I'll assume that your table looks like this:
>> t = table({'No'; 10; 20}, {'No'; 10; 60}, {'No'; 'No'; 'No'}, 'VariableNames',{'Position' 'Velocity' 'Acceleration'})
t =
Position Velocity Acceleration
________ ________ ____________
'No' 'No' 'No'
[10] [10] 'No'
[20] [60] 'No'
(which is not at all clear). How would you do this with any MATLAB array? The answer is essentially the same: loop over the variables in the table, deleting the ones that are all No's, and loop backwards so you're not deleting things out from under yourself. "dot-parens-index" dubscripting makes this almost identical to what you'd do for a double array.
for j = width(t):-1:1
if all(strcmp(t.(j),'No'))
t.(j) = [];
end
end
Another way is to use varfun to figure out what to delete, and then delete all at once.
toDeleteFun = @(x) all(strcmp(x,'No'));
toDelete = varfun(toDeleteFun,t,'OutputFormat','uniform')
t(:,toDelete) = [];
The terminology for tables is "variables", not "fields" or "columns".
