what is gsub function in r?
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R gsub. gsub() function replaces all matches of a string, if the parameter is a string vector, returns a string vector of the same length and with the same attributes (after possible coercion to character). Elements of string vectors which are not substituted will be returned unchanged (including any declared encoding) ...
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R - Lists. Advertisements. Lists are the R objects which contain elements of different types like − numbers, strings, vectors and another list inside it. A list can also contain a matrix or a function as its elements. List is created using list() function.
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The ncol R function returns the number of columns of a matrix or data frame. Above, you can find the command for the application of ncol in the R programming language.
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S(errors) = (SQRT(1 minus R-squared)) x STDEV. So, if you know the standard deviation of Y, and you know the correlation between Y and X, you can figure out what the standard deviation of the errors would be be if you regressed Y on X.
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TSV file is tab-separated values file. You can load it into R using read. table() or scan() function, but you should specify a separator parameter as sep = “\t”.
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The usual R svd function always returns a complete set of singular values, even if the number of singular vectors nu or nv is set less than the maximum. The irlba function returns a number of estimated singular values equal to the maximum of the number of specified singular vectors nu and nv.
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Fx or sometimes written F(x) is the function. It is more than likely the cumulative distribution function.
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['Scalar Functions (Returns A Single Value)', 'Inline Table Valued Functions (Contains a single TSQL statement and returns a Table Set)', 'Multi-Statement Table Valued Functions (Contains multiple TSQL statements and returns Table Set)']
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The standard error (SE) is just the standard deviation of the sampling distribution. The variance of the sampling distribution is the variance of the data divided by N and the SE is the square root of that. ... The sd function in R already does one square root (code for sd is in R and revealed by just typing "sd").
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The tidyverse is an opinionated collection of R packages designed for data science. All packages share an underlying philosophy and common APIs. ggplot 2 is an enhanced data visualization package for R.
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R is a programming language and free software environment for statistical computing and graphics supported by the R Foundation for Statistical Computing. The R language is widely used among statisticians and data miners for developing statistical software and data analysis.
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LTrim function and RTrim function : The LTrim function to remove leading spaces and the RTrim function to remove trailing spaces from a string variable. It uses the Trim function to remove both types of spaces.
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lm function provides an R interface to lmder and lmdif from the MINPACK library, for solving nonlinear least-squares problems by a modification of the Levenberg-Marquardt algorithm, with support for lower and upper parameter bounds. ... The implementation can be used via nls-like calls using the nlsLM function.
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The function nrow in R has the form nrow(dataset). This will return the number of rows in the data set. This replaces the need for complicated solutions such as iterating across the elements to count them. Using this example of the mtcars data set, nrow in R shows that this data set has thirty-two rows.
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['RSD = Relative standard deviation.', 'S = Standard deviation.', 'x¯ = Mean of the data.']
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This paper describes the core features of the R package geepack, which implements the generalized estimating equations (GEE) approach for fitting marginal generalized linear models to clustered data. Clustered data arise in many applications such as longitudinal data and repeated measures.
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sigma = gsvd(A,B) returns the vector of generalized singular values, sqrt(diag(C'*C)./diag(S'*S)) . When B is square and nonsingular, the generalized singular values, gsvd(A,B) , correspond to the ordinary singular values, svd(A/B) , but they are sorted in the opposite order. Their reciprocals are gsvd(B,A) .