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# Smoooth and Differentiate (Scripts) 1.0

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## Smoooth and Differentiate (Scripts) Publisher's description

### function ynew=smoothdiff(dados,xnew,sdx,q,nmin)

% function ynew=smoothdiff(dados,xnew,sdx,q,nmin)
%
% This function smoothes and differentiates a sequence of numbers based on
% an algorithm similar to Savistky and Golay. There are no restrictions
% however, on the number of points or on their spacing.
% This function also calculates the first derivative at the xnew points
%
% INPUT:
% dados - data in a two column matrix (first column x; second column y)
% xnew - is a vector where new ordinates are to be computed
%
% sdx - is the range of data to be used in the interpolation
% nmin - is the minimum data points to be used in the interpolation.
% q - is the degree of the polynomial to be used in the interpolation
%
% When sdx range includes fewer points than nmin the range is
% enlarged to include at least nmin points. This occurs mainly at the edges
% of the data.
% Note that we should have nmin>q
%
% OUTPUT (ynew - 5 column matrix)
% column 1- new abscissas
% column 2- new ordinates
% column 3- their standard error
% column 4- first derivative
% column 5- no. of values that were calculated for the ith point

#### System Requirements:

MATLAB 7.11 (2010b)
Program Release Status: New Release
Program Install Support: Install and Uninstall

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