号令行键入:
% Define the mesh
x = 0:0.16:5;
y = 0:0.16:5;
[xx,yy] = meshgrid(x,y);
% The plot
zz = xx.^yy-yy.^xx;
h = surf(x,y,zz);
% Set the properties of the plot
h.EdgeColor = [0.7 0.7 0.7];
view(20,50);
colormap(hsv);
title('z = x^y-y^x');
xlabel('x');
ylabel('y');
hold on;
按“Enter”键。
如图1所示。
号令行键入:
c = contourc(x,y,zz,[0 0]);
list1Len = c(2,1);
xContour = [c(1,2:1+list1Len) NaN c(1,3+list1Len:size(c,2))];
yContour = [c(2,2:1+list1Len) NaN c(2,3+list1Len:size(c,2))];
% Note that the NAN above prevents the end of the first contour line from being
% connected to the beginning of the second line
line(xContour,yContour,'Color','k');
按“Enter”键。
如图2所示。
号令行键入:
plot([0:5 2 4],[0:5 4 2],'r.','MarkerSize',25);
按“Enter”键。
如图3所示。
号令行键入:
e = exp(1);
plot([e pi],[pi e],'r.','MarkerSize',25);
plot([e pi],[pi e],'y.','MarkerSize',10);
text(e,3.3,'(e,pi)','Color','k', ...
'HorizontalAlignment','left','VerticalAlignment','bottom');
text(3.3,e,'(pi,e)','Color','k','HorizontalAlignment','left',...
'VerticalAlignment','bottom');
hold off;
按“Enter”键。
如图4所示。
号令行键入:
e = exp(1);
e^pi
pi^e
按“Enter”键。
如图5所示。
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