96 lines
2.3 KiB
Markdown
96 lines
2.3 KiB
Markdown
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# Assign
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Copies a matrix, vector or array with auto cast.
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```
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bool matrix::Assign(
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const matrix<T> &mat // copied matrix
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);
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bool matrix::Assign(
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const void &array[] // copied array
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);
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bool vector::Assign(
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const vector<T> &vec // copied vector
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);
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bool vector::Assign(
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const void &array[] // copied array
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);
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```
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Parameters
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m, v or array
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[in] The matrix, vector or array the values are copied from.
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Return Value
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Returns true if successful, otherwise — false.
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Note
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Unlike [Copy](/en/docs/matrix/matrix_manipulations/matrix_copy), the Assign method allows copying arrays as well. In this case, the auto cast takes place, while the resulting matrix or vector adjusts to the size of the copied array.
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Example:
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```
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//--- copy the matrices
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matrix a= {{2, 2}, {3, 3}, {4, 4}};
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matrix b=a+2;
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matrix c;
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Print("matrix a \n", a);
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Print("matrix b \n", b);
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c.Assign(b);
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Print("matrix c \n", a);
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//--- copy the array to the matrix
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matrix double_matrix=matrix::Full(2,10,3.14);
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Print("double_matrix before Assign() \n", double_matrix);
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int int_arr[5][5]= {{1, 2}, {3, 4}, {5, 6}};
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Print("int_arr: ");
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ArrayPrint(int_arr);
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double_matrix.Assign(int_arr);
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Print("double_matrix after Assign(int_arr) \n", double_matrix);
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/*
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matrix a
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[[2,2]
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[3,3]
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[4,4]]
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matrix b
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[[4,4]
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[5,5]
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[6,6]]
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matrix c
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[[2,2]
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[3,3]
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[4,4]]
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double_matrix before Assign()
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[[3.14,3.14,3.14,3.14,3.14,3.14,3.14,3.14,3.14,3.14]
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[3.14,3.14,3.14,3.14,3.14,3.14,3.14,3.14,3.14,3.14]]
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int_arr:
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[,0][,1][,2][,3][,4]
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[0,] 1 2 0 0 0
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[1,] 3 4 0 0 0
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[2,] 5 6 0 0 0
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[3,] 0 0 0 0 0
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[4,] 0 0 0 0 0
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double_matrix after Assign(int_arr)
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[[1,2,0,0,0]
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[3,4,0,0,0]
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[5,6,0,0,0]
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[0,0,0,0,0]
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[0,0,0,0,0]]
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*/
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```
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See also
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[Copy](/en/docs/matrix/matrix_manipulations/matrix_copy)
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