QGIS Regression Tools using only feature data

I’m trying to find in QGIS an analogous tool to ArcGIS’s "Ordinary Least Squares". The tool takes in a shapefile, where the dependent variable and independent variables are all fields in the same shapefile. The tool runs OLS and returns a shapefile with the same features as the original, with fields for fitted values and residuals. The SAGA tools in QGIS are not very intuitive nor well-documented, but from what I can decipher none of them seems to work like the "Ordinary Least Squares" tool in ArcGIS. To be clear, I want to run a regression where none of the data is in grid/raster format.