MATLAB Answers

matrix creation from a loop

1 view (last 30 days)
Jonathan Demmer
Jonathan Demmer on 17 Sep 2020
Edited: Ruger28 on 17 Sep 2020
Hello all,
I would like to create 60 vector columns of zeros (6964,1) called lat_01_days, lat_02days, lat_03_days until 60. I know I could write them one by one but if i know How to create a loop to create them it would be better also for future research. Can someone help mep lease?
regards
Jonathan
  2 Comments
Jonathan Demmer
Jonathan Demmer on 17 Sep 2020
Thank you very much.

Sign in to comment.

Answers (3)

Walter Roberson
Walter Roberson on 17 Sep 2020
if i know How to create a loop to create them it would be better also for future research.
Our long experience is that it would make your future research worse instead of better.

Stephen Cobeldick
Stephen Cobeldick on 17 Sep 2020
The simplest and most efficient solution is to just create one matrix:
lat = zeros(6964,60)
which you can then trivially access using indexing. There is no point in making it more complex than that.

Ruger28
Ruger28 on 17 Sep 2020
Edited: Ruger28 on 17 Sep 2020
The two other answers are a more correct way of doing it. There is no need to create this many variables in your workspace. However, if you must...
You should use a structure instead of individual variables.
Blank_Vec = zeros(6964,1);
Num_Cols = 60;
for ii = 1:Num_Cols
name = sprintf('lat_%i_days',ii);
ZeroColStruct.(name) = Blank_Vec;
end
if you absolutely MUST have individual variables, one method is this:
% Removed due to being a terrible way to do something
  3 Comments
Jonathan Demmer
Jonathan Demmer on 17 Sep 2020
Thank you Stephen for your advice.

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by