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Articles on Trending Technologies
Technical articles with clear explanations and examples
What is the basic method of attribute subset selection?
Attribute subset selection decreases the data set size by eliminating irrelevant or redundant attributes (or dimensions). Attribute subset selection aims to discover a minimum set of attributes such that the resulting probability distribution of the data classes is as close as applicable to the original distribution accessing using all attributes. Data mining on a reduced set of attributes has an extra benefit. It reduces the multiple attributes occurring in the discovered patterns, provides to create the patterns simpler to understand.For n attributes, there are 2n possible subsets. An exhaustive search for the optimal subset of attributes can be intensely expensive, ...
Read MoreWhat is Data Reduction?
Data mining is applied to the selected data in a large amount database. When data analysis and mining is done on a huge amount of data then it takes a very long time to process, which makes it impractical and infeasible. It can reduce the processing time for data analysis, data reduction techniques are used to obtain a reduced representation of the dataset that is much smaller in volume by maintaining the integrity of the original data. By reducing the data, the efficiency of the data mining process is improved which produces the same analytical results.Data reduction aims to define ...
Read MoreWhat is Data Transformation?
In data transformation, the data are transformed or combined into forms suitable for mining. Data transformation can involve the following −Smoothing − It can work to remove noise from the data. Such methods contain binning, regression, and clustering.Aggregation − In aggregation, where summary or aggregation operations are applied to the data. For example, the daily sales data may be aggregated to compute monthly and annual total amounts. This phase is generally used in making a data cube for the analysis of the data at multiple granularities.Generalization − In Generalization, where low-level or “primitive” (raw) data are restored by larger-level concepts ...
Read MoreWhat is a Pytest framework?
Pytest is a test framework in python. To install pytest, we need to use the command pip install pytest. After installation, we can verify if python has been installed by the command pytest –version. The version of pytest shall be known.Pytest can be used for creating and executing test cases. It can be used in a wide range of testing API, UI, database, and so on. The test file of pytest has a naming convention that it starts with test_ or ends with _test keyword and every line of code should be inside a method that should have a name ...
Read MoreWhat is Data Cleaning?
Data cleaning defines to clean the data by filling in the missing values, smoothing noisy data, analyzing and removing outliers, and removing inconsistencies in the data. Sometimes data at multiple levels of detail can be different from what is required, for example, it can need the age ranges of 20-30, 30-40, 40-50, and the imported data includes birth date. The data can be cleans by splitting the data into appropriate types.Types of data cleaningThere are various types of data cleaning which are as follows −Missing Values − Missing values are filled with appropriate values. There are the following approaches to ...
Read MoreWhat are some of the rules of creating a CSS expression?
There are some rules for creating a CSS expression. The CSS is one of the important locators in Selenium. A customized CSS can be developed with the help of attributes like id, class name, and by the combination of tagname and html attributes.The ways of creating a CSS are listed below −Using a class name html attribute.This will select the web element of that particular class represented by (.)classname.Syntax− driver. find_element_by_css_selector(".name")Here name is the value of the attribute class.Using an id html attribute.This will select the web element of that particular id represented by (#) id.Syntax− driver. find_element_by_css_selector("#search")Here search is ...
Read MoreWhat is the motivation behind data mining?
Data mining is the procedure of finding useful new correlations, patterns, and trends by sharing through a high amount of data saved in repositories, using pattern recognition technologies including statistical and mathematical techniques. It is the analysis of factual datasets to discover unsuspected relationships and to summarize the records in novel methods that are both logical and helpful to the data owner.It is the procedure of selection, exploration, and modeling of high quantities of information to find regularities or relations that are at first unknown to obtain clear and beneficial results for the owner of the database.It is not limited ...
Read MoreHow to use regular expressions in a CSS locator?
We can use regular expressions in a CSS locator. We can identify elements by matching their attributes partially with the help of regular expressions. In CSS, there are multiple methods to achieve this. They are listed below −Using the wild character *. This means the string contains our given text.Syntax− driver.find_element_by_css_selector("input[name*='sel']")It will search the input tag which contains the 'name' attribute containing 'sel' text.Using the wild character ^. This means the string starts with our given text.Syntax− driver.find_element_by_css_selector("input[name^='Tut']")It will search the input tag which contains the 'name' attribute starting with 'Tut' text.Using the wild character $. This means the string ...
Read MoreWhat Kinds of data can be mined?
Data mining defines extracting or mining knowledge from huge amounts of data. Data mining is generally used in places where a huge amount of data is saved and processed. For example, the banking system uses data mining to save huge amounts of data which is processed constantly.In Data mining, hidden patterns of data are considering according to the multiple categories into a piece of useful data. This data is assembled in an area including data warehouses for analyzing it, and data mining algorithms are performed. This data facilitates in creating effective decisions which cut value and increase revenue.There are various ...
Read MoreHow to implement tags in Cypress?
We can implement tags in Cypress. Cypress has tags - .only and .skip. While the .only tag is utilized to execute the it block to which it is tagged, the .skip tag is utilized to exclude the it block to which it is tagged.ExampleImplementation with .onlydescribe('Tutorialspoint', function() //it block with tag .only it.only('First Test', function() { cy.log("First Test") }) //it block with tag .only It.only('Second Test', function() { cy.log("Second Test") }) it('Third Test', function() { cy.log("Third Test") }) })Execution ResultsThe output ...
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