4.Matrix and Array Expressions
Matrix and array operations can be assigned to a variable to store and manipulate multiple numbers at
the same time. It is also possible to get access and write to a single entry of the matrix. The matrix and
array are 0-indexed.
array = [1,2,3,4,5]
a = array[0]
array[2] = 10
matrix = [[1,2],[3,4],[5,6]]
b = matrix[0,0]
matrix[2,1] = 20
Matrix and array can bemanipulated bymatrix-matrix, array-array,matrix-array,matrixscalar and array-
scalar operations.
Matrix-matrix multiplication operations are supported if the first matrix’s number of columns matches
the second matrix’s number of rows. The resulting matrix will have the dimensions of the first matrix
number of rows and the second matrix number of columns.
C = [[1,2],[3,4],[5,6]] * [[10,20,30],[40,50,60]]
Matrix-array multiplication operations are supported if the matrix is the first operand and array is
second. If the matrix’s number of columns matches the arrays length, the resulting array will have the
length as the matrix number of rows.
C = [[1,2],[3,4],[5,6]] * [10,20]
Array-array operations are possible if both arrays are of the same length and supports: addition,
subtraction, multiplication, division and modulo operations. The operation is executed index by index on
both arrays and thus results in an array of the same length. E.g. a[i] b[i] = c[i].
mul = [1,2,3] * [10,20,30]
div = [10,20,30] / [1,2,3]
add = [1,2,3] + [10,20,30]
sub = [10,20,30] - [1,2,3]
mod = [10,20,30] % [1,2,3]
Scalar operations on a matrix or an array are possible. They support addition, subtraction,
multiplication, division and modulo operations. The scalar operations are done on all the entries of the
matrix or the array. E.g. a[i] + b = c[i]
mul1 = [1,2,3] * 5
mul2 = 5 * [[1,2],[3,4],[5,6]]
div1 = [10,20,30] / 10
div2 = 10 / [10,20,30]
e-Series 4 Script Manual
4.Matrix and Array Expressions
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