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The Maxima on-line user's manual

Algebra Calculator

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Read_matrix

Function: read_matrix (<S>)

load(draw);
 load (numericalio);
 s2 : read_matrix (file_search ("wind.data"));
 draw3d(         title = "Daily average wind speeds. Two data sets",         point_size = 2,         key        = "Sample from stations 1, 2 and 3",         points(args(submatrix (s2, 4, 5))),         point_type = 4,         key        = "Sample from stations 1, 4 and 5",         points(args(submatrix (s2, 2, 3))) );

Function: read_matrix (<S>, <M>)

Function: read_matrix (<S>, <separator_flag>)

Function: read_matrix (<S>, <M>, <separator_flag>) read_matrix(<S>) reads the source <S> and returns its entire content as a matrix. The size of the matrix is inferred from the input data; each line of the file becomes one row of the matrix. If some lines have different lengths, read_matrix complains.

read_matrix(<S>, <M>) read the source <S> into the matrix <M>, until <M> is full or the source is exhausted. Input data are read into the matrix in row-major order; the input need not have the same number of rows and columns as <M>.

The source <S> may be a file name or a stream.

The recognized values of <separator_flag> are comma, pipe, semicolon, and space. If <separator_flag> is not specified, the file is assumed space-delimited.

(%o1)                                true
(%i2) 

Related Examples

matrix

x:matrix([1, 0, 0], [...

y:matrix([cy, 0, -sy]...

z:matrix([cz, sz, 0],...

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matrix

I4 : matrix([1,0,0,0]...

C: matrix([1,-1,0,0],...

C2 : C.C;

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matrix-transpose

f(x,y,z):=[x+y+z,x+y-...

mf:transpose(matrix(f...

m2:matrix(f(1,0,0),f(...

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matrix-triangularize

M: matrix ([1, 0, 0, ...

triangularize (M);

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matrix-modulus

modulus:5;

p:matrix([[a,b],[c,d]]);

middle:matrix([[2,0],...

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matrix-transpose

A : matrix([a,b],[a+d...

At : transpose(A);

C : matrix([c],[c+d]);

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matrix

R=matrix([1,0,0,-1,0,...

Dip=matrix([0,-d,-d,-...

R^-1*Dip*R;

Calculate

matrix

c: matrix([a,b],[c,d]);

Calculate

matrix-transpose

a: matrix ([1, 1, 1],...

inverse(a.transpose(a));

Calculate

matrix

K : matrix( [1.000,...

W : matrix( [0.316,...

Q : matrix( [0.000,...

Calculate