# make vectors same length

11 views (last 30 days)
Adam Levschuk on 6 Aug 2020
Commented: Matt J on 7 Aug 2020
Hello,
I input my data as three different variables, acc, gyr, and mag. I want a small amount of code that makes all three variables the length of the shortest variable.
For example, if acc is 12000x1 and gyr is 12000x1, but mag is 12001x1, how can i automate deleting this row to make the vectors all the same length.

Matt J on 6 Aug 2020
Edited: Matt J on 6 Aug 2020
One way,
collection = {acc,gyr,mag};
minlen = min(cellfun('length',collection));
clipped=cellfun(@(z)z(1:minlen),collection,'uni',0);
[acc,gyr,mag]=deal(clipped{:})

Matt J on 7 Aug 2020
Like so,
collection = {acc,gyr,mag};
minlen = min(cellfun(@(z)size(z,1),collection));
clipped=cellfun(@(z)z(1:minlen,:),collection,'uni',0);
[acc,gyr,mag]=deal(clipped{:})
Adam Levschuk on 7 Aug 2020
thanks matt
Matt J on 7 Aug 2020
but note that,
>> isvector(rand(12000,3))
ans =
logical
0

Image Analyst on 7 Aug 2020
Maybe this:
lastRow = min([length(acc), length(gyr), length(mag)])
% Crop
acc = acc(1 : lastRow);
gyr = gyr(1 : lastRow);
mag = mag(1 : lastRow);

R2020a

### Community Treasure Hunt

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

Start Hunting!