Curve-Fit 4+
Bjarne Berge
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- 무료
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설명
'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.
새로운 기능
버전 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)
앱이 수집하는 개인정보
Bjarne Berge 개발자가 개인정보 처리방침 및 데이터 처리 방식에 관한 세부사항을 Apple에 제공하지 않았습니다. 자세한 내용은 개발자의 개인정보 처리방침을 참조하십시오.
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정보
- 제공자
- Bjarne Berge
- 크기
- 809KB
- 카테고리
- 유틸리티
- 호환성
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- iPhone
- iOS 12.3 이상 필요.
- iPad
- iPadOS 12.3 이상 필요.
- iPod touch
- iOS 12.3 이상 필요.
- Mac
- macOS 11.0 이상 및 Apple M1 칩 이상이 탑재된 Mac이 필요.
- Apple Vision
- visionOS 1.0 이상 필요.
- 언어
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영어
- 연령 등급
- 4+
- 저작권
- © Bjarne Berge
- 가격
- 무료
- 앱 내 구입
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- Curve-Fit ₩4,400