Computers and Technology, 08.10.2021 03:10 mandy9386
k-means with nonnegative, proportions, or Boolean vectors. Suppose that the vectors x1, . . . , xN are clustered using k-means, with group representatives z1, . . . , zk. (a) Suppose the original vectors xi are nonnegative, i. e., their entries are nonnegative. Explain why the representatives zj are also nonnegative. (b) Suppose the original vectors xi represent proportions, i. e., their entries are nonneg- ative and sum to one. (This is the case when xi are word count histograms, for example.) Explain why the representatives zj also represent proportions, i. e., their entries are nonnegative and sum to one. (c) Suppose the original vectors xi are Boolean, i. e., their entries are either 0 or 1. Give an interpretation of (zj)i, the ith entry of the j group representative.
Answers: 2
Computers and Technology, 22.06.2019 03:30
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The following function returns a string of length n whose characters are all 'x'. give the order of growth (as a function of n) of the running time. recall that concatenating two strings in java takes time proportional to the sum of their lengths. public static string f(int n) { if (n == 0) return ""; if (n == 1) return "x"; return f(n/2) + f(n - n/2); } options: a) constant b) logarithmic c) linear d) linearithmic e)quadratic f)cubic g) exponential
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Computers and Technology, 22.06.2019 19:00
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Computers and Technology, 23.06.2019 15:20
In a game with three frames, where will the objects on layer 1 appear? a. next to the play area b. in the middle of the game c. behind everything else d. in front of everything else
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k-means with nonnegative, proportions, or Boolean vectors. Suppose that the vectors x1, . . . , xN a...
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