Problem 2159. A SUBSREF variant that accepts the 'end'-operator.
Unfortunately, Matlab's subsref function does not support the end -operator. The end -operator is a powerfull method to refer to the rear-end of an array,
a = 1:10; a(end-1) % is 9 a(end-2:end) % is [8 9 10]
It works similar for cell arrays and struct-arrays.
Alhough subsref is quite powerful, and accepts for example the : colon oparator, it fails to process more complex stings, including end -operators.
This assignment is to create a function that accepts those more complex element definitions.
For example
s.a.b(3).c{2}.d = 'a':'z'; subsref(s,substruct('.','a','.','b','()',{3},'.','c','{}',{2},'.','d','()',{1:3}))
returns
ans =
abc
And
subsrefbetter(s,substruct('.','a','.','b','()',{3},'.','c','{}',{2},'.','d','()',{'[1 end]'}))
should return
ans =
az
and
subsrefbetter(s,substruct('.','a','.','b','()',{3},'.','c','{}',{2},'.','d','()',{'end-2:end'}))
should return
ans =
xyz
The function subsrefbetter should accept both structures like created with substruct, and list of arguments like accepted by substruct.
That's all.
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1 Comment
Pity that eval is forbidden - I had quite an elegant solution using it.
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