[Maxima] matrix indexing

[Ruida Yun]

Hi all,

I have read  a set of data from a .csv file into matrix m using numericalio.
This part works great so far.

My problem is how to subscripting the matrix like Matlab, because I really
need to plot/manipulate part of the matrix, for example, from the n_th row
to m_th row.

After digging out some old conversations on the mailing list, I've learned
that my best shot would be using amatrix package. I loaded the package but
ended up with this error:

m[[1,2],3]
apply: subscript must be an integer; found: [1,2]
 -- an error. To debug this try: debugmode(true);

m[1,all];
apply: subscript must be an integer; found: all
 -- an error. To debug this try: debugmode(true);

Is there any solution to this problem? Any help or suggestion is
appreciated.

Ruida
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