forum-msg-id-128205-edit

Original date:2015-05-31 16:26:59 Edited by: irv Subject: Re: Average of 2-D array

jimcbrown said...

Maybe this is a bug... average() won't fail but just return an incorrect answer.

Technically, you're correct. average doesn't fail, it causes sum to fail with a type-check error, even though sum can handle the array when it's passed directly.

/usr/local/share/euphoria/include/std/stats.e:490 in function sum() type_check failure, result_ is {1,2,3,4,5,6,7,8,9,10}

The 'array' being passed looks like this (yep. elementary-school multiplication tables)

{ 
  {1,2,3,4,5,6,7,8,9,10}, 
  {2,4,6,8,10,12,14,16,18,20}, 
  {3,6,9,12,15,18,21,24,27,30}, 
  {4,8,12,16,20,24,28,32,36,40}, 
  {5,10,15,20,25,30,35,40,45,50}, 
  {6,12,18,24,30,36,42,48,54,60}, 
  {7,14,21,28,35,42,49,56,63,70}, 
  {8,16,24,32,40,48,56,64,72,80}, 
  {9,18,27,36,45,54,63,72,81,90}, 
  {10,20,30,40,50,60,70,80,90,100} 
} 

? sum(x) gives 3025 average(x) gives the error message above.

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