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tools:matrix:start

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tools:matrix:start [2022/04/07 12:23] – ursgraftools:matrix:start [2022/04/20 12:45] – [Vectors and Matrices] ursgraf
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 Vector3<> v;  Vector3<> v; 
 </code> </code>
-as ''Vector3'' is a predefined type with three dimensions and the default element type is ''double''. A ''Vector3'' is identical to the type ''Matrix<3,1,double>''. The vector could be initializer as follows+as ''Vector3'' is a predefined type with three dimensions and the default element type is ''double''. A ''Vector3'' is identical to the type ''Matrix<3,1,double>''. The vector could be initialized as follows
 <code cpp> <code cpp>
 v = {1.5, -2, 0} v = {1.5, -2, 0}
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      7, 8, 9;      7, 8, 9;
 </code> </code>
-The first three numbers will be filled into the first colon. While the internal representation is simply a one dimensional vector, the matrix could be visualized as +The first three numbers will be filled into the first row. While the internal representation is simply a one dimensional vector, the matrix could be visualized as 
  
 | ^col0^col1^col2^ | ^col0^col1^col2^
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 ^row1|4|5|6| ^row1|4|5|6|
 ^row2|7|8|9| ^row2|7|8|9|
 +When declaring and initializing a matrix, the values must be given colon per colon. The same matrix as given above would be initialized as follows  
 +<code cpp> 
 +Matrix<3, 3, int> m{1, 4, 7, 2, 5, 8, 3, 6, 9}; 
 +</code>  
 ===== Accessing Elements ===== ===== Accessing Elements =====
 You can access rows, columns or single elements of matrices with the following methods: You can access rows, columns or single elements of matrices with the following methods:
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 m.get(0,0);  // returns element, 1 m.get(0,0);  // returns element, 1
 m.get(1,0);  // returns element, 4 m.get(1,0);  // returns element, 4
-m.getRow(1);  // returns row, [2,5,8] +m.getRow(1);  // returns row, [4,5,6] 
-m.getCol(0);  // returns column, [1,2,3]' +m.getCol(0);  // returns column, [1,4,7]' 
-m.getSubMatrix<2,2>(0,1);   // returns matrix [[4,5][7,8]]+m.getSubMatrix<2,2>(0,1);   // returns matrix [[2,5][3,6]]
 </code> </code>
 Single elements, rows or columns can be written with the methods //set()//, //setRow()//, or //setCol()//.  Single elements, rows or columns can be written with the methods //set()//, //setRow()//, or //setCol()//. 
tools/matrix/start.txt · Last modified: 2022/04/20 13:29 by ursgraf