norm2.Rd
This function is used to compute the row-wise vector norm of X if X is a matrix. If X is a vector (row or column), v is the vector norm.
norm2(X)
X | A data structure, vector or matrix. |
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The row-wise vector-norm of matrix X, i.e., the square-root of the sum of the squares for each row. If X is a vector (row or column), v is the vector norm and norm2() is equivalent to the built-in function norm(). But if X is a matrix e.g., a triaxial accelerometer or magnetometer matrix, norm() gives the overall norm of the matrix whereas norm2() gives the vector norm of each row (i.e., the field strength in the case of a magnetometer matrix).
sampleMatrix <- matrix(c(0.2, 0.4, -0.7, -0.3, 1.1, 0.1), byrow = TRUE, nrow = 2, ncol = 3) norm2(X = sampleMatrix) # Result: c(0.83066, 1.14455)