diff --git a/c5_5_11.m b/c5_5_11.m
new file mode 100644
index 0000000..99202f9
--- /dev/null
+++ b/c5_5_11.m
@@ -0,0 +1,6 @@
+x=-1:1;
+y=[1,2,3,4,5;1,2,1,2,1;5,4,3,2,1];
+subplot(1,2,1);bar(x,y,'grouped');
+title('Grouped');axis([-3,3,0,6]);
+subplot(1,2,2);barh(x,y,'stacked');
+title('Stack');
\ No newline at end of file
diff --git a/c5_5_13.m b/c5_5_13.m
new file mode 100644
index 0000000..8056724
--- /dev/null
+++ b/c5_5_13.m
@@ -0,0 +1,4 @@
+y=randn(500,1);
+theta=y*pi;
+rose(theta);
+title('再极坐标下的直方图');
\ No newline at end of file
diff --git a/c5_5_14.m b/c5_5_14.m
new file mode 100644
index 0000000..3df4054
--- /dev/null
+++ b/c5_5_14.m
@@ -0,0 +1,3 @@
+pie([7,17,23,19,5],[0,0,0,0,1]);
+title('饼图');
+legend('优秀','良好','中等','及格','不及格');
\ No newline at end of file
diff --git a/c5_5_15.m b/c5_5_15.m
new file mode 100644
index 0000000..445d21d
--- /dev/null
+++ b/c5_5_15.m
@@ -0,0 +1,6 @@
+t=0:2*pi/8:2*pi;
+t=[t,t(1)];
+x=sin(t);
+y=cos(t);
+fill(x,y,'r');
+axis equal;axis([-1.5,1.5,-1.5,1.6])
\ No newline at end of file
diff --git a/c5_5_16.m b/c5_5_16.m
new file mode 100644
index 0000000..f1abbb3
--- /dev/null
+++ b/c5_5_16.m
@@ -0,0 +1,8 @@
+x=0:0.35:7;
+y=2*exp(-0.5*x);
+subplot(1,3,1);scatter(x,y,'green');
+title('scatter(x,y,''green'')');axis([0,7,0,2]);
+subplot(1,3,2);stairs(x,y,'b');
+title('stairs(x,y,''b'')');axis([0,7,0,2]);
+subplot(1,3,3);stem(x,y,'k');
+title('stem(x,y,''k'')');axis([0,7,0,2]);
\ No newline at end of file
diff --git a/c5_5_17.m b/c5_5_17.m
new file mode 100644
index 0000000..8d3ce1a
--- /dev/null
+++ b/c5_5_17.m
@@ -0,0 +1,8 @@
+x=-pi:pi/8:pi;
+y=sin(x);
+subplot(2,2,1);compass(x,y);
+title('罗盘图');
+subplot(2,2,2);feather(x,y);
+title('羽毛图');
+subplot(2,1,2);quiver(x,y);
+title('箭头图');
\ No newline at end of file
diff --git a/c5_5_18.m b/c5_5_18.m
new file mode 100644
index 0000000..dea0a5b
--- /dev/null
+++ b/c5_5_18.m
@@ -0,0 +1,8 @@
+t=0:pi/50:2*pi;
+x=8*cos(t);
+y=4*sqrt(2)*sin(t);
+z=-4*sqrt(2)*sin(t);
+plot3(x,y,z,'p');
+title('Line in 3-D Space');
+text(0,0,0,'origin');
+xlabel('X'),ylabel('Y'),zlabel('Z');grid;
\ No newline at end of file
diff --git a/c5_5_20.m b/c5_5_20.m
new file mode 100644
index 0000000..f83d0f3
--- /dev/null
+++ b/c5_5_20.m
@@ -0,0 +1,12 @@
+x=0:0.1:2*pi;
+[x,y]=meshgrid(x);
+z=sin(y).*cos(x);
+subplot(2,2,1);mesh(x,y,z);
+xlabel('x-axis'),ylabel('y-axis'),zlabel('z-axis');
+title('mesh');
+subplot(2,2,2);surf(x,y,z);
+xlabel('x-axis'),ylabel('y-axis'),zlabel('z-axis');
+title('surf');
+subplot(2,1,2);plot3(x,y,z);
+xlabel('x-axis'),ylabel('y-axis'),zlabel('z-axis');
+title('plot3');
diff --git a/c5_5_21.m b/c5_5_21.m
new file mode 100644
index 0000000..00d0b86
--- /dev/null
+++ b/c5_5_21.m
