x = j:i:k creates a regularly-spaced vector x using i as the increment between elements. What about x = j:i:k:m? or j:i:k:m:n?
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I hope I am clear enough. I think it is very odd that this works with how many elements you want to separate with colons. It appears to disregard any elements in between the first and last.
This doesn't appear in the documentation.
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James Tursa
2018-2-23
编辑:James Tursa
2018-2-23
This is simply left-to-right operator evaluation.
j:i:k:m:n
evaluates as
(j:i:k):m:n
And, as stated in the doc:
"If you specify nonscalar arrays, then MATLAB interprets j:i:k as j(1):i(1):k(1)."
So your syntax, although probably confusing, is covered in the doc and simply uses the first element of the created vectors at each intermediate result when generating the next intermediate result.
EDITED to delete comments that didn't apply
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James Tursa
2018-2-23
编辑:James Tursa
2018-2-23
You're right. I was using 1:2:3:4 as one of the test cases for my spot testing, but that doesn't match your five element pattern so that part of my answer didn't apply. I have edited my answer.
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