Module:Weather
This module can be used to display temperatures in a table. It is under development and is intended to be efficient so a page can hold many tables.
- Input numbers must use a hyphen if negative (Unicode minus "−" would give an error).
- All displayed numbers (including inputs) use Unicode minus if negative.
- The input consists of 13 values, separated by any number of spaces.
- Each of the 13 values must be a number. Any invalid value results in the corresponding cell being blank with no error message or tracking category.
The following functions are available:
Function | Input | Output |
---|---|---|
CtoF |
°C | °C (°F) |
FfromC |
°C | °F (°C) |
CfromF |
°F | °C (°F) |
FtoC |
°F | °F (°C) |
The following templates use the module:
An example using the above templates and the module is at:
The output can be examined by entering the following example at Special:ExpandTemplates. The output from each of the following lines is identical.
{{#invoke:weather|CtoF|-10 -5 0 5 10 15 20 25 30 35 40 45 50}} ---- {{#invoke:weather|CfromF|14 23 32 41 50 59 68 77 86 95 104 113 122}}
Optional parameter
|palette=
name- Where name is the built-in name of a palette:
- cool (default)
- cool2 (modified)
- cool2avg (modified and intended for average temperatures)
- Where name is the built-in name of a palette:
Testing
[edit]The function show
provides a way to test the color schemes. It generates a graph of how the red, green, and blue portions of the color vary with temperature, and a table of the full range of temperatures in °C.
Optional parameters
- Two unnamed parameters may be entered to specify the first and last Celsius temperatures (
|-90|59
by default). - The palette can be specified with
|palette=
name as above.
The following codes produce the same result:
{{#invoke:weather|show}}
{{#invoke:weather|show|palette=cool}}
−90 | −89 | −88 | −87 | −86 | −85 | −84 | −83 | −82 | −81 |
−80 | −79 | −78 | −77 | −76 | −75 | −74 | −73 | −72 | −71 |
−70 | −69 | −68 | −67 | −66 | −65 | −64 | −63 | −62 | −61 |
−60 | −59 | −58 | −57 | −56 | −55 | −54 | −53 | −52 | −51 |
−50 | −49 | −48 | −47 | −46 | −45 | −44 | −43 | −42 | −41 |
−40 | −39 | −38 | −37 | −36 | −35 | −34 | −33 | −32 | −31 |
−30 | −29 | −28 | −27 | −26 | −25 | −24 | −23 | −22 | −21 |
−20 | −19 | −18 | −17 | −16 | −15 | −14 | −13 | −12 | −11 |
−10 | −9 | −8 | −7 | −6 | −5 | −4 | −3 | −2 | −1 |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 |
30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 |
40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 |
50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 |
![]() | Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org. |
![]() | Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org. |
![]() | Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org. |
Modified palette:
{{#invoke:weather|show|palette=cool2}}
−90 | −89 | −88 | −87 | −86 | −85 | −84 | −83 | −82 | −81 |
−80 | −79 | −78 | −77 | −76 | −75 | −74 | −73 | −72 | −71 |
−70 | −69 | −68 | −67 | −66 | −65 | −64 | −63 | −62 | −61 |
−60 | −59 | −58 | −57 | −56 | −55 | −54 | −53 | −52 | −51 |
−50 | −49 | −48 | −47 | −46 | −45 | −44 | −43 | −42 | −41 |
−40 | −39 | −38 | −37 | −36 | −35 | −34 | −33 | −32 | −31 |
−30 | −29 | −28 | −27 | −26 | −25 | −24 | −23 | −22 | −21 |
−20 | −19 | −18 | −17 | −16 | −15 | −14 | −13 | −12 | −11 |
−10 | −9 | −8 | −7 | −6 | −5 | −4 | −3 | −2 | −1 |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 |
30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 |
40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 |
50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 |
![]() | Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org. |
![]() | Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org. |
![]() | Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org. |
This modified palette is intended for average temperatures. It results in good colors between the extreme highest average monthly temperature of +39 °C (102 °F) in Death Valley, California, and −68 °C (−90 °F), the extreme lowest average monthly temperature at Vostok Station, at a high elevation on the Antarctic ice sheet. These are the highest and lowest known average temperatures recorded on Earth, not to be confused with the highest and lowest records, which are quite a bit hotter and colder.
