R: Pearson Correlation for Sparse Matrices

dtm_cor {udpipe} | R Documentation

## Pearson Correlation for Sparse Matrices

### Description

Pearson Correlation for Sparse Matrices. More memory and time-efficient than `cor(as.matrix(x))`.

### Usage

    dtm_cor(x)

### Arguments

`x` | A matrix, potentially a sparse matrix such as a "dgCMatrix" object which is returned by `document_term_matrix`

### Value

a correlation matrix

### See Also

`document_term_matrix`

### Examples

    x <- data.frame(
     doc_id = c(1, 1, 2, 3, 4),
     term = c("A", "C", "Z", "X", "G"),
     freq = c(1, 5, 7, 10, 0))
    dtm <- document_term_matrix(x)
    dtm_cor(dtm)

[Package udpipe version 0.8.8 Index]