Can someone tell how I should code this equation for plot

x(t)=0.8cos(14t) this is my equation and i'm unable to plot this equation. It show me a error "Array indices must be positive integers or logical values."

Answer 1

[Star Strider]

That would work (with multiplication operators) in the Symbolic Math Toolbox —

syms t 
x(t)=0.8*cos(14*t)

x(t) = 

figure
fplot(x, [-2*pi 2*pi])
grid

It would need to be coded as an anonymous function to use it numerically —

x = @(t) 0.8*cos(14*t);

t = linspace(-2*pi, 2*pi, 500);

figure
plot(t, x(t))
grid

See the documentation section on Anonymous Functions for details.

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[raveen abeywardana]

Ahh okay I got it. Thank you for your help.

[Star Strider]

As always, my pleasure!

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