Your problem is MATLAB is like me. I can never figure out how to spell weibull. Is it i before e? And why does wblfit not have two L's in it?? I mean, I can't even figure out how to pronounce wblfit. So MATLAB gets confused. ;-)
Seriously, I'd first check to see if you can use other tools from the stats toolbox. normfit, or lognfit, for example?
I did check to see that wblfit was introduced long before R2012. So if you have a valid toolbox for your release, then it should be able to use wblfit.
wblfit(rand(100,1))
ans =
0.55071 1.4476
