diff --git a/difun.m b/difun.m
new file mode 100644
index 0000000..8a1b267
--- /dev/null
+++ b/difun.m
@@ -0,0 +1,8 @@
+function y=difun(x)
+if x<-pi
+    y=-x-pi
+elseif x>-pi && x<pi
+    y=sin(x)
+else
+    y=(x-pi)/2
+end
\ No newline at end of file
diff --git a/dms2mat.m b/dms2mat.m
new file mode 100644
index 0000000..b67e652
--- /dev/null
+++ b/dms2mat.m
@@ -0,0 +1,7 @@
+function dmsv=dms2mat(dv)
+[l,c]=size(dv);
+for i=1:l
+    dmsv(i,1)=fix(dv);
+    dmsv(i,2)=fix((dv-fix(dv))*60);
+    dmsv(i,3)=(dv-dmsv(i,1)-dmsv(i,2)*60);
+end
\ No newline at end of file
diff --git a/dms2rad.m b/dms2rad.m
new file mode 100644
index 0000000..18157ec
--- /dev/null
+++ b/dms2rad.m
@@ -0,0 +1,2 @@
+function radv=dms2rad(dms)
+radv=dms*pi/180;
\ No newline at end of file
diff --git a/jianjiepingcha.m b/jianjiepingcha.m
new file mode 100644
index 0000000..db0e03c
--- /dev/null
+++ b/jianjiepingcha.m
@@ -0,0 +1,23 @@
+disp('水准网间接平差')
+disp('已知高程')
+Ha=5.015
+Hb=6.016
+disp('观测高差（m）')
+L=[1.359;2.009;0.363;1.012;0.657;-0.357]
+disp('系数矩阵')
+B=[1,0;0,1;1,0;0,1;-1,1;-1,0]
+l=[0;0;4;3;7;2]
+disp('C:')
+C=1*ones(1,6);
+S=[1.1,1.7,2.3,2.7,2.4,4.0]
+P=C./S
+P=diag(P)
+disp('参数的解')
+x=inv(B'*P*B)*B'*P*L
+disp('wucha')
+V=B*x-l
+L1=L+V/1000
+disp('jingdu')
+n=6;
+t=2;
+delta=sqrt(V'*P*V/(n-t))
\ No newline at end of file
diff --git a/jjpc.m b/jjpc.m
new file mode 100644
index 0000000..f397d6d
--- /dev/null
+++ b/jjpc.m
@@ -0,0 +1,11 @@
+function [csgz,qxx,dert0,dlj]=jjpc(bb,ll,pp)
+pn=diag(pp);
+nbb=bb'*pn*bb;
+ww=bb'*pn*ll;
+qxx=inv(nbb);
+csgz=qxx*ww;
+vv=bb*csgz-ll;
+vtpv=ll'*pn*ll-ww'*csgz;
+[rr,nn]=size(bb);
+dert0=sqrt(vtpv/rr);
+dlj=der0*dert0*bb*qxx*bb';
\ No newline at end of file
diff --git a/jjpcs.m b/jjpcs.m
new file mode 100644
index 0000000..2dc420c
--- /dev/null
+++ b/jjpcs.m
@@ -0,0 +1,3 @@
+bbb=[]
+lll=[]
+quan=[]
diff --git a/lab1.m b/lab1.m
new file mode 100644
index 0000000..e086bbd
--- /dev/null
+++ b/lab1.m
@@ -0,0 +1,13 @@
+a=[2,3,6,7;4,2,8,6;3,6,9,2;4,7,9,3]
+a1=a([1:3],[2:3])
+a2=a(2,3)
+zeros(3,4)
+ones(5)
+eye(3)
+rand(4)
+randn(3)
+% 删除行列
+a(:,[3])=[]
+% 增加元素和列
+a(5,6)=45
+a(:,4)=[90,89,34,56,98]
\ No newline at end of file
diff --git a/lab1/exercise1.m b/lab1/exercise1.m
new file mode 100644
index 0000000..869105a
--- /dev/null
+++ b/lab1/exercise1.m
@@ -0,0 +1,59 @@
+% 练习1
+x=linspace(-pi,pi,21)
+y=sin(x)
+% 练习2
+clear
+k=1:1000;
+kk=1./k;
+kkk=kk./k;
+res=sum(kkk)-(pi^2)/6
+% 练习3
+sum(kk-log(1000))
+% 练习4
+clear
+a=rand(2,3)
+x=a(1,:)
+y=a(2,:)
+norm(x)
+norm(y)
+acos(dot(x,y)/norm(x)/norm(y))
+% 练习5
+clear
+rand(3)
+det(ans)  % 线性无关
+% 练习6
+clear
+a=rand(3,2)
+x=a(1,:)
+y=a(2,:)
+z=a(3,:)
+alpha=x-z
+beta=y-z
+alpha=[alpha 0]
+beta=[beta 0]
+cross(alpha,beta)
+% 练习7
+clear
+a=11:19
+b=a
+for k=1:8
+    b=[b;a+10*k];
+end
+rank(b)
+% 练习8
+y=[]
+for x=-6:0.05:6
+    y=[y difun(x)];
+end
+plot(x,y)
+plot([-6:0.05:6],y)
+% 练习9
+A=[6,2,1,-1;2,4,1,0;1,1,4,-1;-1,0,-1,3];
+b=[6;1;5;-5]
+x=A\b
+% 练习10
+[diag(1:4) eye(4)]
+% 练习11
+num2p(123453656345)
