Total newbie to R here, I realize this is a basic question but I've been trying to figure it out for a long time here. I have a data frame with 9 columns; 6 of which describe the specific sample, 3 of which are actual numerical data. I have three different independent variables going on here, which is "root.exclusion" "fertilization" and "species." I am trying to select the values of "P" from which fertilization=phosphorus, species = FERO, and root.exclusion=parasitism , so I can compare with another subset of values, in which, for example, fertilization = no phosphorus
I realize this is insanely simple, but I can't get those . Any help with the code to start off? I've attached a screenshot of my .csv file that I've imported into R