Tuesday, July 17, 2007

Longshot

Anyone know anything about using Matlab to generate a probability density function with a Weibull distribution?

Because I sure as heck don't.

And I need to figure it out before my long (all day!) humiliating meeting with Dr. Advisor, which is tomorrow.

Next stop Starbucks.

Update: I think what I need help with is "fitting a Weibull distribution" to some data I already have. Thanks so much to the two nice people who have already left comments!

5 comments:

Will Dwinnell said...

I have two questions:

1. Do you need to generate the actual Weibull PDF, or random deviates drawn from a Weibull distribution?

2. Do you have the Statistics Toolbox?


-Will
Data Mining in MATLAB

Eric said...

If you just need the PDF, you can code up the formula given at Wolfram's Mathworld.

Kyla said...

Uhhh, I'm confused...but I do know Starbucks is always the answer. ;)

Sarah said...

wow-- you sound super smart. also? do you have dunkin donuts by you? because their coffee is super, and i think i may drop out of grad school and franchise a dd where i live-- we don't have one, and i think it is a bajillion dollar idea in my town.

Will Dwinnell said...

There is a pdf() function in the Statistics Toolbox, so I will assume that you have it. (You can check what toolboxes are installed by typing 'ver' at the MATLAB command line.)

The pdf() function returns PDF values for a specified distribution and parameters. The Statistics Toolbox includes a series of probability distribution-fitting routines. The one for Weibull is wblfit().

Let me know if this does not help.


-Will
Data Mining in MATLAB