I am trying to do kriging in QGIS. I have loaded the SDA4PP plug in. Almost all of the items in the SDA4PP dropdown menu are not highlighted and are unresponsive when clicked on - including the kriging option.
SDA4PP appears to require an old version of R. R-2.11.0 worked for me for kriging. For Win:
After installing R and SDA4PP, in QGIS go SDA4PP -> Components/R Packages and select the R packages that the plug-in needs.
No guarantees I'm afraid. Nowadays I do my kriging with gvSIG/Sextante.