I am splitting the rows on a field called names, if some names are not available in a given time frame I want to add it and display NA across other columns. Please help.
Example table:
name country state
n1 c1 s1 --- available
n2 c2 s2 --- available
n3 NA NA ---- n3 not available
here n3 is not present, but I want to display it saying not available/present