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AlgError | AlgLinearFit1D (int datSz, double *datXA, double *datYA, double *dstA, double *dstB, double *dstSigA, double *dstSigB, double *dstQ) |
| Computes the least squares best fit straight line (y = a + bx) through the given data, ie linear regression. This function is based on the function fit(): Press W. H., Teukolsky S. A., Vetterling W. T. and Flannery B. P, Numerical Recipies in C, 1992, CUP. More...
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AlgError | AlgLinearFitIdx1D (double *datXA, double *datYA, int *idxXA, int *idxYA, int idxASz, double *dstA, double *dstB, double *dstSigA, double *dstSigB, double *dstQ) |
| Computes the least squares best fit straight line (y = a + bx) through the given data, ie linear regression. More...
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AlgError | AlgPolynomialLSq (double *xVec, double *yVec, int vecSz, int polyDeg, double *cVec) |
| Attempts to fit a polynomial to the given data using a least squares approach. More...
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AlgError AlgLinearFit1D |
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int |
datSz, |
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double * |
datXA, |
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double * |
datYA, |
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double * |
dstA, |
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double * |
dstB, |
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double * |
dstSigA, |
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double * |
dstSigB, |
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double * |
dstQ |
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Computes the least squares best fit straight line (y = a + bx) through the given data, ie linear regression. This function is based on the function fit(): Press W. H., Teukolsky S. A., Vetterling W. T. and Flannery B. P, Numerical Recipies in C, 1992, CUP.
- Returns
- Error code.
- Parameters
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datSz | Number of elements in given data arrays array. |
datXA | Data array with 'x' values. |
datYA | Data array with 'y' values. |
dstA | Destination ptr for intercept 'a', may be NULL. |
dstB | Destination ptr for gradient 'b', may be NULL. |
dstSigA | Destination ptr for std dev of 'a', may be NULL. |
dstSigB | Destination ptr for std dev of 'b', may be NULL. |
dstQ | Destination ptr for goodness of fit, may be NULL. |
References ALG_ERR_FUNC, ALG_ERR_NONE, and AlgGammaP().
AlgError AlgPolynomialLSq |
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double * |
xVec, |
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double * |
yVec, |
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int |
vecSz, |
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int |
polyDeg, |
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double * |
cVec |
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Attempts to fit a polynomial to the given data using a least squares approach.
- Returns
- Error code.
- Parameters
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xVec | Data vector x of size vecSz. |
yVec | Data vector y of size vecSz. |
vecSz | Size of data vectors. |
polyDeg | Degree of ploynomial. |
cVec | Destination vector for the polynomial coefficients, which must have at least polyDeg + 1 elements. |
References AlcFree(), AlcMalloc(), ALG_DBG, ALG_DBG_LVL_1, ALG_DBG_LVL_FN, ALG_ERR_FUNC, ALG_ERR_MALLOC, AlgMatrixGaussSolve(), AlgMatrixRectFree(), AlgMatrixRectNew(), _AlgMatrixRect::array, _AlgMatrix::core, and _AlgMatrix::rect.