Thanks, I have also posted this question on Stackoverflow (http://stackoverflow.com/questions/29377097/lua-module-for-calculating-the-m...) someone with Lua skills but not so much with MediaWiki Lua templating and they gave this code:

|local AtomicWeightLookup= { C= 12.01, H= 1.001, O= 16 }

local function Calculate(Input) -- Input Example: {C = 2, H = 6, O = 1} local Result= 0 -- Iterate through Input table for Element,Quantityin next,Inputdo -- If element is not found in table, assume 0 weight. local AtomicWeight= AtomicWeightLookup[Element] or 0 -- Multiply Result= Result+ Quantity* AtomicWeight end return Result end

-- EXAMPLE print(Calculate({C= 2, H= 6, O= 1}))|

but as you can see there's no variables in here that are set by MediaWiki templates, but it seems like a decent starting place.

On 1/04/2015 7:41 AM, Pine W wrote:

Pinging Jmorgan who I believe knows Lua. (:

Pine On Mar 31, 2015 2:27 PM, "Brenton Horne" brentonhorne77@gmail.com wrote:

...

I have just tried solving this problem myself, using the /Module:Molar mass calculator/:

-- Setting up p and args local p= {}; local args M= mw.loadData( 'Module:Standard atomic weight' ); function dotprod(a, b) local ret= 0 for i= 1, #ado ret= ret+ a[i] * b[i]; end return ret end return dotprod(args, M)

with /Module:Standard atomic weight/ having the contents:

local M= {} M[Ag] = 107.8682 -- Silver (Ag) M[As] = 74.921595 -- Arsenic (As) M[Au] = 196.966569 -- Gold (Au) M[B] = 10.8135 -- Boron (B) M[Ba] = 137.327 -- Barium (Ba) M[Bi] = 208.9804 -- Bismuth (Bi) M[Br] = 79.904 -- Bromine (Br) M[C] = 12.0106 -- Carbon (C) M[Ca] = 40.078 -- Calcium (Ca) M[Cl] = 35.4515 -- Chlorine (Cl) M[Co] = 58.933194 -- Cobalt (Co) M[Cu] = 63.546 -- Copper (Cu) M[C] = 18.998403163 -- Fluorine (F) M[Fe] = 55.845 -- Iron (Fe) M[Ga] = 69.723 -- Gallium (Ga) M[H] = 1.007975 -- Hydrogen (H) M[Hg] = 200.592 -- Mercury (Hg) M[I] = 126.90447 -- Iodine (I) M[K] = 39.0983 -- Potassium (K) M[Li] = 6.9675 -- Lithium (Li) M[Mg] = 24.3055 -- Magnesium (Mg) M[Mn] = 54.938044 -- Manganese (Mn) M[N] = 14.006855 -- Nitrogen (N) M[Na] = 22.98976928 -- Sodium (Na) M[Ni] = 58.6934 -- Nickel (Ni) M[O] = 15.9994 -- Oxygen (O) M[P] = 30.973761998 -- Phosphorus (P) M[Pb] = 207.2 -- Lead (Pb) M[Pt] = 195.084 -- Platinum (Pt) M[S] = 32.0675 -- Sulfur (S) M[Tl] = 204.3835 -- Thallium (Tl) M[Zn] = 65.38 -- Zinc (Zn) return M

but this gives the Script error:

Script error: You must specify a function to call.

No further details are available.

If someone is actually planning on helping me with this I'd like to know because I have bad experience with this list and MediaWiki-I list when it comes to Lua questions, in that I never seem to get an answer.

On 1/04/2015 5:06 AM, Brenton Horne wrote:

...

Hi,

I'd like to be able to calculate the molar mass of chemical compounds using a Lua module so that I could use the output in my infoboxes for chemical compounds and drugs alike. The problem is, I haven't the foggiest how to set up a module, even one that sounds so simple. I was hoping that someone may be able to set things up for me, or at least show me how to do so myself^1 if I gave them the basic idea of what I was hoping this module would do.

