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  Date Added: September 09, 2013  |  Visits: 211


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% function ynew=adsmoothdiff(dados,xnew,sdx,isdx,q,nmin)% written by Carlos J Dias%% ADAPTIVE DEGREE SAVISTZKY-GOLAY SMOOTHING AND DIFFERENTIATION% This function smooths and differentiates a sequence of numbers based on% an algorithm drawn on the ideas of Savistky and Golay and Barak.% 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 abscissa range of data to be used to find the least squares% polynomial% isdx - is a fraction of the sdx range between [0 1] where new y_values% for xnew will be calculated. It usually is 0.8 (i.e. 80%) of the sdx range.% q - is the highest degree of the polynomial to be used in the interpolation% nmin - is the minimum data points to be used in the interpolation.%% ALGORITHM:% For each point xnew_i of the xnew vector, this function finds the least% squares polynomial (with polyfit) passing through the experimental points% lying between [xnew_i - sdx, xnew_i + sdx].% The degree of the polynomial is chosen based on a F-statistic.% Using this polynomial it calculates, with polyval, the values for% y and its derivative in that same interpolating window.%% All calculated values for each abscissa are used to compute an average% value of the smoothed function and its derivative.% When sdx range includes fewer points than nmin, the range is enlarged to% include at least nmin points. This may occur more often 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%% DEMO SCRIPT (SMOOTHING OF 1000 POINTS)% x=linspace(-10,10,1000)';% y=1./(1+((x-2)/0.5).^2)+2./(1+((x+2)/0.5).^2);%two lorenztians% noise=0.5*(rand(length(y),1)-0.5);% y=y+noise;% ynew=adsmoothdiff([x y],x,1.1,0.8,11,15);% %(it takes about 30 s to run this script in my computer)%% P Barak, Analytical Chemistry 1995, 67 2758-2762% A Savitzky, MJE Golay, Analytical Chemistry 1964, 36(8) 1627-1638% I also acknowledge Jianwen Luo for drawing my attention to adaptive% strategies.

Requirements: No special requirements
Platforms: Matlab
Keyword: Enlarged Fewer Include Includes Nminq Occur Output Smoothed
Users rating: 0/10

License: Shareware Size: 10 KB
Travel  -  TouristGuideSriLanka
This is an app designed to deliver information about the places to visit in Sri Lanka. This app include includes information on Places to see, hotels, hospitals, wildlife, night life, banks embassies, vehicle hiring places and beaches in Sri...
26 MB  
Development Tools  -  Smoooth and Differentiate 1.0
% 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...
10 KB  
Musical Instrument Tools  -  Sothink Movie DVD Maker 1.0
Sothink Movie DVD Maker enables you to create DVDs from your video files. It can automatically convert popular video formats and either burn them to DVD, using the included burning engine, or save them as converted video files. The program also...
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Libraries  -  Text::Indent 0.1
Text::Indent is a simple indentation of text shared among modules. SYNOPSIS In your main program: use Text::Indent; my $indent = Text::Indent->new; $indent->spaces(2); In a module to produce indented output: use Text::Indent; my...
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Games  -  Gem Thief 1.0
Enter the combat arena as six nanobots clash, all striving to destroy their opponents and claim victory using nothing more than quick reaction and sheer brutality. Features Include: -* Includes 4 Individual Games.* Simultaneous 6 players option...
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Sotacs is a collection of components for the Tapestry Web Framework. Sotacs provides NavigationBar, a JavaScript-powered hierarchical navigation bar with collapsable folders, mouse-over highlighting, and selection highlighting. DynamicImage,...
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Network & Internet  -  Tapestry JSCookMenu 2.30
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Graphics Editors  -  iMagine Photo 2.1.4
iMagine Photo is a powerful tool for the automated processing of image files using AppleScript. Features include:Includes 7 Automator actions for processing image files.Comprehensive Exif supportDraw frames from imported moviesCreates image files...
Utilities  -  Batch Encoding Converter 3.1
Full conversion between more than 100 different encodings, like Unicode, ANSI, Latin, Cyrillic, ASCII, UTF8, and others lets you easily save multiple text files and strings in any encoding. Source encoding can be detected automatically, and...
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Audio Editors  -  iSkysoft iPod Movie Converter for Mac
iSkysoft iPod Movie Converter for Mac is an excellent converter which enables you to convet all popular video formats such as MPEG, AVI, MKV, WMV, MOV, FLV, MP4, 3GP, 3G2, TS/TP (for HD Video) and audio files to iPod video and audio including MP4,...
29.5 MB  
Scripts  -  Freelancer Script 5.05
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Post projects. Featured projects. Private projects. Sealed projects. Edit/delete projects. Select freelancers....
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Scripts  -  B2B Script 4.20
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Scripts  -  B2C Script 5.06
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Scripts  -  Social Networking Script 2.86
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Scripts  -  Business Networking Script 8.04
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Ajax based interface. Profile creation. Different types of profile. Profile for jobseekers, employers and employed...
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Development Tools  -  VMP Viewer 1.0
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Development Tools  -  Sending reports and timestamped file by emailing 1.0
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Development Tools  -  IrisMVC 2.0 rc1
IrisMVC is an OOP PHP framework that developers can use as a strong and secure foundation to build on various web applications following the Model-View-Controller (MVC) pattern. It provides the basic functionality developers need, without...
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Development Tools  -  7-Zip for Script 4.42
7-Zip is a file archiver with a high compression ratio.Features:- High compression ratio in new 7z format with LZMA compression- Supported formats:- Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR- Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM,...
624.64 KB  
Development Tools  -  Barnardextest 1.0
This file, as the Fisher's exact test, performs the exact probability test for a table of frequency data cross-classified according to two categorical variables, each of which has two levels or subcategories (2x2). It is a non-parametric...
10 KB