Grabbing sections of a matrix by using two doubles as the index

Question

Ben Anstrom 2019-12-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/497864-grabbing-sections-of-a-matrix-by-using-two-doubles-as-the-index

评论： Ben Anstrom 2019-12-24

采纳的回答： James Tursa

Hello everyone,

I am trying to access sections of an array such as:

data = [10 10.5 11.5 13 15 16 20.5 24];

by using the following two arrays:

indStart = [1 0 0 0 1 0 0 0]; indEnd = [0 0 1 0 0 0 0 1];

The final output should look something like this:

result = { [10 1.5 11.5] }

{ [15 16 20.5 24] }

This is what i have tried, along with little variations of it:

result{ : } = data(indStart : indEnd);

The results of my method is either an error, or i can access 1:3, but not get 5:8.

I know i can do this quite easily with a for loop, but i am trying to accomplish this using indexing and logical statements so that processing time stays down. The final script needs to be processed by ga(), so any cut down on processing time is very valuable.

Thank you to anyone who can help!