Function names cannot begin with a number. Also, this is an extremely simple problem that has been posted many times. Please put more thought into problems before posting them.
I changed the problem slightly and added some more test cases.
First non-zero element in each column
Change the sign of even index entries of the reversed vector
Find my daddy long leg (No 's')
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