@@ -0,0 +1,18 @@
+m=30;
+z=1.2*(0:m)/m;
+r=ones(size(z));
+theta=(0:m)/m*pi*2;
+x1=r'*cos(theta);
+y1=r'*sin(theta);
+z1=z'*ones(1,m+1);
+x=(-m:2:m)/m;
+x2=x'*ones(1,m+1);
+y2=r'*cos(theta);
+z2=r'*sin(theta);
+surf(x1,y1,z1);
+axis equal,axis off;
+hold on;
+surf(x2,y2,z2);
+axis equal,axis off;
+title('两个圆柱体相交图形');
+hold off;
\ No newline at end of file
diff --git a/c5_5_22.m b/c5_5_22.m
new file mode 100644
index 0000000..64ccf79
--- /dev/null
+++ b/c5_5_22.m
@@ -0,0 +1,13 @@
+[x,y] = meshgrid(-10:0.2:10);
+z1 = (x.^2-2*y.^2) + eps;
+a=input('a=?');
+z2=a*ones(size(x));
+subplot(1,2,1);
+mesh(x,y,z1);hold on;mesh(x,y,z2);
+v=[-10,10,-10,10,-100,100];axis(v);grid;
+hold off
+r0=abs(z1-z2)<=1;
+xx=r0.*x;yy=r0;zz=r0.*z2;
+subplot(1,2,2);
+plot3(xx(r0~=0),yy(r0~=0),zz(r0~=0),'*');
+axis(v);grid;
\ No newline at end of file
diff --git a/c5_5_23.m b/c5_5_23.m
new file mode 100644
index 0000000..f84d339
--- /dev/null
+++ b/c5_5_23.m
@@ -0,0 +1,14 @@
+[x,y]=meshgrid(-8:0.5:8);
+z=sin(sqrt(x.^2+y.^2));
+subplot(2,2,1);
+meshc(x,y,z);
+title('meshc(x,y,z)');
+subplot(2,2,2);
+meshz(x,y,z);
+title('meshz(x,y,z)');
+subplot(2,2,3);
+surfc(x,y,z);
+title('surfc(x,y,z)');
+subplot(2,2,4);
+surfl(x,y,z);
+title('surfl(x,y,z)');
\ No newline at end of file
diff --git a/c5_5_24.m b/c5_5_24.m
new file mode 100644
index 0000000..8540bd9
--- /dev/null
+++ b/c5_5_24.m
@@ -0,0 +1,5 @@
+t=0:pi/20:2*pi;
+[x,y,z]=cylinder(2+sin(t),30);
+subplot(1,3,1);surf(x,y,z);
+[x,y,z]=sphere;
+subplot(1,3,1);surf(x,y,z);
\ No newline at end of file
diff --git a/c_5_5_12.m b/c_5_5_12.m
new file mode 100644
index 0000000..d641a85
--- /dev/null
+++ b/c_5_5_12.m
@@ -0,0 +1,6 @@
+y=randn(500,1);
+subplot(1,2,1);
+hist(y);title('高斯分布直方图');
+x=-4:0.1:4;
+subplot(1,2,2)
+hist(y,x);title('指定范围的高斯分布直方图');
\ No newline at end of file
diff --git a/p121.m b/p121.m
new file mode 100644
index 0000000..09e7d2a
--- /dev/null
+++ b/p121.m
@@ -0,0 +1,5 @@
+x=1:2:9;
+y=[1,3,5,2,6;2,4,5,6,2;5,4,7,2,2]';
+area(x,y);
+grid on;
+title('面积统计图');
diff --git a/plotxy11.m b/plotxy11.m
new file mode 100644
index 0000000..9f73c55
--- /dev/null
+++ b/plotxy11.m
@@ -0,0 +1,5 @@
+x = 0:0.1:4*pi;
+plot(x,sin(x)+sin(3*x));
+set(gca,'ytick',[-1,-0.3,0.1,1]);
+set(gca,'yticklabel',{'极小','临界值','崩溃值','极大'});
+grid on;
\ No newline at end of file
diff --git a/plotxy13.m b/plotxy13.m
new file mode 100644
index 0000000..aeaee33
--- /dev/null
+++ b/plotxy13.m
@@ -0,0 +1,5 @@
+x=0:0.1:4*pi;
+subplot(2,2,1);plot(x,sin(x));
+subplot(2,2,2);plot(x,cos(x));
+subplot(2,2,3);plot(x,sin(x).*exp(-x/5));
+subplot(2,2,4);plot(x,x.^2);
\ No newline at end of file
diff --git a/plotxy14.m b/plotxy14.m
new file mode 100644
index 0000000..2a4c065
