Beginner question: Loops in Matlab

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?

[Torsten]

So you want to solve for theta from the equation

theta=u-w+(theta+8)*gamma*23-8/(theta+1)

?

Best wishes

Torsten.

[Heartrin]

yes i need to calculate theta.

how do i write it in loop?

[Torsten]

Why in a loop ? Do you want to calculate it iteratively ?

Best wishes

Torsten.

[Heartrin]

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?

Answer 1

[Torsten]

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.

[Heartrin]

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]

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.