Now, how change the graph's color?

The plot(.) has a argument that's a string.

We can do:

- plot(x, y, color);
- plot(y, color);

The possible colors are:

- red ("r");
- green ("g");
- blue ("b");
- cyan ("c");
- magenta ("m");
- yellow ("y");
- black ("k");
- white ("w").

Let's do an example:

-->x = [-100:100]';

-->y1 = abs(x.^3)/1e+5;

-->y2 = x.^3 + x.^2 + 1;

-->y3 = tanh(0.01*x);

-->y2 = y2/max(y2);

-->plot(x, y1);

-->plot(x, y2, "r");

-->plot(x, y3, "g");

-->scf(); plot(x, y2, "k"); plot(x, y3, "y");

This example uses some functions that I had written about, so review the blog if you don't understand anything, or comment here.

The result is following.

Look that the default color is blue.