Two ways to iterate over an array

One, normal array:

1, Subscript traversal:

v=[1,4,6,4,1]; s=0; For I=1:length (v) S=s+v (i); End Disp (s);

Results: 16

2, Element traversal:

v=[1,4,6,4,1]; s=0; For Ve=v S=s+ve; End Disp (s);

Results: 16

Two, an array of cells:

1, subscript traversal

strvec={' i ', ' am ', ' Iwantnon '}; Str=[]; For I=1:length (Strvec) Str=[str, ', strvec{i}]; End Disp (str);

Results: I am iwantnon

2, Element traversal:

strvec={' i ', ' am ', ' Iwantnon '}; Str=[]; For S=strvec Str=[str, ', s{1}]; End Disp (str);

Results: I am iwantnon

Note: Two, 2 in S is the 1*1 cell, need to access the s{1}.

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An application of element traversal:

If the elements of the traversed array are themselves subscript (for example, the return value of the Find function, the index array), then it is more natural to iterate with the elements:

Index=find (a==0); For I=index A (i) = ...; End