Creating a vector using conditions and a cell.
1 view (last 30 days)
Show older comments
This is what I have in the workspace. I have 3 acceleration vectors (one column each): Ax (799x1 double), Ay(799x1 double) and Az(799x1 double). Also I have a cell called activities: activities (1x4 cell) with this code:
Activities={'Walking','Sitting','Standing','Laying'};
Walking=1;
Sitting=2;
Standing=3;
Laying=4;
What I want to do is to create another vector called "actid"(799x1 double) using this conditions:
if Ay>10
actid=1; %Walking
elseif Ay>5 & Ay<7.5
actid=2; %Sitting
elseif Ay<10 & Ay>9
actid=3; %Standing
elseif Ay<1 & Az>9
actid=4; %Laying
end
Running this code I can't get what I want.
I don't know if it is possible to do.
Thank you.
3 Comments
Stephen23
on 16 Jul 2021
"operate on the entire vectors". Can you give me a simple example?"
Simon Chan's answer is an example. Indexing would be another vectorized approach. See:
The difference is thinking in terms of matrices/arrays, not individual elements.
Accepted Answer
Simon Chan
on 15 Jul 2021
Edited: Simon Chan
on 15 Jul 2021
Try this:
Zeros in the matrix means all conditions are not meet
actid=(Ay>10) + (Ay>5 & Ay<7.5)*2 + (Ay<10 & Ay>9)*3 + (Ay<1 & Az>9)*4
0 Comments
More Answers (0)
See Also
Categories
Find more on Matrix Indexing in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!