How to use indexing to identify data in data(1, :) from points identifed in data(2,:)?
7 views (last 30 days)
Show older comments
Tomaszzz
on 21 May 2022
Commented: Walter Roberson
on 22 May 2022
Hi all,
I have a 2x17205 array (called vas_med_env; attached).
in vas_med_env(2,:) I have identified :
j= [5.8150 6.8350 7.8550 8.850]
Now I want to use j, to ''extract' data in vas_med_env(1,:) , by using indexing
my approach below:
n = length(j)-1;
vas_med_cycle = cell(n,1) ;
for i = 1:n
vas_med_cycle{i} = (vas_med_env(1, :),(vas_med_env(2, :),j(i):j(i+1))) ;
end
results in
vas_med_cycle{i} = (vas_med_env(1, :),(vas_med_env(2, :),j(i):j(i+1))) ;
↑
Error: Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check
for mismatched delimiters.
Can you help please?
0 Comments
Accepted Answer
Walter Roberson
on 21 May 2022
You have a right-hand side expression of the form
(A, (B, C))
That has no meaning in MATLAB.
MATLAB does not define any way to create "tuples". That expression would not create a tuple in which the first element is A and the second element is a tuple in which the first element is B and the second element is C.
Perhaps you meant
vas_med_cycle{i} = {vas_med_env(1, :), {vas_med_env(2, :),j(i):j(i+1)}} ;
or perhaps you meant
vas_med_cycle{i} = [vas_med_env(1, :), vas_med_env(2, :), j(i):j(i+1)] ;
4 Comments
Walter Roberson
on 22 May 2022
I wonder if you want something closer to
idx1 = j(1):j(2)-1;
idx2 = j(2):j(3)-1;
idx3 = j(3):j(4);
More Answers (0)
See Also
Categories
Find more on Startup and Shutdown 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!