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+ Addition | - Subtraction | |
* Multiplication | / Division | |
^ Power |
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The boolean operators are :
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Operations between lists and numbers. op is any of the operations defined above.
list ( list and list )
list ( list or list )
list ( not list )
Conjunction, Disjunction and Negation.
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list ( list and number ) list ( number or list )
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# copies elements 1, 5, 9, 13, 17 of x into y
Y = X[1,20,4]
list list[vector]
Extract a selection of elements from a list. The vector supplied as the argument provides the set of indices to be used. For example:
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Tests whether a value is in a list or not. Returns a 0 (false) or 1 (true)
list ( list & list )
Concatenate two lists. Note that to add a single element to a list, it must first be converted into a single-element list, for example:
mylist = mylist & [23]
list abs( list )
list acos( list )
list asin( list )
list atan( list )
list cos( list )
list exp( list )
list int( list )
list log( list )
list log10( list )
list neg( list )
list sgn( list )
list sin( list )
list sqrt( list )
list tan( list )
list div( list,list )
list max( list,list )
list min( list,list )
list max( list,number )
list min( list,number )
list mod( list,list )
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This shows that the types of the elements in the input lists are not restricted – a list can contain many different data types (e.g. [number, vector, geopoints]) and as long as the requested function is valid for each type, the correct result will be returned. If the requested operation is illegal for that element (e.g. sin(['hello'])) then it will fail on that element. See the descriptions of these functions for the relevant data types.
Anchor count count
number count( list )
Returns the number of elements in a list.
Anchor
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find find
number or list find( list,any )number or list find( list,any,string )
Searches the given list for an item and returns the index of the first occurrence of it. If an optional third argument is given as the string 'all', then a list of the indexes of all occurrences of the item is returned. In both cases, if the item is not contained in the list, nil is returned.
Anchor
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list list
list list( any,any,...)
Returns a list built from its arguments.
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Anchor sort sort
list sort( list )
Sorts a list in ascending order.
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list sort( list,string )
Sorts a list given a comparison, expressed as a string : Ascending "<", descending ">"; you may specify the sorting criterium in a comparison function :
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Note that it is not valid to sort a list which contains more than one type of data element.
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Anchor sort_indices sort_indices
list sort_indices( list )list sort_indices( list,string )
Sorts a list and returns the sorted indices. The default behaviour is to sort in ascending order unless an alternative comparison function is provided. See example under sort_and_indices() to see how this function works.
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Anchor sort_and_indices sort_and_indices
list sort_and_indices( list)
list sort_and_indices( list,string )
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Original list : [10,12,9,7,6]
Sorted list : [6,7,9,10,12]
Sorted indices : [5,4,3,1,2]
Sort and indices : [[6,5],[7,4],[9,3],[10,1],[12,2]]
Anchor unique unique
list unique( list )
Returns a list of the unique elements in the input list.
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Anchor vector vector
vector vector( list )
Returns a vector containing the numeric elements of the input list. Any nil list elements are converted to vector_missing_value. Any other non-numeric elements will cause an error. If the input list is empty, the function returns nil.
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