XploRe Help: Function Index

Keywords - Function Groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Matrix Manipulation

General Commands

diag

diag creates a diagonal matrix from a vector.

eye

creates a d-dimensional identity matrix

index

index generates a new matrix z from an old matrix x by resampling the rows of x depending on the index vector i.

matrix

matrix generates arrays up to eight dimensions.

paf

paf selects rows of an object depending on a given vector. All elements of the first argument are taken if the corresponding vector element is unequal to 0. Otherwise they are dropped.

unit

creates a d-dimensional identity matrix

zeros

generates arrays up to eight dimensions filled with zeros

Sorting and Counting

[]

[] gives a subarray of an array.

append

Appends an object to the specified list. If the appended object is temporary, the component gets the name el. If the first argument is not a list, it will be changed to a list with itself as first component.

cols

Returns the number of columns in an array.

cumprod

cumprod computes the cumulative product of the elements in an array regarding a given dimension.

cumsum

cumsum computes the cumulative sum of the elements an array regarding a given dimension.

delete

deletes the object at the given position from the list.

dim

dim gives the vector of the numbers of the elements in each dimension of an array.

dot

a dot gives an element of a list.

insert

inserts an object to the specified position within a list.

knn

computes a running mean over (2k+1) consecutive values of a given vector. To have the same length at the beginning and at the end the first and last value are repeated k times.

list

list generates lists from given objects. If an object is temporary the name of the component is el, otherwise the name of the object at this position.

mknn

mknn gives an array containing the indices of the k nearest neighbors of each element in matrix y with respect to x. The parameter y is optional, if it is not given, x will be taken for y. As a measure of distance the squared euclidean distance is used.

names

gives the names of all components of a list object.

prod

prod computes the product of the elements of an array regarding a given dimension.

reshape

reshape transforms an array into a new one with given dimensions.

rows

rows returns the number of rows in an array.

size

gives the number of elements contained in a list or array

sort

sort sorts the rows of a matrix. If column c1 is specified the matrix will be sorted with respect to column c1. That is, the rows of the matrix will be arranged in order that elements of column c1 are in ascending (descending) order.

sum

sum computes the sum of the elements of an array regarding a given dimension.

vec

vec reshapes all given arguments into a vectors and concatenates them into a single vector which is returned.

{}

{} gives an element of a list.

Keywords - Function Groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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