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Data Set (IBM Mainframe), Sequential Data Set
A data set (or dataset) is a collection of data. In the case of tabular data, a data set corresponds to one or more database tables, where every column of a table represents a particular variable, and each row corresponds to a given record of the data set in question. The data set lists values for each of the variables, such as for example height and weight of an object, for each member of the data set. Data sets can also consist of a collection of documents or files. In the open data discipline, a dataset is a unit used to measure the amount of information released in a public open data repository. The European data.europa.eu portal aggregates more than a million data sets. Properties Several characteristics define a data set's structure and properties. These include the number and types of the attributes or variables, and various statistical measures applicable to them, such as standard deviation and kurtosis. The values may be numbers, such as real numbers or intege ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iris Dataset Scatterplot
Iris most often refers to: *Iris (anatomy), part of the eye *Iris (color), an ambiguous color term *Iris (mythology), a Greek goddess *Iris (plant), ''Iris'' (plant), a genus of flowering plants * Iris (given name), a feminine given name, and a list of people so named Iris or IRIS may also refer to: Arts and media Fictional entities * Iris (American Horror Story), Iris (''American Horror Story''), an ''American Horror Story: Hotel'' character * Iris (Fire Force), Iris (''Fire Force''), a character in the manga series ''Fire Force'' * Iris (Mega Man), Iris (''Mega Man''), a ''Mega Man X4'' character ** Iris, a List of characters in the Mega Man Battle Network series#Iris, ''Mega Man Battle Network'' character * Iris (Pokémon), Iris (''Pokémon'') ** Iris (Pokémon anime), Iris (''Pokémon'' anime) * Sorceress Iris, a ''Magicians of Xanth'' character * Iris, a kaiju character in ''Gamera 3: The Revenge of Iris'' * Iris, a ''LoliRock'' character * Iris, a ''Lufia II: Rise of the S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Missing Values
In statistics, missing data, or missing values, occur when no data value is stored for the variable in an observation. Missing data are a common occurrence and can have a significant effect on the conclusions that can be drawn from the data. Missing data can occur because of nonresponse: no information is provided for one or more items or for a whole unit ("subject"). Some items are more likely to generate a nonresponse than others: for example items about private subjects such as income. Attrition is a type of missingness that can occur in longitudinal studies—for instance studying development where a measurement is repeated after a certain period of time. Missingness occurs when participants drop out before the test ends and one or more measurements are missing. Data often are missing in research in economics, sociology, and political science because governments or private entities choose not to, or fail to, report critical statistics, or because the information is not avai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Image Processing
Digital image processing is the use of a digital computer to process digital images through an algorithm. As a subcategory or field of digital signal processing, digital image processing has many advantages over analog image processing. It allows a much wider range of algorithms to be applied to the input data and can avoid problems such as the build-up of Noise (signal processing), noise and distortion during processing. Since images are defined over two dimensions (perhaps more), digital image processing may be modeled in the form of Multidimensional system, multidimensional systems. The generation and development of digital image processing are mainly affected by three factors: first, the development of computers; second, the development of mathematics (especially the creation and improvement of discrete mathematics, discrete mathematics theory); and third, the demand for a wide range of applications in environment, agriculture, military, industry and medical science has incre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MNIST Database
The MNIST database (''Modified National Institute of Standards and Technology database'') is a large database of handwritten digits that is commonly used for training various image processing systems. The database is also widely used for training and testing in the field of machine learning. It was created by "re-mixing" the samples from NIST's original datasets. The creators felt that since NIST's training dataset was taken from American Census Bureau employees, while the testing dataset was taken from American high school students, it was not well-suited for machine learning experiments. Furthermore, the black and white images from NIST were normalized to fit into a 28x28 pixel bounding box and anti-aliased, which introduced grayscale levels. The MNIST database contains 60,000 training images and 10,000 testing images. Half of the training set and half of the test set were taken from NIST's training dataset, while the other half of the training set and the other half of the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annals Of Eugenics
The ''Annals of Human Genetics'' is a bimonthly peer-reviewed scientific journal covering human genetics. It was established in 1925 by Karl Pearson as the ''Annals of Eugenics'', with as subtitle, Darwin's epigram "I have no Faith in anything short of actual measurement and the rule of three". The journal obtained its current name in 1954 to reflect changing perceptions on eugenics. History Annals of Eugenics Pearson edited the journal from 1925 to 1933. In a brief valedictory letter published at the time of his resignation, Pearson wrote that he had fallen short of his aspirations, having published only five volumes over eight years due to the limited financial resources of the Galton Laboratory. He reaffirmed his belief that eugenics was worthy as a subject of academic study and as a source of public policy, but warned against hastily adopting eugenic legislation, noting that the field contained too many theories weakly supported by anecdote or opinion. Ronald Fisher took ov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ronald Fisher
Sir Ronald Aylmer Fisher (17 February 1890 – 29 July 1962) was a British polymath who was active as a mathematician, statistician, biologist, geneticist, and academic. For his work in statistics, he has been described as "a genius who almost single-handedly created the foundations for modern statistical science" and "the single most important figure in 20th century statistics". In genetics, Fisher was the one to most comprehensively combine the ideas of Gregor Mendel and Charles Darwin, as his work used mathematics to combine Mendelian genetics and natural selection; this contributed to the revival of Darwinism in the early 20th-century revision of the theory of evolution known as the Modern synthesis (20th century), modern synthesis. For his contributions to biology, Richard Dawkins declared Fisher to be the greatest of Darwin's successors. He is also considered one of the founding fathers of Neo-Darwinism. According to statistician Jeffrey T. Leek, Fisher is the most in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iris Flower Data Set
The ''Iris'' flower data set or Fisher's ''Iris'' data set is a Multivariate statistics, multivariate data set used and made famous by the British statistician and biologist Ronald Fisher in his 1936 paper ''The use of multiple measurements in taxonomic problems'' as an example of linear discriminant analysis. It is sometimes called Anderson's ''Iris'' data set because Edgar Anderson collected the data to quantify the morphology (biology), morphologic variation of ''Iris (plant), Iris'' flowers of three related species. Two of the three species were collected in the Gaspé Peninsula "all from the same pasture, and picked on the same day and measured at the same time by the same person with the same apparatus". The data set consists of 50 samples from each of three species of ''Iris'' (''Iris setosa'', ''Iris virginica'' and ''Iris versicolor''). Four Features (pattern recognition), features were measured from each sample: the length and the width of the sepals and petals, in centi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
