Curve-Fit 4+
Bjarne Berge
Entwickelt für iPad
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- Gratis
- In-App-Käufe möglich
Screenshots
Beschreibung
'CurveFit' uses regression analysis by the method of least squares to find best fit for a set of data to a selected equation.
The curve-fitting technique used in this app is based on regression analysis by the method of least squares. The free version fits a straight line through a data-set using least squares analysis.
One In-App purchase is required to fit the other equations to the data set:
Straight Line : Y = C0 + C1*X (free)
Power Curve : Y = C0 + X^C1 Exponential I : Y = C0 * EXP(C1*X)
Exponential II : Y = C0 * X * EXP(C1*X)
Hyperbolic : Y = (C0 + C1*X)/(1 - C2*X)
Square Root : Y = C0 + C1*SQRT(X)
Polynomial : Y = C0 + C1*X + --- + CN*X^N
Exponential Poly : Y = C0 * EXP(C1*X + --- +
Natural Log : Y = C0 + C1*(LN(X)) + --- +
Reciprocal : Y = C0 + C1/X + --- + CN/X^N
Most literature deals with least squares analysis for straight lines, 2nd degree polynomials, and functions that can be linearized. The input-data is transformed into a format that the can be put into linear forms with undetermined constants. These types of equations are applicable for least-squares regression.
The regression routine is needed for determining values for the set of unknown quantities C1, C2,- - - ,Cm in the equation:
Y = C1 x F1(X) + C2 x F2(X) + - - - + Cm x Fm(X)
The constants are determined to minimize the sum of squares of the differences between the measured values (Y1, Y2, - - - , Yn) and the predicted equation Yc = F(X) which is found by curve-fitting the given data.
The principle of least squares is to find the values for the unknowns C1 through Cm that will minimize the sum of the squares of the residuals:
n
∑(ri) = r12 + r22 + - - - + rn2 = minimum
i=1
This is done by letting the derivative of the above equation equal zero. Thereby there will be generated as many algebraic equations as given data points, and the number of equations will be larger than unknowns.
Neuheiten
Version 6.0
Upgraded to latest IOS SDK
Minor Bug-fixes
Added 'Share' button to enable sharing, saving and printing of graph/data
Changed color-scheme to work in Dark Mode
Updated layout and fonts to work better with iPads (larger fonts/better layout)
App-Datenschutz
Der Entwickler, Bjarne Berge, hat Apple keine Details über die eigenen Datenschutzrichtlinien und den Umgang mit Daten bereitgestellt. Weitere Informationen findest du in den Datenschutzrichtlinien des Entwicklers.
Keine Details angegeben
Der Entwickler muss bei der Übermittlung seiner nächsten App-Aktualisierung Angaben zum Datenschutz machen.
Informationen
- Anbieter
-
Bjarne Berge hat sich als Händler für diese App ausgewiesen und bestätigt, dass dieses Produkt oder diese Dienstleistung dem Recht der Europäischen Union entspricht.
- Adresse
- 15 Kershaw Place St. John's Newfoundland and Labrador A1A 5M5 Kanada
- Telefonnummer
- +1 6052158650
- oilgasapp@gmail.com
- Größe
- 809 KB
- Kategorie
- Dienstprogramme
- Kompatibilität
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- iPhone
- Erfordert iOS 12.3 oder neuer.
- iPad
- Erfordert iPadOS 12.3 oder neuer.
- iPod touch
- Erfordert iOS 12.3 oder neuer.
- Mac
- Erfordert macOS 11.0 (oder neuer) und einen Mac mit Apple M1-Chip (oder neuer).
- Apple Vision
- Erfordert visionOS 1.0 oder neuer.
- Sprachen
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Englisch
- Alter
- 4+
- Copyright
- © Bjarne Berge
- Preis
- Gratis
- In‑App‑Käufe
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- Curve-Fit 2,99 €