{{#invoke:weather|show|palette=cool2avg}}
−90 | −89 | −88 | −87 | −86 | −85 | −84 | −83 | −82 | −81 |
−80 | −79 | −78 | −77 | −76 | −75 | −74 | −73 | −72 | −71 |
−70 | −69 | −68 | −67 | −66 | −65 | −64 | −63 | −62 | −61 |
−60 | −59 | −58 | −57 | −56 | −55 | −54 | −53 | −52 | −51 |
−50 | −49 | −48 | −47 | −46 | −45 | −44 | −43 | −42 | −41 |
−40 | −39 | −38 | −37 | −36 | −35 | −34 | −33 | −32 | −31 |
−30 | −29 | −28 | −27 | −26 | −25 | −24 | −23 | −22 | −21 |
−20 | −19 | −18 | −17 | −16 | −15 | −14 | −13 | −12 | −11 |
−10 | −9 | −8 | −7 | −6 | −5 | −4 | −3 | −2 | −1 |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 |
30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 |
40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 |
50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 |
![]() | Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org. |
![]() | Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org. |
![]() | Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org. |
--[[
Efficient (fast) functions to implement cells in tables of weather data.
Temperature conversion is built-in, but for simplicity, temperatures
are assumed to be for habitable locations (from -100 to 100 °C).
]]
local MINUS = '−' -- Unicode U+2212 MINUS SIGN
local function temperature_style(palette, value, out_rgb)
-- Return style for a table cell based on the given value which
-- should be a temperature in °C.
local function style(bg, fg)
local min, max = unpack(palette.white or { -23, 35 })
if not fg and value and (value < min or value >= max) then
fg = 'FFFFFF'
end
if fg then
fg = 'color:#' .. fg .. ';'
else
fg = ''
end
return 'style="background:#' .. bg .. ';' .. fg .. ' font-size:100%;"'
end
if type(value) ~= 'number' then
return style('FFFFFF', '000000')
end
local rgb = out_rgb or {}
for i, v in ipairs(palette) do
local a, b, c, d = unpack(v)
if value <= a then
rgb[i] = 0
elseif value < b then
rgb[i] = (value - a) * 255 / (b - a)
elseif value <= c then
rgb[i] = 255
elseif value < d then
rgb[i] = 255 - ( (value - c) * 255 / (d - c) )
else
rgb[i] = 0
end
end
return style(string.format('%02X%02X%02X', rgb[1], rgb[2], rgb[3]))
end
local function format_cell(palette, value, intext, outtext)
-- Return one line of wikitext to make a cell in a table.
if not value then
return '|\n'
end
local text
if outtext then
text = intext .. '<br>(' .. outtext .. ')'
else
text = intext
end
return '| ' .. temperature_style(palette, value) .. ' | ' .. text .. '\n'
end
local function process_temperature(intext, inunit, swap)
--[[ Convert °C to °F or vice versa, assuming the temperature is for a
habitable location, well inside the range -100 to 100 °C.
That simplifies determining precision and formatting (no commas are needed).
Return (celsius_value, intext, outtext) if valid; otherwise return nil.
The returned input and output are swapped if requested.
Each returned string has a Unicode MINUS as sign, if negative. ]]
local invalue = tonumber(intext)
if not invalue then return nil end
local integer, dot, decimals = intext:match('^%s*%-?(%d+)(%.?)(%d*)%s*$')
if not integer then return nil end
if invalue < 0 then
intext = MINUS .. integer .. dot .. decimals
end
local outtext
if inunit == 'C' or inunit == 'F' then
local celsius_value, outvalue
if inunit == 'C' then
outvalue = invalue * (9/5) + 32
celsius_value = invalue
else
outvalue = (invalue - 32) * (5/9)
celsius_value = outvalue
end
local precision = dot == '' and 0 or #decimals
outtext = string.format('%.' .. precision .. 'f', math.abs(outvalue) + 2e-14)
if outvalue < 0 and tonumber(outtext) ~= 0 then
-- Don't show minus if result is negative but rounds to zero.
outtext = MINUS .. outtext
end
if swap then
return celsius_value, outtext, intext
end
return celsius_value, intext, outtext
end
-- LATER Think about whether a no-conversion option would be useful.
return invalue, intext, outtext
end
local function temperature_row(palette, row, inunit, swap)
--[[
Return 13 lines specifying the style/content of 13 table cells.
