<><FONT size=1><b><EM>实例93:jacobi迭代法</EM></b></FONT></P><>h0=figure('toolbar','none',...
'position',[200 150 450 250],...
'name','实例93');
h1=axes('parent',h0,...
'position',[0.05 0.15 0.65 0.6],...
'visible','off');
I=imread('abmatrix.bmp','bmp');
image(I)
axis off
huidiao=[...
'a=[1 0 3 0;0 2 1 2;3 1 15 0;0 2 0 4;];,',...
'b=[1 6 5 8]'';,',...
'n=4;,',...
'u=zeros(n,1);,',...
'tic,',...
'[x,k]=jac(a,b,n,u);,',...
'time1=toc;,',...
'T=num2str(time1);,',...
'set(e1,''string'',[T,''秒'']);,',...
'set(e2,''string'',num2str(k));,',...
'msgbox([''X=['',num2str(x(1)),'' '',num2str(x(2)),'' '',num2str(x(3)),'','',num2str(x(4)),'']''],''方程组的解'');'];
t1=uicontrol('parent',h0,...
'units','points',...
'tag','t1',...
'style','text',...
'string','方程组如下:',...
'fontsize',15,...
'backgroundcolor',[0.75 0.75 0.75],...
'position',[20 150 100 20]);
e1=uicontrol('parent',h0,...
'units','points',...
'tag','e1',...
'style','edit',...
'horizontalalignment','right',...
'backgroundcolor',[1 1 1],...
'position',[295 130 35 20]);
t2=uicontrol('parent',h0,...
'units','points',...
'tag','t2',...
'style','text',...
'string','计算时间:',...
'fontsize',10,...
'backgroundcolor',[0.75 0.75 0.75],...
'position',[240 130 50 20]);
e2=uicontrol('parent',h0,...
'units','points',...
'tag','e2',...
'style','edit',...
'horizontalalignment','right',...
'backgroundcolor',[1 1 1],...
'position',[295 100 35 20]);
t2=uicontrol('parent',h0,...
'units','points',...
'tag','t2',...
'style','text',...
'string','迭代步数:',...
'fontsize',10,...
'backgroundcolor',[0.75 0.75 0.75],...
'position',[240 100 50 20]);
b1=uicontrol('parent',h0,...
'units','points',...
'tag','b1',...
'style','pushbutton',...
'string','Jacobi 迭代法',...
'backgroundcolor',[0.75 0.75 0.75],...
'position',[250 60 60 20],...
'callback',huidiao);
b2=uicontrol('parent',h0,...
'units','points',...
'tag','b2',...
'string','关闭',...
'style','pushbutton',...
'backgroundcolor',[0.75 0.75 0.75],...
'position',[250 30 60 20],...
'callback','close');</P> |