MATLAB Graphics - A Guide to MATLAB for Beginners and Experienced Users - page 79

The lemniscate x 2 -y 2 =(x 2 +y 2 ) 2

1

0.8

0.6

0.4

0.2

0 ← a node, also an inflection

point for each branch

-0.2

-0.4

-0.6

-0.8

-1

-1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1

x

Figure5-9

'FontSize', 16, 'FontName', 'Helvetica',...
'FontWeight', 'bold')
>> text(0, 0, '\leftarrow a node, also an inflection')
>> text(0.2, -0.1, 'point for each branch')
>> xlabel('x'); ylabel('y')
The result is shown in Figure 5-9. Note that many symbols (an arrow pointing
to the left in this case) can be inserted into a text string by calling them
withnames starting with \ . (If you've used the scientific typesetting program
T E X, you'll recognize the convention here.) In most cases the names are self-
explanatory. For example, you get a Greek π by typing \ pi , a summation sign

by typing either \ Sigma (for a capital sigma) or \ sum , and arrows pointing
invariousdirectionswith \ leftarrow , \ uparrow ,andsoon.Formoredetails
and a complete list of available symbols, see the listing for “Text Properties”
in the Help Browser.
An alternative is to make use of the tool bar at the top of the figure window.
The button indicated by the letter “A” adds text to a figure, and the menu item