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Function from plot - Messages
#1 Posted: 6/6/2023 8:19:33 AM
#2 Posted: 6/6/2023 8:59:59 AM
WroteHow can I get a function from this plot ?
1. Probably from the expensive digitizer suggested by Richard [Mathsoft Collaboratory]
2. Piecewise from Tracer.
3. Try Mathsoft digitizer.
4. Smath difficult
At this point from the collected data set, fit a model function.
Cheers ... Jean.
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Valery Ochkov 6/6/2023 10:24:00 AM
#4 Posted: 6/6/2023 10:15:02 AM
Greetings,
That is a straight line on a semi-log graph; you can reference this handout: https://inside.mines.edu/~epoeter/_GW/LAB/EquationsOfStraightLinesOnDifferentTypesGraphPaper.pdf
Per this handout, your equation should be where:
May this be of Good Help;
⚜ Kenny Lemens, P.E. ᵂᴵ
WroteHow can I get a function from this plot? 🖼
That is a straight line on a semi-log graph; you can reference this handout: https://inside.mines.edu/~epoeter/_GW/LAB/EquationsOfStraightLinesOnDifferentTypesGraphPaper.pdf
Per this handout, your equation should be
y = b + m*log(x)
- m = difference in y over one log cycle of x
- b = y value corresponding to x=1
May this be of Good Help;
⚜ Kenny Lemens, P.E. ᵂᴵ
"No matter where you go, there you are." -Buckaroo BanzaiHotkeys: https://en.smath.com/forum/resource.ashx?a=45771&b=2
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Valery Ochkov 6/6/2023 10:24:00 AM
#5 Posted: 6/6/2023 12:44:34 PM
WroteHow can I get a function from this plot?
Hi. You can try this post Approximation of a functional curve in a digital image or this other one: Embedding images into a plot
Best regards.
Alvaro.
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#6 Posted: 6/6/2023 2:19:52 PM
WroteHow can I get a function from this plot ?
Hello Valery,
some Smath digitizing utilities
Cheers, Jean.
Digitize Tracer 15.sm (28.83 KiB) downloaded 249 time(s).
Digitize OVNI Copy.sm (69.15 KiB) downloaded 260 time(s).
Digitize Contour Isocurve Himmelblau Copy.sm (106.67 KiB) downloaded 247 time(s).
Digitize Curve.sm (295.86 KiB) downloaded 248 time(s).
Digitize Contour.sm (829.05 KiB) downloaded 252 time(s).
Digitize Clean_Strip_Smooth.sm (1.76 MiB) downloaded 250 time(s).
#7 Posted: 6/6/2023 3:29:30 PM
... this Himmelblau has resident Gray matrix.
Digitize Contour Isocurve Himmelblau Copy.sm (107.19 KiB) downloaded 252 time(s).
Digitize Contour Isocurve Himmelblau Copy.sm (107.19 KiB) downloaded 252 time(s).
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Valery Ochkov 6/7/2023 1:02:00 AM
#8 Posted: 6/6/2023 5:11:16 PM
Hi. Hope this helps.

Modeling a functional curve in a digital image.pdf (860.39 KiB) downloaded 269 time(s).
Modeling a functional curve in a digital image.sm (1 MiB) downloaded 276 time(s).
Best regards.
Alvaro.

Modeling a functional curve in a digital image.pdf (860.39 KiB) downloaded 269 time(s).
Modeling a functional curve in a digital image.sm (1 MiB) downloaded 276 time(s).
Best regards.
Alvaro.
3 users liked this post
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