7.2.1 version of MathGraph32 brings up the two new functions to be applied on matrices :
– If A is a matrix of n lines and p columns, function sortbyrow(A, k) returns a new matrix of n lines and p columns formed with the columns of matrix A sorted by increasing order of the cells of the line number k of matrix A (for k ranging between 1 and n).
– If A is a matrix of n lines and p columns, function sortbycol(A, k) returns a new matrix of n lines and p columns formed with the lines of matrix A sorted by increasing order of the cells of the coloumn number k of matrix A (for k ranging between 1 and p).
Here is an exemple : if A is the matrix $\left( \begin{array}{l} 5 & 1 & 2 \\ 2 & 3 & 1 \\ 1 & 2 & 5 \end{array} \right)$
The matricial calculation B = sortbyrow(A,2) will return matrix $\left( \begin{array}{l} 2 & 5 & 1 \\ 1 & 2 & 3 \\ 5 & 1 & 2 \end{array} \right)$
And matricial calculation C = sortbycol(A,3) will return matrix $\left( \begin{array}{l} 2 & 3 & 1 \\ 5 & 1 & 2 \\ 1 & 2 & 5 \end{array} \right)$
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