Say we call the module Molar mass calculator (i.e., @ /Module:Molar mass calculator/ on my local Wiki is where its Lua code is and the template that invokes it /Template:Molar mass calculator/^2 ). I was thinking of the Lua module using a pair of vectors one (A⇀\vec{A}) containing the user-defined variables^3 of all 84 chemical elements found in appreciable quantities in nature and the other containing the average atomic mass for all these elements (M⇀\vec{M}). Then doing the Lua equivalent to a dot product (i.e., A⇀⋅M⇀=∑i=184AiMi\vec{A}\cdot \vec{M} = \sum_{i=0}^{84} A_i M_i) between these two vectors and using the result as the module's output which would then//used by the template as its output.

     Footnotes

  1. Keeping in mind I am a programming noob, especially when it
     comes to Lua, so talk to me like a maths guy that just
     understands a little MATLAB, NumPy, SciPy, Python and Wikitext
     and no other programming languages as this is fairly accurate.
  2. /Template:Molar mass calculator/, presently has this Wikitext
     (hence if a change is required please do alert me to it):

     {{#invoke:Molar mass calculator}}<noinclude>{{Clr}}
     {{documentation}}</noinclude>

  3. These variables are those provided to /Template:Molar mass
     calculator/ as arguments. For example, if I want to call the
     template in a Wiki page it may look like this for Ethanol (C_2
     H_6 O)

     {{Molar mass calculator
     |C      =  2
     |H      = 6
     |O      = 1
     }}

     and should provide the output of 46.0694 g/mol.

Thanks for your time, Brenton

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Thanks for this. What should /Template:Molar mass calculator/ look like? Currently I have:

{{#invoke:Molar mass calculator|calc}}

but this returns a null value when variables are provided.

On 1/04/2015 12:44 PM, Ori Livneh wrote:

On Tue, Mar 31, 2015 at 3:25 PM, Brenton Horne brentonhorne77@gmail.com wrote:

...

Thanks, I have also posted this question on Stackoverflow ( http://stackoverflow.com/questions/29377097/lua-module- for-calculating-the-molar-mass-of-chemical-compounds) someone with Lua skills but not so much with MediaWiki Lua templating and they gave this code:

|local AtomicWeightLookup= { C= 12.01, H= 1.001, O= 16 }

local function Calculate(Input) -- Input Example: {C = 2, H = 6, O = 1} local Result= 0 -- Iterate through Input table for Element,Quantityin next,Inputdo -- If element is not found in table, assume 0 weight. local AtomicWeight= AtomicWeightLookup[Element] or 0 -- Multiply Result= Result+ Quantity* AtomicWeight end return Result end

-- EXAMPLE print(Calculate({C= 2, H= 6, O= 1}))|

but as you can see there's no variables in here that are set by MediaWiki templates, but it seems like a decent starting place.

Here you go: https://test2.wikipedia.org/wiki/Module:Standard_atomic_weight https://test2.wikipedia.org/wiki/Module:Molar_mass_calculator demo: https://test2.wikipedia.org/wiki/Module_talk:Molar_mass_calculator

Note that your table had an error -- the atomic weight of Fluorine is assigned to symbol 'C' rather than 'F'. _______________________________________________ Wikitech-l mailing list Wikitech-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikitech-l

I have this template within my Chembox {{Molar mass calculator| |Ag ={{{Ag|}}} |As ={{{As|}}} |Au ={{{Au|}}} |B ={{{B|}}} |Ba ={{{Ba|}}} |Bi ={{{Bi|}}} |Br ={{{Br|}}} |C ={{{C|}}} |Ca ={{{Ca|}}} |Cl ={{{Cl|}}} |Co ={{{Co|}}} |Cu ={{{Cu|}}} |F ={{{F|}}} |Fe ={{{Fe|}}} |H ={{{H|}}} |I ={{{I|}}} |K ={{{K|}}} |Li ={{{Li|}}} |N ={{{N|}}} |Na ={{{Na|}}} |Ni ={{{Ni|}}} |O ={{{O|}}} |P ={{{P|}}} |Pt ={{{Pt|}}} |S ={{{S|}}} |Se ={{{Se|}}} |Sr ={{{Sr|}}} |Zn ={{{Zn|}}} }} as each of these element parameters are optional they can be null and even when some parameters are provided I get the script error:

Lua error in Module:Molar_mass_calculator at line 8: attempt to perform arithmetic on a nil value.

