# gt 0.3.0 2021-05-12

This release focuses on improvements to two main areas:

1. Better RTF output support:
• RTF table generation is now fit for use following an extensive rewrite of internal RTF rendering functions.
• RTF table output with gtsave(..., "<file>.rtf") and as_rtf() now has much more feature parity compared to HTML tables; we can now add summary rows, format table text with Markdown via fmt_markdown(), and expect tables that look acceptable in Word and text editors that are RTF-compatible.
2. Implementation of tidyselect semantics:
• References to columns (by way of the columns argument in many gt functions) now better adhere to tidyselect semantics.
• Instead of using columns = vars(a, b), we now use columns = c(a, b) (columns = c("a", "b") also works, and this type of expression always has been an option in gt).
• Other tidyselect idioms should also work; things like using where() to target columns (e.g., gt(exibble) %>% cols_hide(columns = where(is.numeric)) will hide all numeric columns) and negation (e.g., columns = -c(a, b)) function as expected.

## Breaking changes and deprecations

• Column labels subordinate to column spanner labels had their alignment forced to be "center" but now there is no specialized alignment of column labels under spanners. Should you need the old behavior, tab_style() can be used along with cell_text(align = "center") for all columns that live under spanners. (#662)

• The automatic alignment of integer values has been changed from "center" to "right". To correct for this, use tab_style() with cell_text(align = "center") for all affected columns. (#662)

• As part of the tidyselect changes made in this release, using columns = TRUE (to mean that all columns should be considered) has now been replaced with columns = everything(). Using the former will result in a warning message. (#718)

• While vars() is still reexported in gt, its use with the columns argument (present in a large number of functions) is deprecated and a warning message will appear if it is used. In a later release, it can be expected that vars() will no longer be reexported. (#718)

• The others_label argument of tab_row_group() is deprecated since it was confusing to use. To specify a default label for row groups, the course of action is now to use tab_options(row_group.default_label = <label>). (#699)

## New features

• RTF table output via gtsave(..., "<file>.rtf") and as_rtf() should produce more robust tables (allowing use of summary_rows(), fmt_markdown(), etc.). And tables generated as RTF can now take advantage of cols_width() for flexible modifications of column widths. (#638 and #696)

• All functions with a columns argument can now take advantage of gt’s full adherence to tidyselect semantics (use columns = c(a, b) or columns = c("a", "b") instead of columns = vars(a, b)). (#718)

• New location helper functions have been added to make it possible to style more locations and add footnotes to once inaccessible locations; these are cells_stub_summary(), cells_stub_grand_summary(), cells_footnotes(), and cells_source_notes(). Note that footnotes cannot be declared with the latter two functions. (#737)

• The cols_unhide() function has been added as a complement to the cols_hide() function. This is useful when provided the gt_tbl object without the source data and code to recreate it and there are hidden columns that should be made visible. (#710)

• The new formatting function fmt_bytes() helps you to transform numerical values to byte sizes with human readable units. (#750)

• A new column merging function, cols_merge_n_pct(), works to merge a count column and a percentage column together. This function will automatically hide the col_pct column by default (but that can be changed by setting autohide = FALSE). (#683)

• Added the caption argument to gt(). This brings caption support to gt tables in R Markdown and bookdown documents. (#689)

## Minor improvements

• The accounting option is now available in the fmt_percent() and fmt_number() formatting functions (previously it was only present in fmt_currency()). (#756)

• In RTF documents generated through as_rtf() and gtsave(..., filename = "<file>.rtf"), there is now a page_numbering option for adding page numbers to either the "footer" or the "header" areas (the default is "none"). (#755)

• tab_spanner_delim() gained a split argument to govern whether delimiter splitting should occur at the "first" or "last" instance of delim. For example, if the column name "a.b.c" is present and split = "first" then the spanner column label is "a" and the associated column label will be "b.c"; should split = "last" then the spanner and column will have "a.b" and "c" labels. (#699)

• Added id as an argument to tab_spanner() and tab_row_group(), which is useful for later access to these locations (especially when spanner or row group labels are complicated). (#665, #699)

• HTML table generation is much faster due to efforts to optimize HTML code generation in the building/rendering phase. (#664)

## Bug fixes

• When getting the HTML text for gt table with as_raw_html(..., inline_css = FALSE), the <style> tag content is no longer omitted. (#718)

• Fixed two bugs in tab_row_group(): (1) incorrect reordering of rows (Issue #717), and (2) spurious warnings with multiple calls (Issue #675). (#699)

• The tab_spanner_delim() with gather = TRUE did not work reliably (Issue #626) but was fixed along with other work done to overhaul the function. (#665)

• Correction made to the representation of the PEN (Peruvian Neuvo Sol) currency. (#663)

• Fix for gtsave() when saving an image and specifying a path value. (#592)

# gt 0.2.2 2020-08-05

## New features

• The new opt_table_font() function makes it possible to define a custom font for the entire gt table. The standard fallback fonts are still set by default but the font defined here will take precedence. You could still have different fonts in select locations in the table, and for that you would need to use tab_style() in conjunction with the cell_text() helper function. The new google_font() helper function provides an option for supplying a font available at the Google Fonts service (this is in addition to using system fonts in the font argument). Using the info_google_fonts() function will provide a table with a set of helpful font recommendations from the Google Fonts catalog. The new default_fonts() functions provides a helpful vector of system fallback fonts which works well when defining a vector of fonts. (#591)

• The new opt_css() function makes allows for the addition of custom CSS to a gt table. This CSS will be added after the compiled CSS that gt generates automatically when the gt_tbl object is transformed to an HTML output table. You can supply css as a vector of lines or as a single string. The css() function has been re-exported from htmltools to make it easier to build CSS style declarations. (Also #591)

• Setting the widths of table columns is now easier and more dependable with cols_width(). Widths can be expressed in units of pixels (easily set by use of the px() helper function), as percentages (where the pct() helper function is useful), or a mixture of the two. The function takes into consideration whether an overall table width has been provided with tab_options(table.width = ...). Providing pixel widths for all columns serves to override any table width defined (yielding columns with the exact widths specified). (#561)

• There are new options for numeric formatting: (1) using significant figures (with n_sigfig in fmt_number), and (2) the ability to retain/drop trailing decimal marks (with drop_trailing_dec_mark in fmt_number(), fmt_percent(), and fmt_currency()). Thank you @drolejoel for the suggestion in #535! (#546).

• The new scale_values argument for fmt_percent() makes it easy to use values that are already scaled (and just require the percent mark). Thank you @djohn215 for the suggestion in #559. (#565)

• Font weights expressed as numeric values (e.g., 400, 600, etc.) in cell_text()’s weight argument now works properly. (#591)

## Minor improvements and bug fixes

• The data_color() function has been rewritten to improve performance (#543). (#576)

• Restore the ability to have row striping in stub cells (with tab_option()’s row.striping.include_stub = TRUE). Thanks @gergness for creating PR #537, which prompted this final fix. (#564)

# gt 0.2.1 2020-05-23

• summary_rows() and grand_summary_rows() no longer incorrectly calculate summary values in cases where rows aren’t already sorted by group (#556).

• Ensure compatibility with tibble 3.0.0. (#557)

• Adapt tests to changes in dependent packages. (#575)

# gt 0.2.0.5 2020-03-31

• New package with 80 exported functions for building display tables