--- /dev/null
+++ b/plotxy14.m
@@ -0,0 +1,7 @@
+t=0:0.1:2*pi;
+x=3*cos(t);
+y=sin(t);
+subplot(2,2,1);plot(x,y);axis normal
+subplot(2,2,2);plot(x,y);axis square
+subplot(2,2,3);plot(x,y);axis equal
+subplot(2,2,4);plot(x,y);axis equal tight
\ No newline at end of file
diff --git a/plotxy15.m b/plotxy15.m
new file mode 100644
index 0000000..5c8b1c1
--- /dev/null
+++ b/plotxy15.m
@@ -0,0 +1,8 @@
+x=0:0.1:2*pi;
+y1=sin(x);
+y2=exp(-x);
+plot(x,y1,'--*',x,y2,':o');
+xlabel('t = 0 to 2\pi');
+ylabel('values of sin(t) and e^{-x}');
+title('Function Plots of sin(t) and e^{x}');
+legend('sin(t)','e^{-x}');
\ No newline at end of file
diff --git a/plotxy16.m b/plotxy16.m
new file mode 100644
index 0000000..42834a0
--- /dev/null
+++ b/plotxy16.m
@@ -0,0 +1,4 @@
+x=0:0.1:2*pi;
+plot(x,sin(x),x,cos(x));
+text(pi/4,sin(pi/4),'\leftarrow sin(q\pi/4)=0.707');
+text(5*pi/4,cos(5*pi/4),'cos(5\pi/4) = -0.707 \rightarrow','HorizontalAlignment','right');
\ No newline at end of file
diff --git a/plotxy20.m b/plotxy20.m
new file mode 100644
index 0000000..0f7eaa8
--- /dev/null
+++ b/plotxy20.m
@@ -0,0 +1,3 @@
+x=randn(10000,1);
+hist(x,25);
+set(findobj(gca,'type','patch'),'edgecolor','w');
\ No newline at end of file
diff --git a/plotxyz01.m b/plotxyz01.m
new file mode 100644
index 0000000..6aa3b4a
--- /dev/null
+++ b/plotxyz01.m
@@ -0,0 +1,5 @@
+x=linspace(-2,2,25);
+y=linspace(-2,2,25);
+[xx,yy]=meshgrid(x,y);
+zz=xx.*exp(-xx.^2-yy.^2);
+surf(xx,yy,zz);
\ No newline at end of file
diff --git a/plotxyz03.m b/plotxyz03.m
new file mode 100644
index 0000000..7b74298
--- /dev/null
+++ b/plotxyz03.m
@@ -0,0 +1,3 @@
+[x,y,z]=peaks;
+meshz(x,y,z);
+axis tight
\ No newline at end of file
diff --git a/plotxyz05.m b/plotxyz05.m
new file mode 100644
index 0000000..d3727ee
--- /dev/null
+++ b/plotxyz05.m
@@ -0,0 +1,3 @@
+[x,y,z]=peaks;
+meshc(x,y,z);
+axis tight
\ No newline at end of file
diff --git a/plotxyz091.m b/plotxyz091.m
new file mode 100644
index 0000000..6499d87
--- /dev/null
+++ b/plotxyz091.m
@@ -0,0 +1,4 @@
+subplot(2,2,1);ezmesh('sin(x)/x*sin(y)/y');
+subplot(2,2,2);ezsurf('sin(x*y)/(x*y)');
+subplot(2,2,3);ezmeshc('sin(x)/x*sin(y)/y');
+subplot(2,2,4);ezsurfc('sin(x*y)/(x*y)');
\ No newline at end of file
diff --git a/ployxyz011.m b/ployxyz011.m
new file mode 100644
index 0000000..f658c98
--- /dev/null
+++ b/ployxyz011.m
@@ -0,0 +1,14 @@
+x = 3 : 6;
+y = 5 : 9;
+[xx,yy]=meshgrid(x,y);
+zz=xx.*yy;
+subplot(2,2,1);mesh(xx);
+title('xx');axis tight
+subplot(2,2,2);mesh(yy);
+title('yy');axis tight
+subplot(2,2,3);mesh(xx,yy,zz);
+title('zz对xx及yy作图');axis tight
+subplot(2,2,4);mesh(zz);
+title('zz');axis tight
+
+colormap(zeros(1,3));
\ No newline at end of file