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Can not guarantee accuracy or correctness of data. Properties collected form various sources and rearranged for Smath. Do you think would it be beneficial to write a plugin for this database? Or would this import matrix is enough for anybody for any work? Regards  elements.zip (10kb) downloaded 55 time(s).
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Some years ago I made an SMath sheet for Ashby material property charts, which also had an external database (from the companion materials of a book). Look some posts further down to find an improved version. The actual chart was produced using Maxima, because the Ashby charts are usually loglog. The program suffers from the known problem with character encoding in recent SMath versions. If lin-lin is ok, the graphics part could be made using XY-plot plugin. Also, there is no need for the bubbles, as your data doesn't have ranges. Anyways, it is fun to play around with the properties to display and find out correlations. |
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 Rank: Advanced Member Groups: Registered
Joined: 29/11/2017(UTC) Posts: 82  Location: Midwest Was thanked: 9 time(s) in 7 post(s)
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I recall a MathCad 15 worksheet "Molecular Weights" that, if/when converted, would be a nice addition in SMATH as well.
Best regards,
Norm
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Originally Posted by: nasch  I recall a MathCad 15 worksheet "Molecular Weights" that, if/when converted, would be a nice addition in SMATH as well.
Best regards,
Norm Hi Norm. maybe you find interesting this post: https://en.smath.com/for...equations.aspx#post66837 It is for balancing chemical equations, but has a function for calculating the mass compound too. Best regards.
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Rank: Advanced Member Groups: Registered
Joined: 29/11/2017(UTC) Posts: 82 Location: Midwest Was thanked: 9 time(s) in 7 post(s)
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Thanks Alvaro! Upon running the worksheet, ChemBal v2.sm, I get the following error: "Index was outside the bounds of the array". I welcome your review and recommendations. Sincerely, Norm 
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Rank: Advanced Member Groups: Registered
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Hi Norm. I can't reproduce the error.
Best regards.
Alvaro.
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Rank: Advanced Member Groups: Registered
Joined: 29/11/2017(UTC) Posts: 82 Location: Midwest Was thanked: 9 time(s) in 7 post(s)
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Hummm! Strange! When I turn Auto Calculate off then there is a solution. Once re-calculated, it fails. Can you send me your latest worksheet?
Thank you,
Norm
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Rank: Advanced Member Groups: Registered
Joined: 28/08/2014(UTC) Posts: 1,356 Was thanked: 815 time(s) in 516 post(s)
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Originally Posted by: nasch Hummm! Strange! When I turn Auto Calculate off then there is a solution. Once re-calculated, it fails. Can you send me your latest worksheet?
Thank you,
Norm Hi Norma. That is the last version I developed. ChemBal v2.pdf (351kb) downloaded 54 time(s). ChemBal v2.sm (144kb) downloaded 71 time(s).I simply added that I could recognize the notation "·" in chemistry with respect to the previous one, and I don't know if ions too, I don't remember well. The little program doesn't have strange or far-fetched elements, it uses the dn_LinAlgSVD plugin to obtain the nullspace array and the code to obtain the elements of a compound is not really from Mathcad, but rather one in visual basic that I had in an excel macro, but handles text as usual. If you have many vectorizations and summations, and perhaps some of them do not please SMath very much, In addition, it is strange that it does not work in auto calculation, but it does. The truth is that I hardly ever work with auto calculation on. Best regards. Alvaro.
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Rank: Advanced Member Groups: Registered
Joined: 29/11/2017(UTC) Posts: 82 Location: Midwest Was thanked: 9 time(s) in 7 post(s)
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Thanks Alvaro,
Unfortunately, when I recalculate the sheet, the ChemBal(R) fails; "Index was outside the bounds of the array"
Norm
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Rank: Advanced Member Groups: Registered
Joined: 28/08/2014(UTC) Posts: 1,356 Was thanked: 815 time(s) in 516 post(s)
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Originally Posted by: nasch Thanks Alvaro,
Unfortunately, when I recalculate the sheet, the ChemBal(R) fails; "Index was outside the bounds of the array"
Norm Hi Norm. This version is pluginless, using it's own routine for get the SV Decomposition, and seems that works in SMath in the cloud: https://en.smath.com/cloud/worksheet/y4ZHBgHGBest regards. Alvaro.
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Rank: Advanced Member Groups: Registered
Joined: 29/11/2017(UTC) Posts: 82 Location: Midwest Was thanked: 9 time(s) in 7 post(s)
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Thanks Alvaro! File ChemBal_NR works!
Best regards,
Norm
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