Introduction

Many MATLAB functions, e$.$g$.$ fmincon, require that you pass to them your own functions. This can be done in many different ways, including using anonymous functions. Here's a link that gives an introduction to this rather vast topic.

Task

Create a script that evaluates

for an array of time points, $,$ given the parameters and $.$ To do this, use an anonymous function named decayFn.

Skill

Anonymous function syntax and use

$\%$ Define the anonymous function. You need to fix the line below.

decayFn $=$ @$($t$,$a$,$w$)$ a$.*$cos$($w$.*$t$)$;

$\%$ Make a plot for some range of t and parameters a and w

t $=0$:$\mathrm{.}01$:$5$; $\%$ time $($s$)$

y $=$ decayFn$($t$,-2,2*$pi$)$; $\%$ output

plot$($t$,$y$)$;grid;xlabel$(\text{'}$Time $($s$)\text{'})$;ylabel$(\text{'}$y$\text{'})$;