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Questions tagged [spdep]

An R package to provide functions for spatial regression, dependence, and weighting analysis.

62 questions
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Does mat2listw function in R return a row-standardized spatial weight matrix?

In the discussion in the accepted answer in this question, user3050574 said that: "... it is my understanding that mat2listw creates a row standardized weight matrix from a matrix that is currently just in binary form." This is the only place that…
Teng Huang
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Weighting observations in a spdep::lagsarlm Model?

I would like to estimate a spdep::lagsarlm Model (Spatially Autoregressive Regression) in R. My observations (n=447) are polygons, each representing an administrative region of Berlin. However, the problem is that the regions have a highly varying…
chamaoskurumi
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spdep "Not yet able to subset general weights lists" listw

I have a problems with spdep(). Starting with a matrix of non-missing distances produced by a function dist_m <- geoDistMatrix(data1, group = 'fips_dist') dist_m[upper.tri(dist_m)] <- t(dist_m)[upper.tri(dist_m)] we then turn into weights with…
JLM
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manually fixing colors in the map

The data is: d.fit.spatial.1914 <- structure(list(country = c("Albania", "Austria", "Belgium", "Netherlands", "Poland", "Portugal", "Denmark", "Germany", "Greece", "Spain", "Bulgaria", "Switzerland",…
Rustam
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no 'nobs' method available: Using the MuMIn package with simultaneous autoregression models

I'm hoping someone can help me figure out why the MuMIn package is not working with my simultaneous autoregression models. I have double checked the documentation for the package and it lists sarlm as one of the supported model types. However, when…
Kristin
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Robust Standard Errors in spatial error models

I am fitting a Spatial Error Model using the errorsarlm() function in the spdep library. The Breusch-Pagan test for spatial models, calculated using the bptest.sarlm() function, suggest the presence of heteroskedasticity. A natural next step would…
Orlando Sabogal
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Converting a normal list into a nb/spdep object in R?

I need to create a neighbours list from a spatial polygon. At the moment i am using the function poly2nb, but unfortunately it is not very accurate, and some polygons with no common points are considered neighbours. I have tried changing the snap…
mrc
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Include ID in an spatial weight matrix R

I have a data frame like this one: dataSp <- read.table( text = ' ID LATITUDE LONGITUDE A -85 134 B 34 2 C 42 3 D 45 5 E -2 80 F -5 …
Lilia
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Creating a giant matrix for use in CARBayes without running out of memory

I am trying to do an areal unit analysis using the package CARBayes. As part of the analysis, I am using the below code. my issue comes when I try to create the neighbour matrix with nb2mat. My sp object has 170,000 odd polygons in it so it can't…
hclutter
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How to estimate SAR spatial model without row-normalizing the matrix?

I am trying to estimate a SAR spatial model without row-normalizing the matrix. For some reason, when I do not row-normalize, the command does not return the correct estimates. Am I missing something on the command options? Here is an example of…
Miranda
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How to estimate spatial SAR model with islands?

I am trying to estimate a spatial SAR model using the lagsarlm command and I get the following error: Error in lagsarlm(f1, data = df, spatialList, tol.solve = 1e-30) : NAs in lagged dependent variable In addition: Warning message: …
Miranda
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Plotting graphs from class `nb` - How to change points color?

It is easier to explain what am I trying to do through the following reproducible example: library(sf) library(brazilmaps) library(spdep) # loading cities map cities_mg <- brazilmaps::get_brmap(geo = 'City', …
lcgodoy
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Compute distance based Local Moran for 527k+ point dataset using spdep library

As the title says, I'm trying to compute Local Moran for a 527k point dataset using the spdep package, creating neighborhoods based on distance. The generalized process I'm doing is the following: library(spdep) # Convert coordinates to…
Arodas
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Problems updating packages igraph and spdep

I´m trying to install the package NormqPCR and I have to update two packages, igraph and spdep, but until now I couldn´t and I can´t figure out what I must supouse to do. This is the code. if (!requireNamespace("BiocManager", quietly = TRUE)) + …
Gerardo Irigoyen
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How to optimize finding trace of a square matrix multiplication?

I'm trying to optimize spdep function of R for my use case since it is very slow for large databases. I was doing mostly fine but I stuck at one point, where I am trying to find trace of my weights matrix for LM error test. I think the formula is…
orcmor
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