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I have a small project where I'd like to investigate the relationship between number of events (many thousand x-y points) in a city and the rent of each neighbourhood (around 50 x-y centroid points of neighbourhood polygons, each with a corresponding rent value).

I have these two data sets in two csvs (one with all the events and their lat/long, the other with all the neighbourhood centroids and their rent value).

I was hoping I would be able to click some kind of magic button in QGIS to do a geographically weighted regression (I already did a basic non-GW regression and plot in R and there was a nice relationship) in order to account for the proximity of the actual points for events/neighbourhoods... but I can't see an option anywhere in the menu for GWR.

Therefore,

1) Is there a way to do this easily in QGIS? Perhaps a plugin of some sort?

2) If not, do I have to use R and what is the plugin for this?

I've never done GWR before.

  • You can use R scripts in the Processing Toolbox – gene Feb 23 '17 at 16:44
  • Ah yes thanks - is there one you suggest for basic GWR? – the_t_test_1 Feb 23 '17 at 16:49
  • You need a solution in R first and after, create the script ( example in Integrating QGIS and R: A stratified sampling example and QGIS-Processing rscripts) – gene Feb 23 '17 at 17:56
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    As per the Tour there should be only one question asked per question do it sounds like you should focus this on R and if you get stuck on QGIS later then ask about that then in a separate question. – PolyGeo Feb 23 '17 at 20:07
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    Please note that your neighborhoods represent areas, which may vary considerably in size, and cannot be treated as a discrete point feature. This is statistically invalid because a point does not represent the polygon area and the inference derived from the model would thus be incorrect. – Jeffrey Evans Feb 23 '17 at 22:05
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Have you tried the standalone GWR4 app? It was developed by Fotheringham et al. It seems that it is missing a permanent home on the web right now, but I found this link: https://gwrtools.github.io/gwr4-downloads.html

Edit: The application is outside of QGIS and R but will accept CSV format as input. The outputs are a .txt file with summary information and a .csv file with local estimates for all of your points.

  • Welcome to GIS SE! As a new user please take the tour to learn about our focused Q&A format. Please edit your answer to include some information about what your suggestion does, and how to use it in order to answer the question. – Midavalo Feb 23 '17 at 21:34

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