Input is 13 space-separated words, each a number (°C or °F).
Any word that is not a number gives a blank cell ("M" for a missing cell).
Any excess words are ignored.
Function Input Output
------------------------
CtoF C C/F
FfromC C F/C
CfromF F C/F
FtoC F F/C ]]
local nrcol = 13
local results, n = {}, 0
for word in row:gmatch('%S+') do
n = n + 1
if n > nrcol then
break
end
results[n] = format_cell(palette, process_temperature(word, inunit, swap))
end
for i = n + 1, nrcol do
results[i] = format_cell()
end
return table.concat(results)
end
local palettes = {
-- A background color entry in a palette is a table of four numbers,
-- say { 11, 22, 33, 44 } (values in °C).
-- That means the color is 0 below 11 and above 44, and is 255 from 22 to 33.
-- The color rises from 0 to 255 between 11 and 22, and falls between 33 and 44.
cool = {
{ -42.75, 4.47, 41.5, 60 },
{ -42.75, 4.47, 4.5, 41.5 },
{ -90 , -42.78, 4.5, 23 },
white = { -23.3, 37.8 },
},
cool2 = {
{ -42.75, 4.5 , 41.5, 56 },
{ -42.75, 4.5 , 4.5, 41.5 },
{ -90 , -42.78, 4.5, 23 },
white = { -23.3, 35 },
},
cool2avg = {
{ -38, 4.5, 25 , 45 },
{ -38, 4.5, 4.5, 30 },
{ -70, -38 , 4.5, 23 },
white = { -23.3, 25 },
},
}
local function temperatures(frame, inunit, swap)
local palette = palettes[frame.args.palette] or palettes.cool
return temperature_row(palette, frame.args[1], inunit, swap)
end
local function CtoF(frame)
return temperatures(frame, 'C')
end
local function CfromF(frame)
return temperatures(frame, 'F', true)
end
local function FtoC(frame)
return temperatures(frame, 'F')
end
local function FfromC(frame)
return temperatures(frame, 'C', true)
end
local chart = [[
{{Graph:Chart
|width=600
|height=180
|xAxisTitle=Celsius
|yAxisTitle=__COLOR
|type=line
|x=__XVALUES
|y=__YVALUES
|colors=__COLOR
}}
]]
local function show(frame)
--[[ For testing, return wikitext to show graphs of how the red/green/blue colors
vary with temperature, and a table of the resulting colors. ]]
local function collection()
-- Return a table to hold items.
return {
n = 0,
add = function (self, item)
self.n = self.n + 1
self[self.n] = item
end,
join = function (self, sep)
return table.concat(self, sep)
end,
}
end
local function make_chart(result, color, xvalues, yvalues)
result:add('\n')
result:add(frame:preprocess((chart:gsub('__[A-Z]+', {
__COLOR = color,
__XVALUES = xvalues:join(','),
__YVALUES = yvalues:join(','),
}))))
end
local function with_minus(value)
if value < 0 then
return MINUS .. tostring(-value)
end
return tostring(value)
end
local args = frame.args
local first = args[1] or -90
local last = args[2] or 59
local palette = palettes[args.palette] or palettes.cool
local xvals, reds, greens, blues = collection(), collection(), collection(), collection()
local wikitext = collection()
wikitext:add(
[[
{| class="wikitable"
|-
]]
)
local columns = 0
for celsius = first, last do
local rgb = {}
local style = temperature_style(palette, celsius, rgb)
local R = math.floor(rgb[1])
local G = math.floor(rgb[2])
local B = math.floor(rgb[3])
xvals:add(celsius)
reds:add(R)
greens:add(G)
blues:add(B)
wikitext:add('| ' .. style .. ' | ' .. with_minus(celsius) .. '\n')
columns = columns + 1
if columns >= 10 then
columns = 0
wikitext:add('|-\n')
end
end
wikitext:add('|}\n')
make_chart(wikitext, 'Red', xvals, reds)
make_chart(wikitext, 'Green', xvals, greens)
make_chart(wikitext, 'Blue', xvals, blues)
return wikitext:join()
end
return {
CtoF = CtoF,
CfromF = CfromF,
FtoC = FtoC,
FfromC = FfromC,
show = show,
}