Deleting columns corresponding to time value

If I have a time axis of

t=[0:1:4]; %time step 1

that corresponds to x,y,z data as an array where the first row is x second is y third is z say

data=[1,2,3,4,5;1,4,5,6,7;2,3,8,4,5]; %5 columns 

how would I discard values for if t<3 It deletes all the columns corresponding to the time, so it gets rid of the 1st 2nd and 3rd column to get and produces

data=[4,5;6,7;4,5];

Answer 1

[JESUS DAVID ARIZA ROYETH]

solution:

data(:,t<3)=[];
disp(data)

[pavan kumar]

thank u sir

Answer 2

[David Hill]

data=data(:,data(1,:)>3);