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--- other:python:misc_by_jyp [2022/02/21 12:52]
jypeter Added numpy section
+++ other:python:misc_by_jyp [2022/02/21 14:47]
jypeter [numpy related stuff] Added np.unique example
@@ Line 223: / Line 223: @@
 ==== numpy related stuff ====
+=== Finding and counting unique values ===
+Use ''np.unique'', do **not** try to use histogram related functions!
+<code>>>> vals = np.random.randint(2, 5, (10,)) * 0.5 # Get 10 discreet float values
+>>> vals
+array([1. , 2. , 1. , 2. , 2. , 1.5, 1. , 1.5, 2. , 1.5])
+>>> np.unique(vals)
+array([1. , 1.5, 2. ])
+>>> np.unique(vals, return_counts=True)
+(array([1. , 1.5, 2. ]), array([3, 3, 4]))
+>>> np.sort(vals) # Sorted copy, in order to check the result
+array([1. , 1. , 1. , 1.5, 1.5, 1.5, 2. , 2. , 2. , 2. ])</code>

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