In the last post I introduced the plot(.) function.

That function is the simplest one for create graphs.

Let's learn something more about that function.

Try the commands:

-->x = rand(10, 1)

x =

0.2113249

0.7560439

0.0002211

0.3303271

0.6653811

0.6283918

0.8497452

0.6857310

0.8782165

0.0683740

-->plot(x);

The result is the following picture.

Look the indexes (x axis), it starts on 1 and finishes on 10, because we did not put the x axis in the plot(.).

An other case:

-->y = rand(10, 1)

y =

0.3076091

0.9329616

0.2146008

0.312642

0.3616361

0.2922267

0.5664249

0.4826472

0.3321719

0.5935095

-->x = [0 1 2 3 4 5 6 7 8 9]'

x =

0.

1.

2.

3.

4.

5.

6.

7.

8.

9.

-->plot(x, y);

Now, the x axis starts on 0 and finishes on 9, because I put the coordinates of x axis.

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