Backtrace:

1. *(tail call)*: ? 2. *Module:Molar_mass_calculator:8 http://localhost/mediawiki/index.php?title=Module:Molar_mass_calculator&action=edit#mw-ce-l8*: in function "chunk" 3. *mw.lua:497*: ? 4. *(tail call)*: ? 5. *[C]*: in function "xpcall" 6. *MWServer.lua:87*: in function "handleCall" 7. *MWServer.lua:301*: in function "dispatch" 8. *MWServer.lua:58*: ? 9. *(tail call)*: ? 10. *mw.lua:141*: ? 11. *Module:Infobox:320 http://localhost/mediawiki/index.php?title=Module:Infobox&action=edit#mw-ce-l320*: in function "preprocessArgs" 12. *Module:Infobox:373 http://localhost/mediawiki/index.php?title=Module:Infobox&action=edit#mw-ce-l373*: in function "chunk" 13. *mw.lua:497*: ? 14. *(tail call)*: ? 15. *[C]*: in function "xpcall" 16. *MWServer.lua:87*: in function "handleCall" 17. *MWServer.lua:301*: in function "dispatch" 18. *MWServer.lua:40*: in function "execute" 19. *mw_main.lua:7*: in main chunk 20. *[C]*: ?

any ideas of how to overcome this error?

On 1/04/2015 7:28 PM, Ricordisamoa wrote:

To get parameters passed to the template, just call :getParent() in the module: example https://test2.wikipedia.org/wiki/Special:Diff/155912

Il 01/04/2015 11:13, Brenton Horne ha scritto:

...

Thanks for this. What should /Template:Molar mass calculator/ look like? Currently I have:

{{#invoke:Molar mass calculator|calc}}

but this returns a null value when variables are provided.

On 1/04/2015 12:44 PM, Ori Livneh wrote:

...

On Tue, Mar 31, 2015 at 3:25 PM, Brenton Horne brentonhorne77@gmail.com wrote:

...

Thanks, I have also posted this question on Stackoverflow ( http://stackoverflow.com/questions/29377097/lua-module- for-calculating-the-molar-mass-of-chemical-compounds) someone with Lua skills but not so much with MediaWiki Lua templating and they gave this code:

|local AtomicWeightLookup= { C= 12.01, H= 1.001, O= 16 }

local function Calculate(Input) -- Input Example: {C = 2, H = 6, O = 1} local Result= 0 -- Iterate through Input table for Element,Quantityin next,Inputdo -- If element is not found in table, assume 0 weight. local AtomicWeight= AtomicWeightLookup[Element] or 0 -- Multiply Result= Result+ Quantity* AtomicWeight end return Result end

-- EXAMPLE print(Calculate({C= 2, H= 6, O= 1}))|

but as you can see there's no variables in here that are set by MediaWiki templates, but it seems like a decent starting place.

Here you go: https://test2.wikipedia.org/wiki/Module:Standard_atomic_weight https://test2.wikipedia.org/wiki/Module:Molar_mass_calculator demo: https://test2.wikipedia.org/wiki/Module_talk:Molar_mass_calculator

Note that your table had an error -- the atomic weight of Fluorine is assigned to symbol 'C' rather than 'F'. _______________________________________________ Wikitech-l mailing list Wikitech-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikitech-l

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Well actually after I sent my reply I did this hoping it might overcome this problem, it gave Nada, I'm afraid it still felt I was using a nil value.

On 1/04/2015 10:44 PM, Ricordisamoa wrote:

Il 01/04/2015 11:52, Brenton Horne ha scritto:

...

