Had some issues with factor plotting in ggPD_boot, plus y axis scale not responding to common.scale. 'Fixed' version attached

[dtickler-MF]

Hi there,

Had some issues plotting predictor-response plots with ggPD_boot in dismo. Appeared to be a problem whereby the code overwrote the plots created under is.factor == TRUE with the following lines for type.ci == "lines" or type.ci == "ribbon". Added an "else" between the two segments to avoid that. Also added na.rm = TRUE to the mean(), min() and max() commands that set the y axis limits when common.scales == T, as I was getting NAs. The issues may have been unique to my model (source file supplied as "model_outputs.R" in the zipfile in case you want to recreate the issues with the existing code) or I did something else stupid in setting up the model to plot, but the attached modified version of ggPD_boot (ggPD_boot_daveT) seems to work as expected. Would welcome any feedback!
ggPD_boot_daveT.zip