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Question: What am I missing in using numboccur?

Question:What am I missing in using numboccur?

Ali Guzel 70 Maple 2021
statistics numoccur
November 07 2021
1

restart; p := .5; n := 10; nseq := 2; with(Statistics); randomize(); x1 := seq(Sample(RandomVariable(BernoulliDistribution(p)), n), i = 1 .. nseq); x2 := seq(convert(x1[i], list), i = 1 .. nseq)

[HFloat(0.0), HFloat(1.0), HFloat(0.0), HFloat(0.0), HFloat(0.0), HFloat(1.0), HFloat(0.0), HFloat(0.0), HFloat(0.0), HFloat(1.0)], [HFloat(0.0), HFloat(1.0), HFloat(1.0), HFloat(1.0), HFloat(0.0), HFloat(0.0), HFloat(1.0), HFloat(0.0), HFloat(0.0), HFloat(0.0)]

 (1)

x2[1]

[HFloat(0.0), HFloat(1.0), HFloat(0.0), HFloat(0.0), HFloat(0.0), HFloat(1.0), HFloat(0.0), HFloat(0.0), HFloat(0.0), HFloat(1.0)]

 (2)

whattype(x2[1])

list

 (3)

numboccur(x2[1], {0.})

0

 (4)

NULL

But, when I plugged the list at (2) it works...  

numboccur([0., 0., 1., 1., 0., 0., 1., 0., 0., 0.], 0.)

7

 (5)

``

NULL

NULL

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