broom (version 0.4.3)

rcorr_tidiers: Tidying methods for rcorr objects

Description

Tidies a correlation matrix from the rcorr function in the "Hmisc" package, including correlation estimates, p-values, and the number of observations in each pairwise correlation. Note that it returns these in "long", or "melted", format, with one row for each pair of columns being compared.

Usage

# S3 method for rcorr
tidy(x, diagonal = FALSE, ...)

Arguments

x

An object of class "rcorr"

diagonal

Whether to include diagonal elements (where estimate is 1 and p.value is NA), default FALSE

...

extra arguments (not used)

Value

A data.frame with one row for each pairing in the correlation matrix. Columns are:

column1

Name or index of the first column being described

column2

Name or index of the second column being described

estimate

Estimate of Pearson's r or Spearman's rho

n

Number of observations used to compute the correlation

p.value

P-value of correlation

Details

Only half the symmetric matrix is shown.

Examples

# NOT RUN {
if (require("Hmisc", quietly = TRUE)) {
    mat <- replicate(52, rnorm(100))
    # add some NAs
    mat[sample(length(mat), 2000)] <- NA
    # also column names
    colnames(mat) <- c(LETTERS, letters)
    
    rc <- rcorr(mat)
    
    td <- tidy(rc)
    head(td)
    
    library(ggplot2)
    ggplot(td, aes(p.value)) +
        geom_histogram(binwidth = .1)
 
    ggplot(td, aes(estimate, p.value)) +
        geom_point() +
        scale_y_log10()
}

# }