# MATLAB: Help with ordering tables

MATLABmatrix

dear colleages… i have a problem with a table… here is the problem….
i got a table named depth:
 depth(:,1)=a1;  depth(:,2)=g1; i need to create two new tables (submarine and aerea) each one composed by selected values of the table depth and also composed by two columns each one:
for submarine: i need all negative values of the second column of depth (depth(:,2), with each corresponding value of the first colum of depth (depth(:,1).
for aerea: the same but positve values…
i prepare this but dosent work
 submarine=find((depth(:,2)<0,:)); aerea=find((depth(:,2)>0,:));
i think, find is not correct to be used in this case…. but what can i use?
thanx

#### Best Answer

• submarine = depth(depth(:,2)<0, :);aerea = depth(depth:,2)>0, :);
Question: what if the depth was exactly 0 ?