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Scripts >> Data processing

Script	Author
arab2roman Constructs a Roman numeric representation of a given integer (which should be typed as a real, not a string) between 1 and 3,999,999.	By Daniel January 11, 2009
bin2int Converts a binary sequence of any size into integer format	By Daniel December 24, 2008
bin2str Converts a binary sequence string to an ASCII string	By Daniel December 24, 2008
data_pack Packs the given data pieces into a single value and returns it as a condensed string	By Daniel December 24, 2008
data_unpack Unpacks data stored with data_pack function and stores the individual values in an array	By Daniel December 24, 2008
dec2hex Returns a hexadecimal string representation of some integer (which should be given as a real, not a string).	By Daniel January 11, 2009
draw_piechart Draws a pie chart illustrating the given list of data. The list does not need to be normalized; this is done automatically. Note that this function only draws the shape of the chart, not the labels....	By Daniel December 27, 2008
ds_grid_repr Returns a string representation of the given grid	By Daniel December 29, 2008
ds_list_concat Constructs (and returns) a concatenation of L1 and L2 without mofifying either of the two lists	By Daniel December 30, 2008
ds_list_filter Filters a list by calling script on each element and retaining only the elements for which the (1-ary) script returns true	By Daniel December 30, 2008
ds_list_foldl Folds a ds_list from right to left and returns the result. This works as follows. The first sub-result is obtained by executing scr with two arguments: init, and the last element of the list....	By Daniel January 3, 2009
ds_list_foldr Folds a ds_list from left to right and returns the result. This works as follows. The first sub-result is obtained by executing scr with two arguments: init, and the first element of the list....	By Daniel January 3, 2009
ds_list_map Transforms each element of a list by mapping it through a 1-ary script	By Daniel December 30, 2008
ds_list_max Returns the largest real in a list of reals	By Daniel December 26, 2008
ds_list_min Returns the smallest real in a list of reals	By Daniel December 26, 2008
ds_list_normalize Normalizes a list of reals so that all the entries add up to 1	By Daniel January 3, 2009
ds_list_random_element Returns a randomly-selected element of the given list	By Daniel December 26, 2008
ds_list_remove_redundancy Efficiently removes redundant elements from a list	By Daniel December 26, 2008
ds_list_repr Returns a string representation of a list in the form [E1, E2, ...]. Useful for debugging.	By Daniel December 26, 2008
ds_list_reverse Reverses the order of elements in some list with minimal overhead	By Daniel December 29, 2008
ds_list_sort_ext This script sorts a list using a given quantifier script. This should be a 1-ary script which takes a list element as input and returns a real value that can be used in sorting. For...	By Daniel December 26, 2008
ds_list_subset_can_sum Tests whether some subset of the given list has a given sum. The algorithm is fast with small (target) sums, but slow with larger ones.	By Daniel January 4, 2009
ds_list_sum Sums the entries in a list of reals	By Daniel December 26, 2008
ds_map_repr Returns a string representation of the given map	By Daniel December 29, 2008
ds_priority_repr Returns a string representation of the given priority queue	By Daniel December 29, 2008
ds_queue_invert inverts the order of numbers in a queue	By frederik October 18, 2009
ds_queue_repr Returns a string representation of the given queue	By Daniel December 29, 2008
ds_stack_repr Returns a string representation of the given stack	By Daniel December 29, 2008
equal Tests whether two pieces of data are equal in both type and content. Useful for avoiding errors from comparing strings with reals.	By Daniel December 26, 2008
get_bit Extracts one bit from some number n. bit=0 indicates the least significant bit (worth 1, usually written on the far right), bit=1 indicates the next (worth 2), and so forth; in...	By Daniel January 4, 2009
int2bin Converts an integer of any size into binary format	By Daniel December 24, 2008
parseInt Parse a numeric string in some specified base and the quantity as an integer	By Daniel March 21, 2009
set_bit Returns a modified version of n with some specified bit set to val. bit=0 indicates the least significant bit (worth 1, usually written on the far right), bit=1 indicates the next...	By Daniel January 4, 2009
str2bin Converts a regular string to a binary sequence string	By Daniel December 24, 2008
timediff Returns a string describing the given time interval (dt) in English. For example, timediff(10006060*34) will give "one day, ten hours".	By Daniel January 9, 2009
toString Generates a string representation of an integer using the specified base	By Daniel March 21, 2009

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Scripts >> Data processing