I have this template within my Chembox {{Molar mass calculator| |Ag ={{{Ag|}}} |As ={{{As|}}} |Au ={{{Au|}}} |B ={{{B|}}} |Ba ={{{Ba|}}} |Bi ={{{Bi|}}} |Br ={{{Br|}}} |C ={{{C|}}} |Ca ={{{Ca|}}} |Cl ={{{Cl|}}} |Co ={{{Co|}}} |Cu ={{{Cu|}}} |F ={{{F|}}} |Fe ={{{Fe|}}} |H ={{{H|}}} |I ={{{I|}}} |K ={{{K|}}} |Li ={{{Li|}}} |N ={{{N|}}} |Na ={{{Na|}}} |Ni ={{{Ni|}}} |O ={{{O|}}} |P ={{{P|}}} |Pt ={{{Pt|}}} |S ={{{S|}}} |Se ={{{Se|}}} |Sr ={{{Sr|}}} |Zn ={{{Zn|}}} }} as each of these element parameters are optional they can be null and even when some parameters are provided I get the script error:

Lua error in Module:Molar_mass_calculator at line 8: attempt to perform arithmetic on a nil value.

Backtrace:

1. *(tail call)*: ?
2. *Module:Molar_mass_calculator:8

http://localhost/mediawiki/index.php?title=Module:Molar_mass_calculator&action=edit#mw-ce-l8*:

in function "chunk" 3. *mw.lua:497*: ? 4. *(tail call)*: ? 5. *[C]*: in function "xpcall" 6. *MWServer.lua:87*: in function "handleCall" 7. *MWServer.lua:301*: in function "dispatch" 8. *MWServer.lua:58*: ? 9. *(tail call)*: ? 10. *mw.lua:141*: ? 11. *Module:Infobox:320 http://localhost/mediawiki/index.php?title=Module:Infobox&action=edit#mw-ce-l320*:

in function "preprocessArgs" 12. *Module:Infobox:373 http://localhost/mediawiki/index.php?title=Module:Infobox&action=edit#mw-ce-l373*:

in function "chunk" 13. *mw.lua:497*: ? 14. *(tail call)*: ? 15. *[C]*: in function "xpcall" 16. *MWServer.lua:87*: in function "handleCall" 17. *MWServer.lua:301*: in function "dispatch" 18. *MWServer.lua:40*: in function "execute" 19. *mw_main.lua:7*: in main chunk 20. *[C]*: ?

any ideas of how to overcome this error?

Have you tried putting "{{#invoke:Molar mass calculator | calc}}" in your Chembox instead of the template?

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On Wed, Apr 1, 2015 at 3:36 PM, Brenton Horne brentonhorne77@gmail.com wrote:

Any one know how to overcome this problem, or are yas all stumped?

I've added some error handling to https://test2.wikipedia.org/wiki/Module:Molar_mass_calculator for you; most likely it was trying to use a quantity of empty-string for any elements you didn't specify in your Chembox, which tonumber() converts to nil. You could probably also have had your Chembox pass 0 as a default (e.g. {{{Ag|0}}} instead of {{{Ag|}}}).

If it's still not working, feel free to put your test cases on test2wiki so we can see them directly.

Oh hey one other thing, how do I get the module to round the result to 3 decimal places?

On 2/04/2015 10:27 AM, Brad Jorsch (Anomie) wrote:

On Wed, Apr 1, 2015 at 3:36 PM, Brenton Horne brentonhorne77@gmail.com wrote:

...

Any one know how to overcome this problem, or are yas all stumped?

I've added some error handling to https://test2.wikipedia.org/wiki/Module:Molar_mass_calculator for you; most likely it was trying to use a quantity of empty-string for any elements you didn't specify in your Chembox, which tonumber() converts to nil. You could probably also have had your Chembox pass 0 as a default (e.g. {{{Ag|0}}} instead of {{{Ag|}}}).

If it's still not working, feel free to put your test cases on test2wiki so we can see them directly.