pp2sp.m

演示matlab曲线拟和与插直的基本方法

% PP2SP   pp-宆偐傜B-宆偵曄姺
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% PP2SP(PP) 偼丄PP 偵娷傑傟傞pp-宆偺僗僾儔僀儞偺B-宆傪弌椡偟傑偡丅
% 偦傟偧傟偺撪晹僽儗乕僋億僀儞僩傪墶愗傞暯妸壔忦審偺悢偼丄TOL = 1.e-12 
% 偲偟偰旝暘偺抣傪TOL攞偟偨傕偺偲斾妑偝傟偨丄撪晹僽儗乕僋億僀儞僩傪墶愗傞
% 旝暘偺旘傃偺戝偒偝偐傜悇掕偝傟傑偡丅
%
% PP2SP(PP,SCONDS) 偼丄埲壓偺曽朄偱丄偄偔偮偐偺偦偺懠偺忣曬傪採嫙偟傑偡丅
% 0<SCONDS(1)<1 偺応崌丄SCONDS(1) 偼丄TOL 偲偟偰巊傢傟傑偡丅
% SCONDS 偑惓偟偄挿偝偺旕晧偺惍悢偺楍偱偁傞応崌丄B-宆偵懳偡傞愡揰楍偼丄
% 偡傋偰偺 i 偵偮偄偰丄i斣栚偺 *interior* 偺僽儗乕僋億僀儞僩傪墶愗傞暯妸壔
% 忦審 SCONDS(i) 偑偁傞傕偺偲偟偰慖戰偝傟傑偡丅
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% 岆嵎傪娵傔傞偙偲偵傛偭偰丄寢壥偺宆偼丄偮偓偺傛偆偵摼傜傟偨(摿掕偺慖戰
% 偝傟偨僒僀僩傪曗娫偡傞偨傔偵丄憡摉懡偔偺寁嶼検偲側傝丄傑偨惉岟偺曐徹偑
% 愨懳偱偼側偄)傕偺偲摨堦偵側傝傑偡丅
%
% breaks= ppbrk(PP,'breaks'); l = ppbrk(PP,'l');
% knots = augknt(breaks,k,k-SCONDS);
% points = aveknt(knots,k);
% SP = spapi(knots,points,fnval(PP,points));
%
% PP 偑m曄悢僗僾儔僀儞傪娷傓応崌丄SCONDS 偼傕偟梌偊傜傟傞側傜丄挿偝 m 偺
% 僙儖攝楍偱偁傞偙偲偑梫媮偝傟傑偡丅
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% 椺偊偽丄
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%      p0 = ppmak([0 1],[3 0 0]); p1 = sp2pp(pp2sp(pprfn(p0,[.4 .6])));
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% 偼丄僗僾儔僀儞偑 PPRFN 偵傛偭偰庢傝崬傑傟傞晅壛揑側僽儗乕僋億僀儞僩傪
% 墶愗傞擟堄偺旝暘偱晄楢懕偱側偄偨傔丄(娵傔傑偱) p0 偲堦抳偡傞 p1 傪
% 梌偊傑偡丅備偊偵 PP2SP 偼丄偙傟傜偺晅壛揑側僽儗乕僋億僀儞僩傪柍帇偟丄
% 偦偟偰丄SP2PP 偼丄(僗僾儔僀儞偺婎杮嬫娫偺嵟屻偺揰偱 PP2SP 偵傛偭偰
% 庢傝崬傑傟偨愡揰偺懡廳搙偺傛偆偵偼)擟堄偺愡揰偺懡廳搙傪曐偪傑偣傫丅
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% 嶲峫 : FN2FM, SP2PP, SP2BB.


%   Copyright 1987-2003 C. de Boor and The MathWorks, Inc.