Hi Walter and Mil, I'm using a Macbook Pro (10.14.6) with an old Excel (2011). I'm not sure what you mean about function? Sorry I litterally just use Matlab to import Excel data files and plot graphs. So I normally would simply go to "import data" and then use the apps. It was dead simple... until tonight.
I don't know what "readtable" is or where/how to execute it?
The file is the Daily Returns for the Dow Jones (1985-2019) - attached. Even previous files I've worked on before are now all greyed out when I try to select them for import.
The only thing that ws odd tonight was I saw a Matlab message I've never seen before that asked me to allow permission to read my photo files, which I denied without even thinking, and now that maybe this might be linked?