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rax
2012 Feb 29
1
The joys of Nabble: Re: Cannot use negative argument in function
...0^(-7)
>> fpt <- Alpha+Beta*Press+Gamma**Temp*^2
>> Xv <- (RH/100)*fpt*Psv/Press
>>
>> ?Zm <- 1-(Press/TT)*(aa[1]+aa[2]**Temp*+aa[3]**Temp*^2
>> ? ? ? ? ? ? ? ? ? ? ?+(bb[1]+bb[2]*Temp)*Xv+(cc[1]+cc[2]**Temp*)*Xv^2)
>> +(Press/TT)^2*(dd+ee*Xv^2)
>> Roaxs <- pp*Ma/(zz*R*tt)
>> Rov <- Xv*Press*M/(Zm*R*TT)
>> Roa <- (1-Xv)*Press*Ma/(Zm*R*TT)
>> n <- 1+(Roa/Roaxs)*raxs+(Rov/ro)*rvs
>> return(n)
>> }
>>
>>
>> Basically, this is just a function to calculate index of refraction in air.
>>...
2012 Feb 29
3
Cannot use negative argument in function
Hi,
today i wrote a function in R of the type:
index.refraction <- function(Temp,Press, RH, CO2)
When i try to plug a negative number in Temp, i got this type of error:
"
n <- index.refraction(Temp= -40,100,80,CO2)
Messages d'avis :
1: In Ops.ordered(left, right) : '-' is not meaningful for ordered factors
2: In Ops.factor(left, right) : - not meaningful for factors
3: