MATLAB Answers

Switch -- How to specify interval of cases?

285 views (last 30 days)
Martin
Martin on 5 Apr 2012
Commented: Walter Roberson on 25 Jun 2018
Hi, I am writing a SWITCH statement, but I need each case to be chosen for an interval of the switch variable. I'd think this should be obvious, but I'm a bit lost. I know I can specify multiple values in the '{}', but I have too many to specify one by one. How can I incorporate something like case '1:100' ?
Here's an example of what I am trying to accomplish
switch i
case 1:100
statement
case 101:200
statement
end
I tried with {[1:100]} and various variations, but to no avail. I suppose I can create an if statement assigning a 'j' variable to 1 if 1<=i<=100 and then switch over j (so it would be case 1 and case 2), but that seems a bit too inefficient!
Any help?
thank you!

  0 Comments

Sign in to comment.

Accepted Answer

G A
G A on 5 Apr 2012
switch i
case num2cell(1:100)
statement
case num2cell(101:200)
statement
end

More Answers (2)

Martin
Martin on 5 Apr 2012
..ok, in fact I can do what I need with if:
if (i>=1)&&(i<=100)
statement
elseif (i>=101)&&(i<=200)
statement
end
Is there no way of doing this with SWITCH?

  0 Comments

Sign in to comment.


Mark Brandon
Mark Brandon on 25 Jun 2018
Edited: Mark Brandon on 25 Jun 2018
Much cleaner solution is to set switch to true. I use this approach all the time given that the "switch" construction is easier to read than the "if then else" construction.
For the example here:
switch true
case any(i==1:100)
statement
case any(i==101:200)
statement
end

  1 Comment

Walter Roberson
Walter Roberson on 25 Jun 2018
Variants that can be more efficient:
switch true
case ismember(i, 1:100)
statement
case i>=101 && i<=200
statement
end

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by