When I import SVG files into Illustrator (saved from R), they get completely messed up. Random portions of the figure are missing. Any suggestions?
And "saved from R" means what? The statistics software? Reddit? Some other service/ program? Generated with the R programming language? You need to be much more specific. That aside it's usually not particular helpful to describe such issues, but rather to show screenshots or the files in question themselves/ the SVG code. Again, you need to provide much more info and explain rather than just saying that your file gets messed up.
SVG is not a native file format of Illustrator.
It may or may not work.
Is the SVG file valid as per the W3C Validation?
Thank you, I have sent my file to the Adobe tech support and they are looking to fix the issue in upcoming releases of Illustrator.
Try open instead of import.