MATLAB by rudra pratap

• Errors
Errors are an integral part of life whether you interact with computers or not. The
only difference is, when you interact with computers, your errors are pointed out
immediately-often bluntly and without much advice. Interaction with MATLAB
is no exception. Yes, to err is human, but to forgive is definitely not MATLABine.
So, the earlier you get used to the blunt manners of your friend and his terse
comments, the better for you. As this friend does not offer much advice most of the
time, we give you some hints here based on our own experience in dealing with your
friend. Before we begin, we warn you that this friend has a tendency to become
very irritating if you work under too much time pressure or don't have enough sleep.
In particular, if you are not relaxed enough to distinguish between ( and [, ; and
: , or a and A, you and your friend are going to have long sessions staring at each
other.
Here are the most common error messages that you are likely to get while working
in MATLAB. All messages below are shown following a typical command. Following
the actual message are explanations and tips.
1 . »D = zeros (3) ; d = [1 2 ];
» D(2.:3, :) = s in ( d)
??? Subscrip ed. assi.gnment d.:IT.l..B.sio.n
This is a typical problem in matrix assignments where the dimensions of the
matrices on the two sides of the equal sign do not match. Use the size
command to check the dimensions on both sides and make sure they agree. For
example, for the preceding command to execute properly, size (D (2: 3, : ) )
and size (sin(d) ) or size(d) must give the same dimensions.