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Tina Müller 2016-12-05 23:44:36 +01:00
parent 9dc3c2bb62
commit bba7bfd280
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Task/Averages-Simple-moving-average/Lasso/averages-simple-moving-average.lasso Normal file
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define simple_moving_average(a::array,s::integer)::decimal => {
#a->size == 0 ? return 0.00
#s == 0 ? return 0.00
#a->size == 1 ? return decimal(#a->first)
#s == 1 ? return decimal(#a->last)
local(na = array)
if(#a->size <= #s) => {
#na = #a
else
local(ar = #a->ascopy)
#ar->reverse
loop(#s) => { #na->insert(#ar->get(loop_count)) }
}
#s > #na->size ? #s = #na->size
return (with e in #na sum #e) / decimal(#s)
}
// tests:
'SMA 3 on array(1,2,3,4,5,5,4,3,2,1): '
simple_moving_average(array(1,2,3,4,5,5,4,3,2,1),3)
'\rSMA 5 on array(1,2,3,4,5,5,4,3,2,1): '
simple_moving_average(array(1,2,3,4,5,5,4,3,2,1),5)
'\r\rFurther example: \r'
local(mynumbers = array, sma_num = 5)
loop(10) => {^
#mynumbers->insert(integer_random(1,100))
#mynumbers->size + ' numbers: ' + #mynumbers
' SMA3 is: ' + simple_moving_average(#mynumbers,3)
', SMA5 is: ' + simple_moving_average(#mynumbers,5)
'\r'
^}