Tables and Arrays - Overview arraytoimage

Array Functions


These functions work with lua tables containing only values that are numbers, no keys, and no sub-tables. This special type of table is called an Array. Nearly all of these functions support only 1-dimensional arrays which, by definition, contain no sub-tables that add dimensions to the 1-dimensional array. However, the arraytoimage function supports 2-dimensional arrays. Most of these functions work with a CImage class object. Several also work with a CArray class object or a list of numbers.

Array Functions

add

Adds a number to the members of a 1-dimensional array, CImage object, a single number.

arraytoimage

Converts a 1- or 2-dimensional array to a 1- or 2-dimensional CImage object.

div

Divides a number into the members of a 1-dimensional array, CImage object, or single number.

dot

Returns the dot product of two class objects or 1-dimensional arrays of numbers.

fitpoly1d

Fits a polynomial function of n coefficients to (x, y) data with an optional weight array.

fitpoly2d

Fits a polynomial function of n x m coefficients to (x, y, z) data with an optional weight array.

gaussdev

Returns a 1-dimensional array of Gaussian random deviates (numbers). Also see gaussdev1.

hist

Computes the histogram of a 1-dimensional array and returns it in a table. This uses the CHistogram class function. Also see histplot.

list

Lists the contents of a table.

max

Returns the maximum value in a 1-dimensional array, CImage object, or list of numbers.

maxxy

Returns the maximum value in a 1-dimensional array, CImage object, or list of numbers.

mean

Returns the mean value for an array, CImage object, or list of numbers.

meansdev

Returns the mean and standard deviation for an array, CImage object, or list of numbers.

median

Returns the median value for a 1-dimensional array, CImage object, or list of numbers.

mediansdev

Returns the median and standard deviation for a 1-dimensional array, CImage object, or list of numbers.

min

Returns the minimum value in a 1-dimensional array, CImage object, or list of numbers.

minxy

Returns the minimum value in a 1-dimensional array, CImage object, or list of numbers.

mul

Multiples each member of a 1-dimensional array, CImage object, or a number, by a specified number.

norm

Normalizes the numbers of a 1-dimensional array, CImage or CArray object, so their sum is 1.0.

random

Returns a 1-dimensional array of uniformly distributed random numbers. Also see random1.

reverse

Reverses a 1-dimensional array with regard to the order of the array indices.

round

Rounds a 1-dimensional array to the nearest integer.

sdev

Returns the standard deviation of a 1-dimensional array or list of numbers.

series

Returns a 1-dimensional array containing uniformly spaced numbers.

sort

Sorts the numbers of a 1-dimensional array into ascending order.

sortr

Sorts the numbers of a 1-dimensional array into descending order.

stats

Returns a 1-dimensional array of 8 elements containing basic statistics for a 1-dimensional array. The returned values include the mean, median, minimum, maximum, standard deviation, skewness, kurtosis, and number of points.

sub

Subtracts a number from the members of a 1-dimensional array or number.

sum

Returns the sum of a 1-dimensional array or list of numbers.

Related Topics

Contents

Table and Array Functions

Table Functions

CArray Class

CStats Class

CImage Class

CHistogram class


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