How to filter a 'tall' array using multiple conditions?

I'm trying to get some data out of 'tall' arrays, with multiple conditions. So for example if my 'tall' array has 5 columns, I want to filter the array with conditions on multiple columns. 'find' doesn't work...

[Edric Ellis]

Generally with tall arrays, logical indexing is the way to go. Can you post some code that you're trying to run that doesn't work with tall?

[Johannes Koch]

Thanks a lot for you comment !!! I didn't know about logical indexing... I managed now to extract the data I was looking for but it isn't pretty (and not very fast if I want to look up stuff often, I think). What I'm doing is: using logical indexing to get a tall array the same length as my tall table (from which I'm looking to extract the data), then adding this array to the table, then gathering the desired table columns with the condition that the logical value must be true. Do you perchance know a smarter way? Here are the lines I'm talking about:

% tt is my original tall table with all the data
% logtt is my logical tall array reflecting my conditions

tt=[tt,array2table(logtt,'variablenames',{'check'})];
result=gather(tt(tt.check,1:6))

[Adam Filion]

Do you need to return the 'check' value for some reason? It will always have the value of 'true'. If not it should be more efficient to return only the tall table itself without appending the logical index to it.

result = gather(tt(logtt,1:6));