Introduction

Scripts are great but always think about encapsulating code into functions. This is especially helpful when you create intermediate variables that you don't need in your script.

Task

Write a function to calculate given an array of time values, $.$ The function also has two scalar parameters, and $.$

I'll add one more constraint $-$ the output vector must be a column vector, with dimensions where is the length of the time array.

Skills

Array math using the $.*$ notation

Forcing an array to be a column

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

decayFn $=$ @$($t$,$a$,$w$)$ cos$($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$\text{'})$;