extract numbers from a cell array

2011 4 11
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Hi I have a 1x19399 cell array all in the format of:
'Tick("TSP1",4285,1,{"52":"20101101005933863","TIME":"1288573173.867"})'
'Tick("TSP1",4287,1,{"52":"20101101005933869","TIME":"1288573173.869"})'
...... (19399 OF THEM)
I WANT TO TAKE THE NUMBERS AFTER THE TSP1 AND CREATE A NEW 1X19399 ARRAY OF NUMBERS CONTAINING 4285, 4287 ETC.... JUST THE 4 DIGIT NUMBER AFTER TSP1. ALL ARE IN THE SAME FORMAT.
thanks

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Matt Fig
Matt Fig 2011-4-11

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N = cellfun(@(x) str2double(x(13:16)),G) % G is your cell array.

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