Please how can I unstack a column of negative and positive values into 2 columns of positive and negative values respectively?

sr=[-34;45;28;-10;-9]. s=sign(sr). I want to obtain sr1=[-34;-10;-9] and sr2=[45;28]

Answer 1

[dpb]

p=sr(sr>0);  % positive only
n=sr(sr<0);  % negative only, you'll have to decide where zero goes if it exists...

or,

ix=sr>0;  % logical vector
p=sr(ix);
n=sr(~ix);  % eliminate the test once at expense of temporary variable

[Nadousse28]

Thank you a lot. I will use the first solution.

Answer 2

[Jan Orwat]

You can compare your data with zero. This will classify your data and you can use it to get what you want.

Example based on your example data:

sr = [-34;45;28;-10;-9];
positive = (sr >= 0);
sr1 = sr(~positive);  % ~ in Matlab represents negation
sr2 = sr(positive);

[Nadousse28]

Thank you! Solution registered.