Instance variables are shared by all other objects of the same class.
Answer the following statement true (T) or false (F)
False
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Which of the following returns the fourth character in the string variable named str and checks if there is a fourth character in the string?
a. str(3); b. str.at(3); c. str[3]; d. All of the above
For each of the following types of data or clusters, discuss briefly if (1) sam- pling will cause problems for this approach and (2) what those problems are. Assume that the sampling technique randomly chooses points from the to- tal set of m points and that any unmentioned characteristics of the data or clusters are as optimal as possible. In other words, focus only on problems caused by the particular characteristic mentioned. Finally, assume that K is very much less than m.
Hierarchical clustering algorithms require O(m2 log(m)) time, and conse- quently, are impractical to use directly on larger data sets. One possible technique for reducing the time required is to sample the data set. For ex- ample, if K clusters are desired and ?m points are sampled from the m points, then a hierarchical clustering algorithm will produce a hierarchical clustering in roughly O(m) time. K clusters can be extracted from this hier- archical clustering by taking the clusters on the Kth level of the dendrogram. The remaining points can then be assigned to a cluster in linear time, by using various strategies. To give a specific example, the centroids of the K clusters can be computed, and then each of the m ? ?m remaining points can be assigned to the cluster associated with the closest centroid. (a) Data with very different sized clusters. (b) High-dimensional data. (c) Data with outliers, i.e., atypical points. (d) Data with highly irregular regions. (e) Data with globular clusters. (f) Data with widely different densities. (g) Data with a small percentage of noise points. (h) Non-Euclidean data. (i) Euclidean data. (j) Data with many and mixed attribute types.
One thing you should always try to include in a Search feature is:
a. Fancy wording b. Instructions c. The word “search” or a search icon (magnifying glass) d. Options for limiting the scope of the search
?Case 3-2 Application software (apps) includes all the programs that allow you to perform specific tasks or applications on a computer. Individuals and businesses use software to write letters, keep track of finances, participate in videoconferences, watch videos, make business presentations, process orders, access Web-based resources, and many other tasks. In the following questions, identify the tasks of different application software. Michelle wants an application program that can use formulas to perform calculations and organize numbers and values into rows and columns. Identify the application program that Michelle should choose.
A. ?Word processing program B. ?Spreadsheet program C. ?Presentation software D. ?Note taking software