Thank you very much for helping me. just realised that I had accidentally typed in another word after propotion_wetland which then didn't allow me to find it. However I have now performed the next bit being this:
proportion_wetland_predict_combined <- cbind(df2, proportion_wetland_prediction)
proportion_wetland_predict_combined
but my lower and higher values seem wrong. eg. my lower/upper interval values should be as such: 2.791127e-06.
thank you very much for getting in touch much appreciated