search for: t0n3

...'m a cancer researcher and I need to learn R to complete a few projects. I have an introductory background in Python. My questions at the moment are based on the following sample input file: *Sample_Input_File* characteristics_ch1.3 Stage: T1N0 Stage: T2N1 Stage: T0N0 Stage: T1N0 Stage: T0N3 "characteristics_ch1.3" is a column header in the input excel file. "T's" represent stage and "N's" represent degree of disease spreading. I want to create output that looks like this: *Sample_Output_File* T N 1 0 2 1 0 0 1 0 0 3 As...