PRACTICAL MATLAB® FOR ENGINEERS PRACTICAL MATLAB

Time Domain Representation of Continuous and Discrete Signals 57

in a (for-end) loop, to assemble an array of movie frames, spaced over time by its

looping index.

R.1.174 For example, the following MATLAB sequence can be used to assemble a movie,

based on the contents of the current fi gure window over n.

MATLAB Solution

for frame=1:n

M(frame) = getframe; % captures the current figure as a frame

of M

end

R.1.175 The MATLAB command movie(M) displays the recorded M array containing

all the frames of M, one frame after the other in sequential ascending order:

frame(1), frame(2), frame(3), ..., frame(n − 1), frame(n).

FIGURE 1.47

(See color insert following page 374.) First color derivative plot of the magic matrix of R.1.169.

gradient of magic (10)

1 2 3 4 5 6 7 8 9

10

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FIGURE 1.48

(See color insert following page 374.) Second color derivative plot of the magic matrix of R.1.169.

second derivative (deI2) of magic(10)

1 2 3 4 5 6 7 8 9

10

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