Probability distribution for a mean wind speed

Hello, I have a data of mean wind speed over defined area sampled for 10 last years. I would like to plot a Weibull distribution curve based on my data. How do I do this? I have tried wblplot(X)and it gives me a straight line, but the shape of a graph should be as smooth parabolic curve. Do I need more data to get Weibull distribution?

Answer 1

[dpb]

From doc wblplot--

"The purpose of a Weibull probability plot is to graphically assess whether the data in X could come from a Weibull distribution. If the data are Weibull the plot will be linear."

So, looks like you've answered the fundamental question.

To plot the actual empirical cdf or pdf, fit to estimate the parameters from your data and plot using them.

[Nobel Mondal]

Just to add on that - you might want to use "wblfit" to get the estimation of your scale and shape parameters. Create a random weibull dataset with the same values, and compare with your original dataset.

[Sergey Dukman]

Thank you, I am new in wind theory, so my question may be stupid.

Regards, Sergey