MATLAB can plot waveforms given two declared vectors$/$matrices$.$ In the context of AC

analysis we can declare a vector $$t$$ for time and relate it to a cosine function then plot the

transient response on a figure.

$\%$ Creating Graphics

t $=0$:$0\mathrm{.}1$:$20$;

Vin $=10*$cos$($t$)$;

figure;

plot$($t$,$ Vin$)$;

$$t$$ is declared with a special syntax that creates a long row of numbers from $0$ to $20$ with $0\mathrm{.}1$

intervals. It$$s a quick way to declare a time range and in the simplest sense is how you create the

x axis for your plot. This example has a range from $0$ to $20$ seconds for a cosine wave with

period of $2\backslash$pi $.$

Figure $4$ Example MATLAB Cosine Plot