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  2. Help:Advanced table formatting - Wikipedia

    en.wikipedia.org/wiki/Help:Advanced_table_formatting

    Cut cells into parts: Instead of trying to make a super-cell that spans rows/columns, split it into smaller cells while leaving some cells intentionally empty. Use a non-breaking space with   or {} in empty cells to maintain the table structure. Custom CSS styling: Override the wikitable class defaults by explicitly specifying:

  3. Centering matrix - Wikipedia

    en.wikipedia.org/wiki/Centering_matrix

    It can be used not only to remove the mean of a single vector, but also of multiple vectors stored in the rows or columns of an m-by-n matrix . The left multiplication by C m {\displaystyle C_{m}} subtracts a corresponding mean value from each of the n columns, so that each column of the product C m X {\displaystyle C_{m}\,X} has a zero mean.

  4. Correspondence analysis - Wikipedia

    en.wikipedia.org/wiki/Correspondence_analysis

    Before proceeding to the central computational step of the algorithm, the values in matrix C have to be transformed. [10] First compute a set of weights for the columns and the rows (sometimes called masses), [7] [11] where row and column weights are given by the row and column vectors, respectively:

  5. Birkhoff algorithm - Wikipedia

    en.wikipedia.org/wiki/Birkhoff_algorithm

    The positivity graph of an n-by-n matrix X is a bipartite graph with 2n vertices, in which the vertices on one side are n rows and the vertices on the other side are the n columns, and there is an edge between a row and a column iff the entry at that row and column is positive.

  6. Rijndael MixColumns - Wikipedia

    en.wikipedia.org/wiki/Rijndael_MixColumns

    void gmix_column (unsigned char * r) {unsigned char a [4]; unsigned char b [4]; unsigned char c; unsigned char h; /* The array 'a' is simply a copy of the input array 'r' * The array 'b' is each element of the array 'a' multiplied by 2 * in Rijndael's Galois field * a[n] ^ b[n] is element n multiplied by 3 in Rijndael's Galois field */ for (c = 0; c < 4; c ++) {a [c] = r [c]; /* h is set to ...

  7. Row and column spaces - Wikipedia

    en.wikipedia.org/wiki/Row_and_column_spaces

    rank(A) = the maximum number of linearly independent rows or columns of A. [5] If the matrix represents a linear transformation, the column space of the matrix equals the image of this linear transformation. The column space of a matrix A is the set of all linear combinations of the columns in A. If A = [a 1 ⋯ a n], then colsp(A) = span({a 1 ...

  8. Hadamard matrix - Wikipedia

    en.wikipedia.org/wiki/Hadamard_matrix

    The elements in the first column and the first row are all positive. The elements in all the other rows and columns are evenly divided between positive and negative. Sylvester matrices are closely connected with Walsh functions. Binary Hadamard matrix as a matrix product. The binary matrix (white 0, red 1) is the result with operations in F 2.

  9. Energy distance - Wikipedia

    en.wikipedia.org/wiki/Energy_distance

    Energy distance is a statistical distance between probability distributions.If X and Y are independent random vectors in R d with cumulative distribution functions (cdf) F and G respectively, then the energy distance between the distributions F and G is defined to be the square root of