You haven't showed us the text of the error, but I'm guessing it was:
Error using seconds (line 19)
Input data must be a real, numeric array.
Using parentheses to index into a table array (like Timeline) returns a smaller table.
Using curly braces to index into a table array returns the contents of those elements of the table.
Using dot to retrieve a variable from a table array returns the contents of that variable.
t = table(123)
s1 = seconds(t(1, 1)) % Throws an error
s2 = seconds(t{1, 1}) % Works
s3 = seconds(t.Var1) % Also works
If that's not the text of the error, please show the full and exact text of the error (all the text displayed in red in the Command Window.)
