**r Get column and row names of matrix indices in a vector**

There are many situations in R where you have a list of vectors that you need to convert to a data.frame. This question has been addressed over at StackOverflow and it turns out there are many different approaches to completing this task. Since I encounter this situation relatively frequently, I... If arr.ind == TRUE and x is an array (has a dim attribute), the result is arrayInd(which(x), dim(x), dimnames(x)), namely a matrix whose rows each are the indices of one element of …

**data.matrix function R Documentation**

When coercing a vector, it produces a one-column matrix, and promotes the names (if any) of the vector to the rownames of the matrix. is.matrix is a primitive function. The print method for a matrix gives a rectangular layout with dimnames or indices.... > row.names is a function that takes a data.frame as an argument. So how > about > > > row.names(data) > > ? > > As an aside, 'data' is not the best choice for a variable name in R, > since there is a function called 'data' that will get overridden if you > do this

**R Matrix Transpose ETH Z**

There are many situations in R where you have a list of vectors that you need to convert to a data.frame. This question has been addressed over at StackOverflow and it turns out there are many different approaches to completing this task. Since I encounter this situation relatively frequently, I bf1 how to get puzzle pieces From: David Winsemius

**How To Fill Matrix In R Using Row And Column Names**

The rbind() function in R conveniently adds the names of the vectors to the rows of the matrix. You name the values in a vector, and you can do something very similar with rows and columns in a matrix. how to find the rank of a matrix c sharp To change the names that appear, you can easily continue using the names() function. Make sure, though, that you have a number of arguments in the c() function that is equal to the number of variables that you have included into writers_df .

## How long can it take?

### R help Extracting "row.names" - Nabble

- [R] how to get row name of matrix when result is a vector
- R Matrix Multiplication
- R model.matrix column names for factors Stack Overflow
- How To Fill Matrix In R Using Row And Column Names

## How To Get Names Of A Matrix In R

Since a data frame is a list, you can get at the column names with the names() function; since it's a matrix, you can also get at them with the dimnames() function we used above. In general (as here) the rows of a data frame will contain incompatible data (numbers, characters, and so on).

- matrix converts a vector into a matrix with a specified number of rows and columns. rbind stacks several vectors as rows one on top of another to form a matrix, or it can stack smaller matrices on top of each other to form a larger matrix.
- If arr.ind == TRUE and x is an array (has a dim attribute), the result is arrayInd(which(x), dim(x), dimnames(x)), namely a matrix whose rows each are the indices of one element of …
- rownames and row.names return the same values for data frame and matrices; the only difference that I have spotted is that where there aren't any names, rownames will print "NULL" (as does colnames), but row.names returns it invisibly.
- matrix converts a vector into a matrix with a specified number of rows and columns. rbind stacks several vectors as rows one on top of another to form a matrix, or it can stack smaller matrices on top of each other to form a larger matrix.