TABLE OF CONTENTS Our approach in this book has been to present material of interest to the majority of MATLAB users, omitting topics of more specialized interest. In this chapter we relax this philosophy and describe some tricks and tips that, while of limited use, can be invaluable when they are needed and are of general interest as examples of more advanced MATLAB matters.
The empty matrix [], mentioned in several places in this book, has dimension 0-by-0. MATLAB allows multidimensional arrays with one or more dimensions equal to zero. These are created by operations such as
<span class="unicode">?</span> 1:0 ans = Empty matrix: 1-by-0 <span class="unicode">?</span> zeros (2,0) ans = Empty matrix: 2-by-0 <span class="unicode">?</span> ones (1,0,3) ans = Empty array: 1-by-0-by-3
Operations on empty arrays are defined by extrapolating the rules for normal arrays to the case of a zero dimension. Consider the following example:
<span class="unicode">?</span> k = 5; A = ones(2,k); B = ones(k,3); A*B ans = 5 5 5 5 5 5 <span class="unicode">?</span> k = 0; A = ones(2,k); B = ones(k,3); A*B ans =...
