = u+h1-h2-w
in this formula,
h1 = (theta+8)*gamma*23; h2 = 8/(theta+1)
so its a loop which i have to write. All u,w,h1,h2,gamma is an array
how and what loop should i use to write a code for this problem?
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Torsten
Torsten 2015-10-29
Why in a loop ? Do you want to calculate it iteratively ?
Best wishes
Torsten.
Heartrin
Heartrin 2015-10-29
yes, all the variables in the formula is an array. i have to do it iteratively only right? or can i do it without a loop?

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Torsten
Torsten 2015-10-29
Two solutions:
theta1=(1-(u-w)-9*23*gamma)./(2*(23*gamma-1))+sqrt(((1-(u-w)-9*23*gamma)./(2*(23*gamma-1))).^2-(-(u-w)-8*23*gamma+8)./(1-23*gamma))
theta2=(1-(u-w)-9*23*gamma)./(2*(23*gamma-1))-sqrt(((1-(u-w)-9*23*gamma)./(2*(23*gamma-1))).^2-(-(u-w)-8*23*gamma+8)./(1-23*gamma))
Best wishes
Torsten.
  2 个评论
Heartrin
Heartrin 2015-10-29
thanks.
what if the equation is,
theta_dot = u+h1-h2-w
h1 = (theta+8)*gamma*23; h2 = 8/(theta+1)
theta_dot i mean its a dtheta/dt. then i have to use loop right?
Torsten
Torsten 2015-10-29
I don't understand what you will try to do within a loop.
Use MATLAB's ode45 to solve your differential equations.
Best wishes
Torsten.

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