spdep

A collection of functions to create spatial weights matrix objects from polygon 'contiguities', from point patterns by distance and tessellations, for summarizing these objects, and for permitting their use in spatial data analysis, including regional aggregation by minimum spanning tree; a collection of tests for spatial 'autocorrelation', including global 'Morans I' and 'Gearys C' proposed by 'Cliff' and 'Ord' (1973, ISBN: 0850860369) and (1981, ISBN: 0850860814), 'Hubert/Mantel' general cross product statistic, Empirical Bayes estimates and 'Assunção/Reis' (1999) doi:10.1002/(SICI)1097-0258(19990830)18:16%3C2147::AID-SIM179%3E3.0.CO;2-I Index, 'Getis/Ord' G ('Getis' and 'Ord' 1992) doi:10.1111/j.1538-4632.1992.tb00261.x and multicoloured join count statistics, 'APLE' ('Li 'et al.' ) doi:10.1111/j.1538-4632.2007.00708.x, local 'Moran's I', 'Gearys C' ('Anselin' 1995) doi:10.1111/j.1538-4632.1995.tb00338.x and 'Getis/Ord' G ('Ord' and 'Getis' 1995) doi:10.1111/j.1538-4632.1995.tb00912.x, 'saddlepoint' approximations ('Tiefelsdorf' 2002) doi:10.1111/j.1538-4632.2002.tb01084.x and exact tests for global and local 'Moran's I' ('Bivand et al.' 2009) doi:10.1016/j.csda.2008.07.021 and 'LOSH' local indicators of spatial heteroscedasticity ('Ord' and 'Getis') doi:10.1007/s00168-011-0492-y. The implementation of most of these measures is described in 'Bivand' and 'Wong' (2018) doi:10.1007/s11749-018-0599-x, with further extensions in 'Bivand' (2022) doi:10.1111/gean.12319. 'Lagrange' multiplier tests for spatial dependence in linear models are provided ('Anselin et al'. 1996) doi:10.1016/0166-0462(95)02111-6, as are 'Rao' score tests for hypothesised spatial 'Durbin' models based on linear models ('Koley' and 'Bera' 2023) doi:10.1080/17421772.2023.2256810. A local indicators for categorical data (LICD) implementation based on 'Carrer et al.' (2021) doi:10.1016/j.jas.2020.105306 and 'Bivand et al.' (2017) doi:10.1016/j.spasta.2017.03.003 was added in 1.3-7. From 'spdep' and 'spatialreg' versions >= 1.2-1, the model fitting functions previously present in this package are defunct in 'spdep' and may be found in 'spatialreg'.

Last 30 days

This package has been downloaded 38,437 times in the last 30 days. The downloads are officially high enough to crash an underfunded departmental server. Quite an accomplishment! The following heatmap shows the distribution of downloads per day. Yesterday, it was downloaded 669 times.

The following line graph shows the downloads per day. You can hover over the graph to see the exact number of downloads per day.

Last 365 days

This package has been downloaded 441,485 times in the last 365 days. This is the kind of download count that makes grant committees nod approvingly. A job well done, even the stoic reviewers might be impressed! The day with the most downloads was Jul 03, 2024 with 2,670 downloads.

The following line graph shows the downloads per day. You can hover over the graph to see the exact number of downloads per day.