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The Maxima on-line user's manual

Algebra Calculator

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Read_hashed_array

Function: read_hashed_array (<S>, <A>)

array (A, 2, 3);
read_array (file_search ("array.data"), A, comma);
arraylist (A);
A;
read_hashed_array (file_search ("array.data"), B, comma);
arraylist (B);
B[Schmidt];

Function: read_hashed_array (<S>, <A>, <separator_flag>) Reads the source <S> and returns its entire content as a hashed array. The source <S> may be a file name or a stream.

read_hashed_array treats the first item on each line as a hash key, and associates the remainder of the line (as a list) with the key. For example, the line 567 12 17 32 55 is equivalent to A[567]: [12, 17, 32, 55]$. Lines need not have the same numbers of elements.

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

array-fillarray-listarray

array(P, 4, 3);

fillarray(P, ...

listarray(P);

Calculate

array

array(T, 901);

array(N_c, 901);

array(N_v, 901);

Calculate

array-listarray-pi

array (aa, 2, 3);

aa [2, 3] : pi;

listarray (aa);

Calculate

array-expand-plot2d
plot2d([[discrete, p],f(x)], [x,0,4], [style, points, lines],  [color, red, blue], [point_type, asterisk],  [legend, "data", "approximation"], [xlabel, "x"], [ylabel, "y"]);

p:[[3.1,3.5],[2.5,1.2...

n:6;

array (d, n, n);

Calculate

array

array([arrx,arry],101);

i:0;

for x: 0 step %pi/50 ...

Calculate

array-listarray-random

array (aa, 100);

for i : 0 thru 100 d...

listarray (aa);

Calculate

array

array(a,2,3,4);

a(2);

Calculate

array-arrayinfo

array (name, 2,3,4,5,6);

arrayinfo(name);

Calculate