Generate Summary Tables of Mean Comparisons for Statistical Reports (Survey Data)

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Description

This function compares the mean of a continuous variable across levels of a categorical variable and summarizes the results in a clean table for a statistical report. Similar to tabmeans, but for survey data. Relies heavily on the 'survey' package [1, 2].

Usage

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tabmeans.svy(x, y, svy, latex = FALSE, xlevels = NULL, yname = "Y variable", 
             test = "Wald", decimals = 1, p.decimals = c(2, 3), p.cuts = 0.01, 
             p.lowerbound = 0.001, p.leading0 = TRUE, p.avoid1 = FALSE, n.column = FALSE,
             n.headings = TRUE, bold.colnames = TRUE, bold.varnames = FALSE, 
             variable.colname = "Variable", print.html = FALSE, 
             html.filename = "table1.html")

Arguments

svy

Survey design object created by a call to svydesign [1, 2].

x

Character string specifying categorical x variable name. Must match one of names(svy$variables).

y

Character string specifying continuous y variable name. Must match one of names(svy$variables).

latex

If TRUE, object returned is formatted for printing in LaTeX using xtable [3]; if FALSE, formatted for copy-and-pasting from RStudio into a word processor.

xlevels

Optional character vector to label the levels of x. If unspecified, the function uses the values that x takes on.

yname

Optional label for the continuous variable.

test

Either "Wald" for Wald test or "LRT" for likelihood ratio test to test for equivalent mean y across levels of x.

decimals

Number of decimal places for means and standard deviations or standard errors.

p.decimals

Number of decimal places for p-values. If a vector is provided rather than a single value, number of decimal places will depend on what range the p-value lies in. See p.cuts.

p.cuts

Cut-point(s) to control number of decimal places used for p-values. For example, by default p.cuts is 0.1 and p.decimals is c(2, 3). This means that p-values in the range [0.1, 1] will be printed to two decimal places, while p-values in the range [0, 0.1) will be printed to three decimal places.

p.lowerbound

Controls cut-point at which p-values are no longer printed as their value, but rather <lowerbound. For example, by default p.lowerbound is 0.001. Under this setting, p-values less than 0.001 are printed as <0.001.

p.leading0

If TRUE, p-values are printed with 0 before decimal place; if FALSE, the leading 0 is omitted.

p.avoid1

If TRUE, p-values rounded to 1 are not printed as 1, but as >0.99 (or similarly depending on values for p.decimals and p.cuts).

n.column

If TRUE, the table will have a column for (unweighted) sample size.

n.headings

If TRUE, the table will indicate the (unweighted) sample size overall and in each group in parentheses after the column headings.

bold.colnames

If TRUE, column headings are printed in bold font. Only applies if latex = TRUE.

bold.varnames

If TRUE, variable name in the first column of the table is printed in bold font. Only applies if latex = TRUE.

variable.colname

Character string with desired heading for first column of table, which shows the y variable name.

print.html

If TRUE, function prints a .html file to the current working directory.

html.filename

Character string indicating the name of the .html file that gets printed if print.html is set to TRUE.

Details

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Value

A character matrix with the requested table comparing mean y across levels of x. If latex is set to TRUE, the character matrix will be formatted for inserting into a Markdown/Sweave/knitr report using the xtable package [3].

Note

If you wish to paste your tables into Word, you can use either of these approaches:

1. Use the write.cb function in the Kmisc package [4]. If your table is stored in a character matrix named table1, use write.cb(table1) to copy the table to your clipboard. Paste the result into Word, then highlight the text and go to Insert - Table - Convert Text to Table... OK.

2. Set the print.html input to TRUE. This will result in a .html file writing to your current working directory. When you open this file, you will see a nice looking table that you can copy and paste into Word. You can control the name of this file with the html.filename input.

If you wish to use LaTeX, R Markdown, knitr, Sweave, etc., please see the package vignette for examples. In most cases, you have to set the latex input to TRUE and then use the xtable package [1].

If you have suggestions for additional options or features, or if you would like some help using any function in the package tab, please e-mail me at vandomed@gmail.com. Thanks!

Author(s)

Dane R. Van Domelen

References

1. Lumley T (2012). survey: analysis of complex survey samples. R package version 3.28-2, https://cran.r-project.org/package=survey.

2. Lumley T (2014). Analysis of complex survey samples. Journal of Statistical Software 9(1): 1-19.

3. Dahl DB (2013). xtable: Export tables to LaTeX or HTML. R package version 1.7-1, https://cran.r-project.org/package=xtable.

4. Kevin Ushey (2013). Kmisc: Kevin Miscellaneous. R package version 0.5.0. https://CRAN.R-project.org/package=Kmisc.

Acknowledgment: This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-0940903.

See Also

svydesign, svyglm, tabfreq, tabmeans, tabmedians, tabmulti, tabglm, tabcox, tabgee, tabfreq.svy, tabmedians.svy, tabmulti.svy, tabglm.svy

Examples

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