欢迎光临~MATLAB代做|MATLAB代写|MATLAB有偿编程—谷速软件
语言选择: 中文版 ∷  英文版

新闻中心

matlab编程拉个朗日插值源码程序

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

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

'name','实例85');

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','拉格朗日插值',...

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

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

'callback',[...

'cla,',...

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

'n=str2num(strn);,',...

'i=1;,',...

'x=0:0.2:2*pi;,',...

'for t=0:0.2:2*pi,',...

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

'L(i)=lag(t,n);,',...

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

'end,',...

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

'legend(''sin(x)'',''插值函数'');,',...

'axis([0 7 -1.5 1.5])']);

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',[...

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

'n=str2num(strn);,',...

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

'm=str2num(strm);,',...

'dd=abs(sin(m)-lag(m,n));,',...

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

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

'units','points',...

'tag','e1',...

'style','edit',...

'fontsize',12,...

'string','5',...

'horizontalalignment','right',...

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

'position',[50 100 40 20]);

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

'units','points',...

'tag','e2',...

'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','阶数:',...

'fontsize',12,...

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

'position',[20 100 30 20]);

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

'units','points',...

'tag','t2',...

'style','text',...

'string','误差点:',...

'fontsize',12,...

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

'position',[160 100 40 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');

用手机扫描二维码关闭
二维码