medpy.metric.histogram.cosine_1¶
-
medpy.metric.histogram.
cosine_1
(h1, h2)[source]¶ Cosine simmilarity.
Turns the cosine similarity into a distance measure for normalized, positive histograms.
\[d_{\bar{\cos}}(H, H') = 1 - d_{\cos}(H, H')\]See
cosine
for the definition of \(d_{\cos}(H, H')\).Attributes:
- metric
Attributes for normalized histograms:
- \(d(H, H')\in[0, 1]\)
- \(d(H, H) = 0\)
- \(d(H, H') = d(H', H)\)
Attributes for not-normalized histograms:
- not applicable
Attributes for not-equal histograms:
- not applicable
Parameters: h1 : sequence
The first histogram, normalized.
h2 : sequence
The second histogram, normalized, same bins as
h1
.Returns: cosine : float
Cosine distance.