formatCurrency {DT}

Format table columns

Description

Format numeric columns in a table as currency (formatCurrency()) or percentages (formatPercentage()), or round numbers to a specified number of decimal places (formatRound()), or a specified number of significant figures (formatSignif()). The function formatStyle() applies CSS styles to table cells by column.

Usage

formatCurrency(
  table,
  columns,
  currency = "$",
  interval = 3,
  mark = ",",
  digits = 2,
  dec.mark = getOption("OutDec"),
  before = TRUE,
  zero.print = NULL,
  rows = NULL
)

formatString(table, columns, prefix = "", suffix = "", rows = NULL)

formatPercentage(
  table,
  columns,
  digits = 0,
  interval = 3,
  mark = ",",
  dec.mark = getOption("OutDec"),
  zero.print = NULL,
  rows = NULL
)

formatRound(
  table,
  columns,
  digits = 2,
  interval = 3,
  mark = ",",
  dec.mark = getOption("OutDec"),
  zero.print = NULL,
  rows = NULL
)

formatSignif(
  table,
  columns,
  digits = 2,
  interval = 3,
  mark = ",",
  dec.mark = getOption("OutDec"),
  zero.print = NULL,
  rows = NULL
)

formatDate(table, columns, method = "toDateString", params = NULL, rows = NULL)

formatStyle(
  table,
  columns,
  valueColumns = columns,
  target = c("cell", "row"),
  fontWeight = NULL,
  color = NULL,
  backgroundColor = NULL,
  background = NULL,
  ...
)

Arguments

table

a table object created from datatable()

columns

the indices of the columns to be formatted (can be character, numeric, logical, or a formula of the form ~ V1 + V2, which is equivalent to c('V1', 'V2'))

currency

the currency symbol

interval

put a marker after how many digits of the numbers

mark

the marker after every interval decimals in the numbers

digits

the number of decimal places to round to

dec.mark

a character to indicate the decimal point

before

whether to place the currency symbol before or after the values

zero.print

a string to specify how zeros should be formatted. Useful for when many zero values exist. If NULL, keeps zero as it is.

rows

an integer vector (starting from 1) to specify the only rows that the style applies to. By default, it's NULL, meaning all rows should be formatted. Note, formatStyle() doesn't support this argument and you should use styleRow() instead. In addition, this only works expected in the client-side processing mode, i.e., server = FALSE.

prefix

string to put in front of the column values

suffix

string to put after the column values

method

the method(s) to convert a date to string in JavaScript; see DT:::DateMethods for a list of possible methods, and https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date for a full reference

params

a list parameters for the specific date conversion method, e.g., for the toLocaleDateString() method, your browser may support params = list('ko-KR', list(year = 'numeric', month = 'long', day = 'numeric'))

valueColumns

indices of the columns from which the cell values are obtained; this can be different with the columns argument, e.g. you may style one column based on the values of a different column

target

the target to apply the CSS styles to (the current cell or the full row)

fontWeight

the font weight, e.g. 'bold' and 'normal'

color

the font color, e.g. 'red' and '#ee00aa'

backgroundColor

the background color of table cells

background

the background of table cells

...

other CSS properties, e.g. 'border', 'font-size', 'text-align', and so on; if you want to condition CSS styles on the cell values, you may use the helper functions such as styleInterval(); note the actual CSS property names are dash-separated, but you can use camelCase names in this function (otherwise you will have to use backticks to quote the names, e.g. `font-size` = '12px'), and this function will automatically convert camelCase names to dash-separated names (e.g. 'fontWeight' will be converted to 'font-weight' internally)

Note

The length of arguments other than table should be 1 or the same as the length of columns.

References

See https://rstudio.github.io/DT/functions.html for detailed documentation and examples.

Examples

library(DT)
m = cbind(matrix(rnorm(120, 1e5, 1e6), 40), runif(40), rnorm(40, 100))
colnames(m) = head(LETTERS, ncol(m))
m

# format the columns A and C as currency, and D as percentages
datatable(m) %>% formatCurrency(c('A', 'C')) %>% formatPercentage('D', 2)

# the first two columns are Euro currency, and round column E to 3 decimal places
datatable(m) %>% formatCurrency(1:2, '\U20AC') %>% formatRound('E', 3)

# render vapor pressure with only two significant figures.
datatable(pressure) %>% formatSignif('pressure',2)

# apply CSS styles to columns
datatable(iris) %>%
  formatStyle('Sepal.Length', fontWeight = styleInterval(5, c('bold', 'weight'))) %>%
  formatStyle('Sepal.Width',
    color = styleInterval(3.4, c('red', 'white')),
    backgroundColor = styleInterval(3.4, c('yellow', 'gray'))
  )