This solution is outdated. To rescore this solution, sign in.
Which doors are open?
Sum of first n terms of a harmonic progression
Is it a number?
Mean ignoring NaNs
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