BIPVAL
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POLYFIT can fit a polynomial of given ORDer to vectorial data, using as independent variable data index, rescaled between -1 and 1. Similarly, BIPFIT fits a bipolynomial of given orders (a matrix) to matrix data.
POLYVAL can calculate the VALues of a POLYnomial on an equidistant abscissa x, scaled between -1 and 1. Then only length(x) counts.
Similarly, BIPVAL calculates the VALues of BIPolynomial as a matrix of user defined size. For smoothing perpouses, same size can be used as original data matrix, parent to the BIPolynomial:
BIP=randn(3,4);
BIP = 3*4 matrix (bipolynomial up to Y^2, X^3)
DAT=bipval(BIP,[100,150]);
Check:
bip=bipfit(DAT,2:3);
BIP-bip
Based on: POLYVAC
See also:
BIPFIT, SURFIT
Cite As
Vassili Pastushenko (2024). BIPVAL (https://www.mathworks.com/matlabcentral/fileexchange/6255-bipval), MATLAB Central File Exchange. Retrieved .
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- MATLAB > Mathematics > Elementary Math > Polynomials >
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Version | Published | Release Notes | |
---|---|---|---|
1.0.0.0 | Still improving summary, more logical consistency and standardization for complex matrices (.') |