4 ms·

How does adding Array(1.0, 2.0, 3.0, 4.0) and Array(4.0, 3.0, 2.0, 1.0) result in Array(1.7302967433402214, 2.547722557505166, 3.36514837167011

• QuercusMax 10y ago
  That does seem very strange.
• jordigh 10y ago
  Floats are weird and unpredictable like that. You can save yourself an RNG call if you simply add two floats. ;-) More seriously, the result here really is x + y/norm(y). I would be really interested in knowing what the bug is here. Probably just a C&P error that forgot to update the result, since y is unitized (in-place?) in a call further below.
• haifeng 10y ago
  Is there something wrong in your code? I don't see the effect. smile> val x = Array(1.0, 2.0, 3.0, 4.0) x: Array[Double] = Array(1.0, 2.0, 3.0, 4.0) smile> val y = Array(4.0, 3.0, 2.0, 1.0) y: Array[Double] = Array(4.0, 3.0, 2.0, 1.0) smile> x + y res2: smile.math.VectorAddVector = Array(5.0, 5.0, 5.0, 5.0)
  • sampo 10y ago
    I just quoted the example in the webpage (section "Vector Operations"), I didn't run it myself.
    • haifeng 10y ago
      Good eyes :) It should be a c&p error.
• sampo 10y ago
  Ok, they have fixed the website now.