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Articles on Trending Technologies
Technical articles with clear explanations and examples
What are the applications of Bipartite graphs?
In a bipartite graph, vertices can be splitted into two disjoint sets so that each edge connected a vertex in one set to a vertex in the multiple set. For the AllElectronics user purchase data, one set of vertices defines users, with one users per vertex. The multiple set defines products, with one product per vertex. An edge links a user to a product, defining the purchase of the product by the user.There are various applications of Bipartite graphs which is as follows −Web search engines − In web search engines, search logs are archived to data user queries and ...
Read MoreReturn an array with the elements of an array left-justified in a string of length width in Numpy
To return an array with the elements of an array left-justified in a string of length width, use the numpy.char.ljust() method in Python Numpy. The "width" parameter is the length of the resulting strings. The function returns an output array of str or unicode, depending on input type.The numpy.char module provides a set of vectorized string operations for arrays of type numpy.str_ or numpy.bytes_.StepsAt first, import the required library −import numpy as npCreate a One-Dimensional array of string −arr = np.array(['Tom', 'John', 'Kate', 'Amy', 'Brad'])Displaying our array −print("Array...", arr)Get the datatype −print("Array datatype...", arr.dtype) Get the dimensions of the Array ...
Read MoreHow can we find subspace clusters from high-dimensional data?
There are several methods have been categorized into three major groups including subspace search techniques, correlation-based clustering techniques, and biclustering techniques.Subspace Search Technique − A subspace search method searches several subspaces for clusters. Therefore, a cluster is a subset of objects that are the same as each other in a subspace. The similarity is acquired by conventional measures including distance or density.For instance, the CLIQUE algorithm is a subspace clustering technique. It can specify the subspaces and the clusters in those subspaces in a dimensionality-increasing series and uses antimonotonicity to prune subspaces in which no cluster can continue. A bigger ...
Read MoreCompare and return True if two string Numpy arrays are not equal
To compare and return True if two string arrays are not equal, use the numpy.char.not_equal() method in Python Numpy. The arr1 and arr2 are the two input string arrays of the same shape.Unlike numpy.not_equal, this comparison is performed by first stripping whitespace characters from the end of the string. This behavior is provided for backward-compatibility with numarray.The numpy.char module provides a set of vectorized string operations for arrays of type numpy.str_ or numpy.bytes_.StepsAt first, import the required library −import numpy as npCreate two One-Dimensional arrays of string −arr1 = np.array(['Bella', 'Tom', 'John', 'Kate', 'Amy', 'Brad']) arr2 = np.array(['Bella', 'Tom', 'Cena', ...
Read MoreWhat is Active Learning?
Active learning is a repetitive type of supervised learning that is relevant for situations where data are sufficient, but the class labels are scarce or costly to acquire. The learning algorithm is active in that it can carefully query a user (e.g., a person oracle) for labels. The multiple tuples used to understand a concept this method is smaller than the number needed in typical supervised learning.It is used to maintain costs down, the active learner objective to achieve high accuracy utilizing as few labeled examples as possible. Let D be all of data under consideration. There are several methods ...
Read MoreWhat is Bayesian Belief Networks?
The naıve Bayesian classifier makes the assumption of class conditional independence, i.e., given the class label of a tuple, the values of the attributes are assumed to be conditionally independent of one another. This simplifies computation.When the assumption influence true, therefore the naïve Bayesian classifier is the efficient in comparison with multiple classifiers. Bayesian belief networks defines joint conditional probability distributions.They enable class conditional independencies to be represented among subsets of variables. They support a graphical structure of causal relationships, on which learning can be implemented. Trained Bayesian belief networks is used for classification. Bayesian belief networks are also called ...
Read MoreReturn a list of the words in the string using separator as the delimiter string in Numpy
To return a list of the words in the string using separator as the delimiter string, use the numpy.char.split() method in Python Numpy −The 1st parameter is the input arrayThe 2nd parameter is the separatorIf maxsplit parameter is given, at most maxsplit splits are done. The function split() returns an array of list objects.The numpy.char module provides a set of vectorized string operations for arrays of type numpy.str_ or numpy.bytes_.StepsAt first, import the required library −import numpy as npCreate an array −arr = np.array(["Bella-Cio", "Brad-Pitt", "Katie-Perry"])Displaying our array −print("Array...", arr)Get the datatype −print("Array datatype...", arr.dtype) Get the dimensions of the ...
Read MoreHow can the data be visualized to support interactive decision tree construction?
Perception-based classification (PBC) is an interactive method based on multidimensional visualization methods and enable the user to incorporate background knowledge about the data when constructing a decision tree.By optically interacting with the data, the user is likely to produce a deeper learning of the data. The resulting trees likely to be smaller than those construct utilizing traditional decision tree induction techniques and therefore are simpler to interpret, while achieving about the similar accuracy.PBC need a pixel-oriented method to consider multidimensional data with its class label data. The circle segments method is adapted, which maps d-dimensional information objects to a circle ...
Read MoreWhat are the Applications of Pattern Mining?
There are various applications of Pattern Mining which are as follows −Pattern mining is generally used for noise filtering and data cleaning as preprocessing in several data-intensive applications. It can be used to explore microarray data, for example, which includes tens of thousands of dimensions (e.g., describing genes).Pattern mining provides in the discovery of inherent mechanisms and clusters hidden in the data. Given the DBLP data set, for example, frequent pattern mining can simply discover interesting clusters like coauthor clusters (by determining authors who generally collaborate) and conference clusters (by determining the sharing of several authors and terms). Such architecture ...
Read MoreReturn a copy of the string with all occurrences of substring old replaced by new in Numpy
To return a copy of the string with all occurrences of substring old replaced by new, use the numpy.char.replace() method in Python Numpy −The 1st parameter is the input arrayThe 2nd parameter is the old string to be replacedThe 3rd parameter is the new string to be replaced with the oldIf the optional parameter count is given, only the first count occurrences are replacedThe numpy.char module provides a set of vectorized string operations for arrays of type numpy.str_ or numpy.bytes_.StepsAt first, import the required library −import numpy as npCreate an array −arr = np.array(["Welcome to the Jungle", "Jungle Safari"])Displaying our ...
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