How To Get Row Number In Vector R

how to get row number in vector r

R help how to find a row index in a matrix or a data frame

unique returns a vector, data frame or array like x but with duplicate elements/rows removed. logical indicating if duplication should be considered from the last, i.e., the last (or rightmost) of identical elements will be kept. This only matters for names or dimnames. This is a generic function



how to get row number in vector r

Vector Arithmetics R Tutorial

Description. Foreach entry of haystack, grep searches if at least a string in needle which matches a substring. The haystack entries index where at least a match has been found are returned in the row …

how to get row number in vector r

Count and display number of rows and col C++ Forum

Introduction Dataframes in R have both column names and row names. Column names, which are used frequently, give the dataframes in R their characteristic distinction. Row names, on the other hand, are rarely used. Usually, row names appear to be the same as row numbers but this is not the case. This quick blog post demonstrates that row names are not the same as row numbers. This is something



how to get row number in vector r

[R] how do I find the row index number or row name of a

Re: Remove a number from a vector Better yet, remove the which altogether, and it'll run a slight bit faster and maybe look a little neater. x <- x[x!="bobo"]

How to get row number in vector r
R Vectors and Why they Matter R for Excel Users
how to get row number in vector r

Count and display number of rows and col C++ Forum

We retrieve values in a vector by declaring an index inside a single square bracket "[]" operator. For example, the following shows how to retrieve a vector member. Since the vector index is 1-based, we use the index position 3 for retrieving the third member. If the index is negative, it would

how to get row number in vector r

cellFrom Get cell row or column number in raster

Dear all, this looks pretty much a standard problem, but I couldn't find a satisfying and understandable solution. (A) Given a data frame (or matrix), e.g. x <- data.frame(A=c(1, 2, 2), B=c(4, 5, 5)) and a row of this data frame, e.g. r <- c(2, 5) I need to find one row index i (or all such indices) such that r is

how to get row number in vector r

R help count appearence of zero in a vector - Nabble

Description. Foreach entry of haystack, grep searches if at least a string in needle which matches a substring. The haystack entries index where at least a match has been found are returned in the row …

how to get row number in vector r

2. Basic Data Types — R Tutorial cyclismo.org

20/04/2016 · Hi all, I am trying the output the number of rows and columns of a matrix text file. For example, if the matrix text file is 2 10 5-7 8 9 in its terminal console, it will output as it is from the file it read and also output the number of rows and column.

how to get row number in vector r

Vector Arithmetics R Tutorial

Get cell number(s) of a Raster* object from row and/or column numbers. Cell numbers start at 1 in the upper left corner, and increase from left to right, and then from top to bottom. The last cell number equals the number of cells of the Raster* object.

how to get row number in vector r

How to get row index of certain values in a vector

Each time R loops through the code, R assigns the next value in the vector with values to the identifier. Calculate values in a for loop Let’s take another look at the priceCalculator() function.

how to get row number in vector r

R help archive Re [R] get index of elements in vector

4/12/2015 · Likewise, to select the number 1, at row 3 and column 2, we write the following line: Works like a charm! Notice that the results are single values, so vectors of length 1.

how to get row number in vector r

R help how to find a row index in a matrix or a data frame

4/12/2015 · R sees that the input vector has length 6 and that there have to be two rows. It then infers that you'll probably want 3 columns, such that the number of matrix elements matches the number of

how to get row number in vector r

R help how to find a row index in a matrix or a data frame

Return row number(s) for a particular value in a column in a dataframe. Ask Question 29. 7. I have a data frame (df Browse other questions tagged r numbers dataframe row or ask your own question. asked. 4 years, 11 months ago. viewed . 121,451 times

How to get row number in vector r - R help archive Re [R] get index of elements in vector

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