How to tell loop how many values to skip?

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MC3105 2014-9-28

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https://ww2.mathworks.cn/matlabcentral/answers/156576-how-to-tell-loop-how-many-values-to-skip

编辑： MC3105 2014-9-28

采纳的回答： Star Strider

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Hello everyone!

I want to create a loop similar to:

t=1:24:300

BUT I don't want the loop to skip 24 values after every run-through. After each run-through I want to tell the loop exactly how many values it should skip.

For example: The first run-through should be from 1:24, the second should be from 25:30, the third should be from 31:50.... and the last one from 277:300.

Is this possible in matlab?

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José-Luis 2014-9-28

编辑：José-Luis 2014-9-28

Do you know the values beforehand or will they be calculated inside the loop? Also, I don't really understand what you mean by 25:30, 31:50, etc...

MC3105 2014-9-28

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I just found a solution :)

I can do

t=1:s:300

then I can calculate the number of steps to skip within the loop :)

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Answer 1

Star Strider 2014-9-28

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This seems to do what you want:

X = linspace(0, 10, 300);           % Create Data Vector
t = [0  24  30  50  276  300];      % Partition Index Vector
for k1 = 1:length(t)-1
    Y{k1} = X(t(k1)+1:t(k1+1));
end

The cell array ‘Y’ has your partitioned sections from vector ‘X’. Create ‘t’ to be whatever values you want. I used the numbers you defined in your Question in this example.

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MC3105 2014-9-28

编辑：MC3105 2014-9-28

unfortunately i don't know beforehand how my intervals will look like..

but I just found my solution: it's possible to do t=1:s:24 and then calculate the number of steps that the loop should skip before the next run-through as s within my loop :)

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Answer 2

Marc 2014-9-28

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It is definitely possible but your logic is not very clear. Since you are choosing odd intervals, is there some underlying reason for 1 thru 24 followed by 25 thru 30, etc. etc.

You could use if/else-if/else or switch/case or while but we would need to have some condition met to move to the next run, and so on.