[R-sig-Geo] missing values in gstat for R

[Jon Olav Skoien]

Hi Friederike,

For which variable do you have NAs? If soil moisture is sm, you are 
missing in the first line:
[!is.na(soildmD79.sp$smoist.20.06.2005),]

If that is not the problem, it would be helpful if you sent a 
reproducible example.

Cheers,
Jon

Friederike.Gerschlauer at agrar.uni-giessen.de wrote:
> Dear list,
>
> I am having problems with dealing with missing values in gstat 
> computing a semivariogram.
>
> I am using R 2.9.1, gstat 0.9-64 on Windows Vista.
>
> I get the following error message:
>
> g <- gstat(id = "sm", formula = smoist.20.06.2005 ~ 1, data = 
> soildmD79.sp)
> g <- gstat(g, id = "bd", formula = BD ~ 1, data = 
> soildmD79.sp[!is.na(soildmD79.sp$BD),])
> g <- gstat(g, id = "S", formula = S ~ 1, data = 
> soildmD79.sp[!is.na(soildmD79.sp$S),])
> g <- gstat(g, id = "U", formula = U ~ 1, data = 
> soildmD79.sp[!is.na(soildmD79.sp$U),])
> g <- gstat(g, id = "T", formula = T ~ 1, data = 
> soildmD79.sp[!is.na(soildmD79.sp$T),])
> g <- gstat(g, id = "GMD", formula = GMD ~ 1, data = 
> soildmD79.sp[!is.na(soildmD79.sp$GMD),])
> g <- gstat(g, id = "vcover", formula = vcover ~ 1, data = 
> soildmD79.sp[!is.na(soildmD79.sp$vcover),])
> g <- gstat(g, id = "mean_C", formula = mean_C~ 1, data = 
> soildmD79.sp[!is.na(soildmD79.sp$mean_C),])
> g <- gstat(g, id = "biomass", formula = biomass  ~ 1, data = 
> soildmD79.sp[!is.na(soildmD79.sp$biomass),])
> png(file = "sm_soilparamter_cross_20-06-2005.png", width = 1400, 
> height = 1000, bg = "white", res = 100)
> plot(variogram(g), main = "Cross variograms Soil moisture and stable 
> soil parameters", sub="20/06/2005")
>
> Error: dimensions do not match: locations 200 and data 96
>
> This message occurs due to 100 x,y coordinate pairs and 96 values for 
> the variable soil moisture.
> Even though the function contains already "data = 
> soildmD79.sp[!is.na(soildmD79.sp$BD),]" the missing values still cause 
> an error.
>
> Thanks for any suggestions or comments,
> Friederike
>
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