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2016 Update

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Tina Müller 2016-12-05 22:15:40 +01:00
parent 948b86eafa
commit dcf5d15da3
7965 changed files with 139854 additions and 31002 deletions
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47
Task/Forward-difference/REXX/forward-difference-1.rexx
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@ -1,24 +1,23 @@
/*REXX program computes the forward difference of a list of numbers. */
numeric digits 100 /*ensure enough accuracy (decimal digs)*/
parse arg e ',' N /*get a list: ε1 ε2 ε3 ε4 ··· , order */
if e=='' then e='90 47 58 29 22 32 55 5 55 73' /*use some default numbers. */
#=words(e) /*# is the number of elements in list.*/
/* [↓] assign list numbers to @ array.*/
do i=1 for #; @.i=word(e,i)/1; end /*process each number one at a time. */
/* [↓] process the optional order. */
if N=='' then parse value 0 # # with bot top N /*define default order range. */
else parse var N bot 1 top /*Specified? Use only 1 order*/
say right(# 'numbers:', 44) e /*display the header (title) and ··· */
say left('',44)copies('─',length(e)+2) /*display the header fence. */
/* [↓] where da rubber meets da road. */
do o=bot to top; do r=1 for #; !.r=@.r; end; $=
do j=1 for o; d=!.j; do k=j+1 to #; parse value !.k !.k-d with d !.k; end
end /*j*/
do i=o+1 to #; $=$ !.i/1; end
if $=='' then $='[null]'
say right(o,7)th(o)'─order forward difference vector =' $
end /*o*/
exit /*stick a fork in it, we're all done. */
/*────────────────────────────────────────────────────────────────────────────*/
th: arg ?; return word('th st nd rd',1+?//10*(?//100%10\==1)*(?//10<4))
/*REXX program computes the forward difference of a list of numbers. */
numeric digits 100 /*ensure enough accuracy (decimal digs)*/
parse arg e ',' N /*get a list: ε1 ε2 ε3 ε4 ··· , order */
if e=='' then e=90 47 58 29 22 32 55 5 55 73 /*Not specified? Then use the default.*/
#=words(e) /*# is the number of elements in list.*/
/* [↓] assign list numbers to @ array.*/
do i=1 for #; @.i=word(e, i)/1; end /*i*/ /*process each number one at a time. */
/* [↓] process the optional order. */
if N=='' then parse value 0 # # with bot top N /*define the default order range. */
else parse var N bot 1 top /*Not specified? Then use only 1 order*/
say right(# 'numbers:', 44) e /*display the header title and ··· */
say left('', 44)copies('─', length(e)+2) /* " " " fence. */
/* [↓] where da rubber meets da road. */
do o=bot to top; do r=1 for #; !.r=@.r; end /*r*/; $=
do j=1 for o; d=!.j; do k=j+1 to #; parse value !.k !.k-d with d !.k; end /*k*/
end /*j*/
do i=o+1 to #; $=$ !.i/1; end /*i*/
if $=='' then $=' [null]'
say right(o, 7)th(o)'─order forward difference vector =' $
end /*o*/
exit /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
th: procedure; x=abs(arg(1)); return word('th st nd rd',1+x//10*(x//100%10\==1)*(x//10<4))