Add bisection tests

JuliaIntervals · Feb 19, 2017 · 2770e21 · 2770e21
1 parent ef67920
commit 2770e21
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diff --git a/src/root_finding/bisect.jl b/src/root_finding/bisect.jl
@@ -6,7 +6,7 @@ Split the interval `X` at position α; α=0.5 corresponds to the midpoint.
 Returns a tuple of the new intervals.
 """
 function bisect(X::Interval, α=0.5)
-    m = α * X.lo + (1-α) * X.hi
+    m = (1-α) * X.lo + α * X.hi
     return ( Interval(X.lo, m), Interval(m, X.hi) )
 end
 

diff --git a/src/root_finding/root_finding.jl b/src/root_finding/root_finding.jl
@@ -11,7 +11,8 @@ export
     derivative, jacobian,  # reexport derivative from ForwardDiff
     Root, is_unique,
     find_roots,
-    find_roots_midpoint
+    find_roots_midpoint,
+    bisect
 
 import Base: ⊆