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| Estimació Bayesiana de Densitat per Nucli× | Anàlisi de punts calents (Getis-Ord Gi*)× | |
|---|---|---|
| Camp | Anàlisi espacial | Anàlisi espacial |
| Família | Regression model | Regression model |
| Any d'origen≠ | 1995 | 1992 |
| Autor original≠ | Hjort & Glad (1995); extended by various authors in Bayesian nonparametrics | Arthur Getis and J. Keith Ord |
| Tipus≠ | Nonparametric density estimation | Local spatial statistic |
| Font seminal≠ | Hjort, N. L., & Glad, I. K. (1995). Nonparametric density estimation with a parametric start. The Annals of Statistics, 23(3), 882–904. DOI ↗ | Getis, A., & Ord, J. K. (1992). The analysis of spatial association by use of distance statistics. Geographical Analysis, 24(3), 189-206. DOI ↗ |
| Àlies | Bayesian KDE, BKDE, Bayesian nonparametric density estimation, Bayesian adaptive KDE | Getis-Ord Gi* statistic, spatial hot spot detection, cluster and outlier analysis, HSA |
| Relacionats | 5 | 5 |
| Resum≠ | Bayesian Kernel Density Estimation (BKDE) is a nonparametric method for estimating the probability density function of a spatial or attribute variable by combining a kernel smoother with a Bayesian prior over the bandwidth parameter. The posterior distribution of the bandwidth propagates uncertainty into the final density estimate rather than treating the bandwidth as a fixed tuning constant. | Hot Spot Analysis uses the Getis-Ord Gi* local spatial statistic to identify geographic locations where high or low attribute values cluster together to a degree that is statistically significant. Each feature is evaluated in relation to its neighbours, producing a z-score that flags genuine spatial hot spots and cold spots against a background of random variation. |
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