The problem title and description were cleaned up.
Which values occur exactly three times?
So many choices
Back to basics 23 - Triangular matrix
Is the input divisible by 3?
multiply by three
Find the treasures in MATLAB Central and discover how the community can help you!
Select a Web
Choose a web site to get translated content where available and see local events and
offers. Based on
your location, we recommend that you select: .
You can also select a web site from the following list:
Select the China site (in Chinese or English) for best site performance. Other MathWorks country
sites are not optimized for visits from your location.
Contact your local office