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The Maxima on-line user's manual

Algebra Calculator

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Fillarray Calculator

Fillarray

Function: fillarray (<A>, <B>) Fills array <A> from <B>, which is a list or an array.

array(P, 4, 3);
fillarray(P,           [0.02, 0.08, 0.03, 0.04,            0.05, 0.10, 0.02, 0.07,            0.20, 0.04, 0.20, 0.15]);
listarray(P);
P[4,3];

If a specific type was declared for <A> when it was created, it can only be filled with elements of that same type; it is an error if an attempt is made to copy an element of a different type.

If the dimensions of the arrays <A> and <B> are different, <A> is filled in row-major order. If there are not enough elements in <B> the last element is used to fill out the rest of <A>. If there are too many, the remaining ones are ignored.

fillarray returns its first argument.

Examples:

     Create an array of 9 elements and fill it from a list.
          (%i1) array (a1, fixnum, 8);
          (%o1)                          a1
          (%i2) listarray (a1);
          (%o2)              [0, 0, 0, 0, 0, 0, 0, 0, 0]
          (%i3) fillarray (a1, [1, 2, 3, 4, 5, 6, 7, 8, 9]);
          (%o3)                          a1
          (%i4) listarray (a1);
          (%o4)              [1, 2, 3, 4, 5, 6, 7, 8, 9]

When there are too few elements to fill the array, the last element is repeated. When there are too many elements, the extra elements are ignored.

          (%i1) a2 : make_array (fixnum, 8);
          (%o1)             {Array:  #(0 0 0 0 0 0 0 0)}
          (%i2) fillarray (a2, [1, 2, 3, 4, 5]);
          (%o2)             {Array:  #(1 2 3 4 5 5 5 5)}
          (%i3) fillarray (a2, [4]);
          (%o3)             {Array:  #(4 4 4 4 4 4 4 4)}
          (%i4) fillarray (a2, makelist (i, i, 1, 100));
          (%o4)             {Array:  #(1 2 3 4 5 6 7 8)}

     Multple-dimension arrays are filled in row-major order.
          (%i1) a3 : make_array (fixnum, 2, 5);
          (%o1)        {Array:  #2A((0 0 0 0 0) (0 0 0 0 0))}
          (%i2) fillarray (a3, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
          (%o2)        {Array:  #2A((1 2 3 4 5) (6 7 8 9 10))}
          (%i3) a4 : make_array (fixnum, 5, 2);
          (%o3)     {Array:  #2A((0 0) (0 0) (0 0) (0 0) (0 0))}
          (%i4) fillarray (a4, a3);
          (%o4)     {Array:  #2A((1 2) (3 4) (5 6) (7 8) (9 10))}

(%o1)                                true
(%i2) 

Fillarray Example

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