Error Importing Excel Data

Just yesterday I was able to import a table with 3 columns, one titled Time with datetime data, the second titled Steps with numeric data, and a third titled ActionType with Out of Work, Sleep, Work, Exercise, and Non-Wear. Now when I go to import it, it says the cells Time and Steps are not importable, but the rest of it is. I tried to get around this by importing just the values for Time and labeling the variable time and doing the same for steps, but when I call bar, I get an error:

S = Steps;
>> T = Time;
>> b = bar(S, T);
Error using bar (line 139)
Input arguments must be numeric, datetime, duration or categorical.

I have no clue what happened, I greatly appreciate any help!

Answer 1

[KSSV]

T = readtable(myfile) ; 
S = T.(2);
T = T.(1);
b = bar(S, T);

[Gillian Murray]

Thank you!