exm050205.m

matlab电子书籍

clf;t=6*pi*(0:100)/100;
y=1-exp(-0.3*t).*cos(0.7*t);
plot(t,y,'r-','LineWidth',3)							 
hold on
tt=t(find(abs(y-1)>0.05));ts=max(tt);								
plot(ts,0.95,'bo','MarkerSize',10)	
hold off
axis([-inf,6*pi,0.6,inf])				
set(gca,'Xtick',[2*pi,4*pi,6*pi],'Ytick',[0.95,1,1.05,max(y)])	
set(gca,'XtickLabel',{'2*pi';'4*pi';'6*pi'})						
set(gca,'YtickLabel',{'0.95';'1';'1.05';'max(y)'})				
grid on
text(13.5,1.2,'\fontsize{12}{\alpha}=0.3')							%<13>
text(13.5,1.1,'\fontsize{12}{\omega}=0.7')							%<14>
cell_string{1}='\fontsize{12}\uparrow';								%<15>
cell_string{2}='\fontsize{16} \fontname{隶书}镇定时间';
cell_string{3}='\fontsize{6}  ';							
cell_string{4}=['\fontsize{14}\rmt_{s} = ' num2str(ts)];			%<18>
text(ts,0.85,cell_string,'Color','b','HorizontalAlignment','Center')																			%<19>
title('\fontsize{14}\it y = 1 - e^{ -\alpha t}cos{\omegat}')	%<20> 
xlabel('\fontsize{14} \bft \rightarrow')	%	
ylabel('\fontsize{14} \bfy \rightarrow')	%				 <22>