Template:Bartable

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This template adds an inline bar graph to tables with numeric (including negative) values that a reader may wish to compare.

Use this template inside a table. The template generates either two table cells (for cases in which all values are positive) or three (to accommodate negative bars going off to the left). Thus, your table headers should have colspan="2" or colspan="3" (or similar combinations), respectively, to correctly span the columns.

The template generates two cells if the scale parameter is positive and three if it is negative.

Usage

{{bartable|value|unit|scale|height|style}}

value (mandatory)

any real number or math expression that evaluates to a number. Commas can be used to group digits. See Help:Calculation for the syntax for math expressions.

unit (default = empty string)

the unit, e.g. "m" for metres. Prepend a space if you want a space between the value and the unit. If unit starts with "/", the value is converted between units (using the convert template) as follows:

"/unit1/unit2/round" converts the value from unit1 to unit2 and rounds it to round decimal places (using {{convert|value|unit1|unit2|round|abbr=on}}). Unfortunately unit1, unit2 or round cannot contain a "/" or a "=" — if anyone knows how to allow it (or translate other characters to it), please help.

scale (default = 1): a factor multiplied by value to give the width of the bar in pixels. Use the same scale in every row, as otherwise the bar chart won’t be to scale!; scale can be negative, in which case an additional column (for showing negative values) is created. See example below.
height (default = "2ex"): the height of the bar as a CSS measurement e.g. "1em" or "16px".
style (default = empty string): a CSS style string to apply to the bar, e.g. "background:red;".

Examples

Real-world example

{| class="wikitable"
|+ Melting point at 1 atmosphere
! Substance  !! Temperature !! colspan="2" | Relative size
|-
| Mercury    || {{bartable| -38.72|/C/F|-2|1em|background:silver}}
|-
| Bromine    || {{bartable|  -7.10|/C/F|-2|1em|background:brown}}
|-
| Water      || {{bartable|      0|/C/F|-2|1em}}
|-
| Phosphorus || {{bartable|  44.10|/C/F|-2|1em|background:red}}
|-
| Iodine     || {{bartable| 113.50|/C/F|-2|1em|background:indigo}}
|-
| Sulphur    || {{bartable| 115.36|/C/F|-2|1em|background:yellow}}
|}

Melting point at 1 atmosphere
Substance	Temperature
Mercury	−38.72 °C (−37.70 °F)
Bromine	−7.10 °C (19.22 °F)
Water	0 °C (32 °F)
Phosphorus	44.10 °C (111.38 °F)	44.1
Iodine	113.50 °C (236.30 °F)	113.5
Sulphur	115.36 °C (239.65 °F)	115.36

2-column (only positive values)

{| class="wikitable"
! Example                             || colspan="2" | Rendering
|-
| Only value                          || {{bartable|272}}
|-
| Negative value                      || {{bartable|-72}}
|-
| Math expression                     || {{bartable|exp(1)*1e2}}
|-
| Value and unit (note added space)   || {{bartable|272| km/h}}
|-
| Value and unit (link to definition) || {{bartable|272|[[Degree_(angle)|°]]}}
|-
| Value and unit (with formatting)    || align="right"|''θ'' = {{bartable|272|°}}
|-
| Value and unit (with conversion)    || {{bartable|272|/km/mi}}
|-
| Value and scale                     || {{bartable|272||1/(2^0.5)}}
|-
| Value and height                    || {{bartable|272|||4px}}
|-
| Value and style                     || {{bartable|272||||background:blue;}}
|-
| Value with commas, and scale        || {{bartable|2,720||.1}}
|-
| The full monty                      || {{bartable|18^2|%|sin(1)|2em|border:ridge red;}}
|-
|}

Example	Rendering
Only value	272	272
Negative value	-72
Math expression	exp(1)*1e2	271.8281828459
Value and unit (note added space)	272 km/h	272
Value and unit (link to definition)	272°	272
Value and unit (with formatting)	θ = 272°	272
Value and unit (with conversion)	272 km (169 mi)	272
Value and scale	272	272
Value and height	272	272
Value and style	272	272
Value with commas, and scale	2,720	2720
The full monty	18^2%	324

3-column (positive and negative values)

{| class="wikitable"
! Example                             || colspan="3" | Rendering
|-
| Only value                          || {{bartable|272||-1}}
|-
| Negative value                      || {{bartable|-72||-1}}
|-
| Math expression                     || {{bartable|exp(1)*1e2||-1}}
|-
| Value and unit (note added space)   || {{bartable|272| km/h|-1}}
|-
| Value and unit (link to definition) || {{bartable|272|[[Degree_(angle)|°]]|-1}}
|-
| Value and unit (with formatting)    || align="right"|''θ'' = {{bartable|272|°|-1}}
|-
| Value and unit (with conversion)    || {{bartable|272|/km/mi|-1}}
|-
| Value and scale                     || {{bartable|272||-1/(2^0.5)}}
|-
| Value and height                    || {{bartable|272||-1|4px}}
|-
| Value and style                     || {{bartable|272||-1||background:blue;}}
|-
| Value with commas, and scale        || {{bartable|2,720||-.1}}
|-
| The full monty                      || {{bartable|18^2|%|sin(-1)|2em|border:ridge red;}}
|-
|}

Example	Rendering
Only value	272	272
Negative value	-72
Math expression	exp(1)*1e2	271.8281828459
Value and unit (note added space)	272 km/h	272
Value and unit (link to definition)	272°	272
Value and unit (with formatting)	θ = 272°	272
Value and unit (with conversion)	272 km (169 mi)	272
Value and scale	272	272
Value and height	272	272
Value and style	272	272
Value with commas, and scale	2,720	2720
The full monty	18^2%	324