diff options
Diffstat (limited to 'src/pkg/rand/normal.go')
| -rw-r--r-- | src/pkg/rand/normal.go | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/pkg/rand/normal.go b/src/pkg/rand/normal.go index f4444dc68..25769c7bf 100644 --- a/src/pkg/rand/normal.go +++ b/src/pkg/rand/normal.go @@ -38,8 +38,8 @@ func absInt32(i int32) uint32 { func (r *Rand) NormFloat64() float64 { for { j := int32(r.Uint32()); // Possibly negative - i := j&0x7F; - x := float64(j)*float64(wn[i]); + i := j & 0x7F; + x := float64(j) * float64(wn[i]); if absInt32(j) < kn[i] { // This case should be hit better than 99% of the time. return x @@ -48,18 +48,18 @@ func (r *Rand) NormFloat64() float64 { if i == 0 { // This extra work is only required for the base strip. for { - x = -math.Log(r.Float64()) * (1.0/rn); + x = -math.Log(r.Float64()) * (1.0 / rn); y := -math.Log(r.Float64()); if y+y >= x*x { break } } if j > 0 { - return rn+x + return rn + x } return -rn - x; } - if fn[i] + float32(r.Float64())*(fn[i-1]-fn[i]) < float32(math.Exp(-.5 * x * x)) { + if fn[i]+float32(r.Float64())*(fn[i-1]-fn[i]) < float32(math.Exp(-.5*x*x)) { return x } } |