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matlab编程三次样条插值法源码程序

h0=figure('toolbar','none',...

'position',[200 50 350 450],...

'name','实例86');

h1=axes('parent',h0,...

'position',[0.10 0.45 0.8 0.5],...

'visible','off');

x=0:0.2:2*pi;

y=sin(x);

plot(x,y)

b1=uicontrol('parent',h0,...

'units','points',...

'tag','b1',...

'style','pushbutton',...

'string','三次样条插值',...

'backgroundcolor',[0.75 0.75 0.75],...

'position',[20 60 70 20],...

'callback',[...

'y=0,',...

'sy=0,',...

'strn1=get(e2,''string'');,',...

'n1=str2num(strn1);,',...

'strn2=get(e3,''string'');,',...

'n2=str2num(strn2);,',...

'x=n1:0.2:n2;,',...

'i=1;,',...

'for t=n1:0.2:n2,',...

'y(i)=sin(t);,',...

'sy(i)=san(t,n1,n2);,',...

'i=i+1;,',...

'end,',...

'plot(x,y,''b*'',x,sy,''r-''),',...

'axis([0 7 -1.5 1.5]),',...

'legend(''sin(x)'',''N-Hermite插值'')']);

b2=uicontrol('parent',h0,...

'units','points',...

'tag','b2',...

'style','pushbutton',...

'string','误差比较',...

'backgroundcolor',[0.75 0.75 0.75],...

'position',[170 60 70 20],...

'callback',[...

'strdn1=get(e2,''string'');,',...

'n1=str2num(strdn1);,',...

'strdn2=get(e3,''string'');,',...

'n2=str2num(strdn2);,',...

'strdn=get(e1,''string'');,',...

'dn=str2num(strdn);,',...

'dd=abs(sin(dn)-san(dn,n1,n2));,',...

'msgbox([''误差为:'',num2str(dd)],''计算结果'')']);

e1=uicontrol('parent',h0,...

'units','points',...

'tag','e1',...

'style','edit',...

'fontsize',12,...

'string','1.20',...

'horizontalalignment','right',...

'backgroundcolor',[1 1 1],...

'position',[200 100 40 20]);

t1=uicontrol('parent',h0,...

'units','points',...

'tag','t1',...

'style','text',...

'string','误差点:',...

'fontsize',12,...

'backgroundcolor',[0.75 0.75 0.75],...

'position',[160 100 40 20]);

e2=uicontrol('parent',h0,...

'units','points',...

'tag','e2',...

'style','edit',...

'fontsize',12,...

'string','1.00',...

'horizontalalignment','right',...

'backgroundcolor',[1 1 1],...

'position',[20 85 40 20]);

t2=uicontrol('parent',h0,...

'units','points',...

'tag','t2',...

'style','text',...

'string','第一节点:',...

'fontsize',12,...

'backgroundcolor',[0.75 0.75 0.75],...

'position',[15 105 50 20]);

e3=uicontrol('parent',h0,...

'units','points',...

'tag','e3',...

'style','edit',...

'fontsize',12,...

'string','3.00',...

'horizontalalignment','right',...

'backgroundcolor',[1 1 1],...

'position',[100 85 40 20]);

t3=uicontrol('parent',h0,...

'units','points',...

'tag','t3',...

'style','text',...

'string','第二节点:',...

'fontsize',12,...

'backgroundcolor',[0.75 0.75 0.75],...

'position',[95 105 50 20]);

b3=uicontrol('parent',h0,...

'units','points',...

'tag','b3',...

'style','pushbutton',...

'string','关闭',...

'backgroundcolor',[0.75 0.75 0.75],...

'position',[100 20 60 20],...

'callback','close');


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