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Fix buggy rect(), doc comment, and unit test.

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This commit is contained in:
Charles Blake
2015-02-28 19:21:52 -05:00
parent 2df10fc4a6
commit 840f80e45c
1 changed files with 4 additions and 3 deletions
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7
lib/pure/complex.nim
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@@ -365,9 +365,9 @@ proc polar*(z: Complex): tuple[r, phi: float] =
result.phi = phase(z)
proc rect*(r: float, phi: float): Complex =
## Returns the complex number with poolar coordinates `r` and `phi`.
## Returns the complex number with polar coordinates `r` and `phi`.
result.re = r * cos(phi)
result.im = sin(phi)
result.im = r * sin(phi)
proc `$`*(z: Complex): string =
@@ -438,5 +438,6 @@ when isMainModule:
assert( arccoth(a) =~ arctanh(1/a) )
assert( phase(a) == 1.1071487177940904 )
assert( polar(a) =~ (2.23606797749979, 1.1071487177940904) )
var t = polar(a)
assert( rect(t.r, t.phi) =~ a )
assert( rect(1.0, 2.0) =~ (-0.4161468365471424, 0.9092974268256817) )