power.output[wind.speed, air.density]
assuming power.output is your matrix, wind.speed a vector with speeds
and air.density another vector with air densities you want.
Petr
Met Man napsal(a):
> I have an array with dimension of 5001 (rows) by 40 (columns). This array is
> a series of power output from a wind turbine in kW. The rows correspond to
> wind speed from 0 to 50 m/s in 0.01 m/s step increments. The columns
> correspond to the air density values from 0.90 to 1.30 kg/m3 in 0.01 kg/m3
> step increments. I have a vector of wind speed and air density observations
> (typically 8760 records for a year). Given the wind speed and air density,
> I want to select the proper wind turbine power output. I've been trying to
> figure this out, but am having a major brain fart. I can do this in a for (
> i in 1 : N ) { } loop, but that is very, very inefficient. Can anyone
> suggest a simple, efficient way to do this in R? Thanks.
>
>
--
Petr Klasterecky
Dept. of Probability and Statistics
Charles University in Prague
Czech Republic
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