How to use regexp to extract data?

Hi I have this cell array, and want to extract character before and after the "__"

tdata = {'XX__TG','GB_TH','BN__TH'}';

I want to use regexp and return me

out1 = {'XX'; 'GB'; 'BN'};

out2 = {'TG'; 'TH'; 'TH'};

Thanks

Answer 1

[Stephen23]

>> tdata = {'XX__TG';'GB_TH';'BN__TH'};
>> spl = regexp(tdata,'_+','split');
>> spl = vertcat(spl{:});
>> out1 = spl(:,1)
out1 =
   'XX'
   'GB'
   'BN'
>> out2 = spl(:,2)
out2 =
   'TG'
   'TH'
   'TH'