matrix apply r
You simply use the apply() function: R> M <- matrix(1:6, nrow=3, byrow=TRUE) R> M [,1] [,2] [1,] 1 2 [2,] 3 4 [3,] 5 6 R> apply(M, 1, function(x) 2*x[1]+x[2]) [1] 4 10 ... , With base R you can do it in one line: cbind(apply(m, 1, mean), apply(m, 1, min)) # [,1] [,2] #[1,] 13.287748 5.2172657 #[2,] 5.855862 1.8346868 ...,X. an array, including a matrix. MARGIN. a vector giving the subscripts which the function will be applied over. E.g., for a matrix 1 indicates rows, 2 indicates ... , , The apply() family pertains to the R base package and is populated with functions to manipulate slices of data from matrices, arrays, lists and ...,From ?apply : MARGIN: a vector giving the subscripts which the function will be applied over. E.g., for a matrix '1' indicates rows, '2' indicates columns, 'c(1, ... , @Joshua Ulrich (and Dason) has a great answer. And doing it directly without the function y is the best solution. But if you really need to call a ...,Logical operation & is equivalent to binary multiplication. So you can simplify your condition to columnwise multiplication and then calculating sums. , [R] How to apply a function on each column of a matrix ... this website: >> http://www.ats.ucla.edu/stat/r/library/advanced_function_r.htm#lapply ...
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 matrix apply r 相關參考資料
Apply a function to every row of a matrix or a data frame - Stack ...
You simply use the apply() function: R> M <- matrix(1:6, nrow=3, byrow=TRUE) R> M [,1] [,2] [1,] 1 2 [2,] 3 4 [3,] 5 6 R> apply(M, 1, function(x) 2*x[1]+x[2]) [1] 4 10 ... https://stackoverflow.com Apply a list of functions to matrix and return a matrix as a result ...
With base R you can do it in one line: cbind(apply(m, 1, mean), apply(m, 1, min)) # [,1] [,2] #[1,] 13.287748 5.2172657 #[2,] 5.855862 1.8346868 ... https://stackoverflow.com Apply Functions Over Array Margins - R
X. an array, including a matrix. MARGIN. a vector giving the subscripts which the function will be applied over. E.g., for a matrix 1 indicates rows, 2 indicates ... https://stat.ethz.ch Matrix Function in R - Master the apply() and sapply ...
https://data-flair.training R tutorial on the Apply family of functions (article) - DataCamp
The apply() family pertains to the R base package and is populated with functions to manipulate slices of data from matrices, arrays, lists and ... https://www.datacamp.com R: apply on all matrix elements - Stack Overflow
From ?apply : MARGIN: a vector giving the subscripts which the function will be applied over. E.g., for a matrix '1' indicates rows, '2' indicates columns, 'c(1, ... https://stackoverflow.com R: applying function over matrix and keeping matrix dimensions ...
@Joshua Ulrich (and Dason) has a great answer. And doing it directly without the function y is the best solution. But if you really need to call a ... https://stackoverflow.com Using apply function on a matrix in R - Stack Overflow
Logical operation & is equivalent to binary multiplication. So you can simplify your condition to columnwise multiplication and then calculating sums. https://stackoverflow.com [R] How to apply a function on each column of a matrix
[R] How to apply a function on each column of a matrix ... this website: >> http://www.ats.ucla.edu/stat/r/library/advanced_function_r.htm#lapply ... https://stat.ethz.ch |