How to label a matrix

I have following code, I wanna give label to a matrix with 1 or -1 based on the type. I know it will give an error "Subscript indices must either be real positive integers or logicals." But I don't have any idea how to fix it.

if jenis == 1
  T(feature)= 1;
else
  T(feature)= -1;
end

Please help me anyone. Thank you.

[dpb]

If you mean feature is supposed to be -1|1, then no, "You can't do that!". Scale to use [1|2] instead if insist on using array indices as the segregating method.

Rather, I'd suggest keeping a corollary variable instead; it could be categorical rather than numeric. The table might be useful here... <table>

[Image Analyst]

What is jenis? A scalar? Your matrix?

What is feature? It must be natural integers starting with 1, like 1,2,3,4,5,....etc.

What is the name of your matrix? jenis? Or T? Or something else???

Answer 1

[Jan]

What about using a struct?

T.data    = rand(5);
T.feature = -1;   % or +1

[Tuffahatul Ummah]

Sorry, but the toolbox I use can't receive a struct data.

[dpb]

Well, it would certainly help to see an actual illustration of how you think you need to use this "feature"...otherwise we're only able to say "here's a rock" and you keep saying, "no, not that rock!" (much like a DOE program manager I worked for many, many years ago until I finally broke him :) ).