Check whether the input matrix is a figurate number triangle: http://mathworld.wolfram.com/FigurateNumberTriangle.html
you should probably add a test case where the correct answer is false.
I added a few more tests as suggested.
Replace NaNs with the number that appears to its left in the row.
Reverse the vector
Project Euler: Problem 10, Sum of Primes
Matrix with different incremental runs
Tune your guitar
Is my wife right? Now with even more wrong husband
Right and wrong
Cull vector elements that contain a specified digit
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