All Questions
5 questions
0
votes
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answers
52
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Clip a SpatialGrid using a SpatialPolygon
In order to perform kriging methods using automap::autoKrige I need to provide a SpatialGrid for which values can be predicted. I would like to reduce the rectangular grid to the actual area (in this ...
- 115
0
votes
1
answer
572
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Ordinary Kriging: "Warning message: In fit.variogram(data.var, vgm("Mat")) : No convergence after 200 iterations: try different initial values?"
I am trying to fit a variogram for kriging using the sp and gstat packages in r, but when I fit the variogram using a mattern fit, I get this warning message:
Warning message:
In fit.variogram(data....
- 101
0
votes
1
answer
185
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Error message with Krige function: Error in as.character.default(X[[i]], ...) : no method for coercing this S4 class to a vector
I am trying to run the Krige function but I keep receiving NA values for var1.pred and var1.var. After using the warning() command, it says: Error in as.character.default(X[[i]], ...) :
no method for ...
- 1
0
votes
1
answer
2k
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After I give kring command, this error comes up: data item in gstat object and newdata have different coordinate reference systems
> library(gstat)
> library(readxl)
> library(sp)
> library(rgdal)
#2013(FATALITIES)
data <- read.csv("C:/Users/sbs/Desktop/Study/RA/Accident analysis/New folder/Iowa total crashes ...
9
votes
1
answer
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Kriging example with sf object
I am new to geo spacial analysis. I would like to learn kriging from a simple example. Say, we have four points with some z value.
library(sf)
library(gstat)
library(tidyverse)
dt<-tibble::...
- 261