Page 31 - Basics of MATLAB and Beyond

Companion M-Files Feature 2 To label many curves on a
plot it is better to put the text close to the curves themselves rather
than in a separate legend off to one side. Legends force the eye
to make many jumps between the plot and the legend to sort out
which line is which. Although matlab comes equipped with a
legend function, I prefer to use the companion m-file curlabel,
which is good especially for labelling plots which are close together:

t = 0:.1:2*pi;
plot(t,sin(t),t,sin(1.05*t))
curlabel(’frequency = 1’)
curlabel(’frequency = 1.05’)
axis([0 max(t) -1 1])
zeroaxes

You must use the mouse to specify the start and end points of the
pointer lines. The echo from the function can be pasted into an
m-file for future use.

5 More Matrix Algebra

You can multiply two matrices together using the * operator:

>>a=[12;3 4]
a =
1 2
3 4
>>b=[1010;0110]
b =
1 0 1 0
0 1 1 0
>> a*b
ans =
1 2 3 0
3 4 7 0

>>u=[1201]
u =
1 2 0 1
>>v=[1122]’

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