Plotting Maximum Height & Horizontal Distance

[roam]

I'm trying to solve the following problem using a MATLAB script but I keep getting an error:

Show on the same axes the maximum height and horizontal distance traveled for an object thrown at a speed of 10ms^-1 at an angle ranging from 0 to π/2. Equation for distance & height are:

D= v²/g sin(2θ)

h= (v²/2g) sin²θ

g=9.81.

This is my code:

g=9.81; v=10;
t=pi/2;
D=(v^2/g)*sin(2*t);
h=(v^2/(2*g))*(sin(t)).^2;
end
plot([0:t],D,'b',[0:t],y,'*')
legend('horizontal distance','maximum height')

When I run this code the graph doesn't come up and I get the following error:

? Error: File: Untitled.m Line: 5 Column: 1
Illegal use of reserved keyword "end".

Any help here is very much appreciated.

 

[trambolin]

There is an "end" but nothing is started e.g. "if, while" etc. Also you did not define variable "y"

g=9.81; v=10;
t=0:0.1:pi/2;
D=(v^2/g)*sin(2*t);
h=(v^2/(2*g))*(sin(t)).^2;
plot(t,D,'b',t,h,'*')
legend('horizontal distance','maximum height')

This should work...

 

[jishact]

Pls help me..
what are the preprocessing steps to be performed on a speech (wav file)signal in order to extract the fundamental frequency accurately?

 

[roam]

Thank you so much Trambolin, it worked!