6

How to use FactoQGIS for Typological Analysis Principal Components Analysis (PCA) for vector features in QGIS?

I have a shapefile of polygons as in the following image:

enter image description here

Both visually and as illustrated by the Rose Diagram (in the image below) using Line Histogram Tool QGIS plugin available from the following link: https://plugins.qgis.org/plugins/LineDirectionHistogram/, it can be deduced that the overall orientation of the polygons is around 30 degrees, confirmed by calculating the mean of angle of orientation of all polygons.

enter image description here

I am looking for a Mathematical Tool to validate the mean angle. I was advised to use the Principal Component Analysis (PCA) to find first eigenvector which gives the direction of the first principal direction.

I found FactoQGIS: a GUI tool based on an R script to perform Geometric Data Analysis in QGIS available from the following link: https://github.com/ESO-Rennes/FactoQGIS.

Below is the screenshot of FactoGIS Tool.

enter image description here

I have been trying the FactoQGIS Tool with different parameters, but could not generate results. Which parameters should I set?

The shapefile of the polygons is available from the following link: https://drive.google.com/drive/folders/1BKp5VbR1aMAzCObGprvqeL0WSMqpTX32?usp=sharing

1
  • it seems like FactorQGIS is one of the developing field in GIS so please someone add the tag FactoQGIS to tag list – Uditha Herath Jan 23 at 20:40
1

I am the developer of the FactoQGIS tool. FactoQGIS is not suited to address your issue. I recommend you instead to use the SDE plugin: https://plugins.qgis.org/plugins/SDEllipse/

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.