MATLAB Programming

Program Control Statements
while loop when the first empty line is encountered. The resulting character
array contains the M-file help for the fft program.
fid = fopen('fft.m', 'r');
s = '';
while ~feof(fid)
line = fgetl(fid);
if isempty(line)
break
end
s = strvcat(s, line);
end
disp(s)
Error Control — try, catch
Error control statements provide a way for you to take certain actions in the
event of an error. Use the try statement to test whether a certain command
in your code generates an error. If an error does occur within the try block,
MATLAB immediately jumps to the corresponding catch block. The catch
part of the statement needs to respond in some way to the error.
try and catch
The general form of a try-catch statement sequence is
try
statement
...
statement
catch
statement
...
statement
end
In this sequence, the statements between try and catch are executed until
an error occurs. The statements between catch and end are then executed.
Use lasterr to see the cause of the error. If an error occurs between catch
and end, MATLAB terminates execution unless another try-catch sequence
has been established.
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