MATLAB: Using ‘OR’ operator with ‘case’ statement

Is it good programming practice to use 'OR' operator with 'case' statement. I want to associate multiple values of 'switch' statement with each 'case' statement like below.

switch value

case 1|2|3

execute this

case 4|5|6

execute this

end

Best Answer

This would be the proper way for using or:

switch value
case {1,2,3}
% execute this

case {4,5,6}
% execute this
end

Related Solutions

MATLAB: Question regarding a switch statement

Example

n=input('n=');
switch n
  case 'abc'
      out=1
  case 4
      out=2
  otherwise
      out=3
end

MATLAB: The problem of using ‘case’

Your first (inadvisable, numerically fragile, should-be-avoided) concept works for me:

for omega = 0.1:0.1:2;
	switch omega
	case 0.1
		disp('one')
	case 0.2
		disp('two')
	end
end

displays this in the command window:

one
two

Because of floating pont error in those numbers, this would be an extremely unreliable way to write code. Do NOT do this!

Your second method can be done quite easily, by simply thinking about the actual case value that you actually want switch to compare (hint: your case conditions are equal to true or false, but omega is not equal to true or false):

for omega = 0.1:0.1:2;
	switch true % this is the value for a valid CASE.
	case abs(omega-0.1)<0.01;
		disp('one')
	case abs(omega-0.2)<0.01;
		disp('two')
	end
end

displays this in the command window:

one
two

Best Answer

Related Solutions

MATLAB: Question regarding a switch statement

MATLAB: The problem of using ‘case’

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