+% 练习12
+ttry(100)
\ No newline at end of file
diff --git a/lab2/dtor.m b/lab2/dtor.m
new file mode 100644
index 0000000..35a6c3c
--- /dev/null
+++ b/lab2/dtor.m
@@ -0,0 +1,7 @@
+% 度分秒转弧度
+function jrad=dtor(deg)
+degd=fix(deg);
+degf=(deg-degd)*100;
+degm=fix(degf);
+degs=(degf-degm)/36.0;
+jrad=(degd+degm*60.00+degs)*pi/180;
\ No newline at end of file
diff --git a/lab2/exercise2.m b/lab2/exercise2.m
new file mode 100644
index 0000000..c02da2e
--- /dev/null
+++ b/lab2/exercise2.m
@@ -0,0 +1,25 @@
+% 练习2第1-4题
+% 1
+A=[6,9,3;2,7,5];
+B=[2,4,1;4,6,8];
+A+B
+A*B
+A*B'
+
+% 2
+clear
+A=[3,2,0,1,5];
+roots(A)
+
+% 3
+clear
+A = [4,9,2;7,6,4;3,5,7];
+B = [37;26;28];
+A\B
+
+% 4
+syms x
+f = 3*x^4-12*x^3-5*x+9;
+int (f,x)
+diff(f,x)
+int(f,x,0,2)
diff --git a/lab2/exercise2.mlx b/lab2/exercise2.mlx
new file mode 100644
index 0000000..ffb6f40
Binary files /dev/null and b/lab2/exercise2.mlx differ
diff --git a/lab2/exercise2_5.m b/lab2/exercise2_5.m
new file mode 100644
index 0000000..0fe85fe
--- /dev/null
+++ b/lab2/exercise2_5.m
@@ -0,0 +1,14 @@
+% 练习2第五题
+subplot(1,2,1)
+t=0:0.1:2*pi;
+x=sin(3*t).*cos(t);
+y=sin(3*t).*sin(t);
+plot(x,y,'-r','Linewidth',5);
+subplot(1,2,2)
+y1=sin(x);
+y2=sin(x).*exp(-0.1*x);
+plot(x,y1,'+b',x,y2,'-g')
+title('曲线y1 y2')
+xlabel('变量x')
+ylabel('变量y')
+legend('y1','y2');
\ No newline at end of file
diff --git a/lab2/exercise2_6.m b/lab2/exercise2_6.m
new file mode 100644
index 0000000..b86fffe
--- /dev/null
+++ b/lab2/exercise2_6.m
@@ -0,0 +1,16 @@
+x=1:10;
+y=[4.9,3.3,4.2,4.2,5.7,6.5,7.7,9.4,14.7,19.0];
+a=polyfit(x,y,2);
+b=polyfit(x,y,3);
+c=polyfit(x,y,4);
+xx=1:0.1:10;
+yy1=polyval(a,xx);
+yy2=polyval(b,xx);
+yy3=polyval(c,xx);
+plot(x,y,'*b')
+hold on
+plot(xx,yy1,'-r',xx,yy2,'-g',xx,yy3,'-y')
+title('2,3,4次曲线拟合')
+xlabel('变量x')
+ylabel('变量y')
+legend('y','yy1','yy2','yy3')
\ No newline at end of file
diff --git a/lab2/exercise2_7.m b/lab2/exercise2_7.m
new file mode 100644
index 0000000..9d2441a
--- /dev/null
+++ b/lab2/exercise2_7.m
@@ -0,0 +1,16 @@
+subplot(1,2,1);
+x=-3:0.1:3;
+y=-3:0.1:3;
+z=x.*exp(-x.^2-y.^2);
+plot3(x,y,z);
+subplot(1,2,2);
+[x,y]=meshgrid(-3:0.1:3);
+z=x.*exp(-x.^2-y.^2);
+surf(x,y,z);
+shading interp;
+colormap("spring");
+k=find(x<=0 & y<=0);
+z1=z;
+z1(k)=NaN;
+surf(x,y,z1);
+shading interp;
\ No newline at end of file
diff --git a/lab2/exercise2_9.m b/lab2/exercise2_9.m
new file mode 100644
index 0000000..ec1c40e
--- /dev/null
+++ b/lab2/exercise2_9.m
@@ -0,0 +1,3 @@
+axes(handles.axes1);
+[X,Y,Z]=sphere(25);
+mesh(X,Y,2*(Z+1));
diff --git a/lab2/fn.m b/lab2/fn.m
new file mode 100644
index 0000000..818cff5
--- /dev/null
+++ b/lab2/fn.m
@@ -0,0 +1,20 @@
+function t=fn(n);
+m=3;
+t=1:n;
+a=1;
+j=1;
+ind=0;
+while a<n
+    while j<m
+        ind =ind + 1;
+        if ind > length(t)
+            ind=1;
+        end
+        j=j+1;
+    end
+    t(ind)=[]
+    ind=ind-1;
+    j=1;
+    a=a+1;
+end
+t
diff --git a/lab2/pmzbfs.m b/lab2/pmzbfs.m
new file mode 100644
index 0000000..0bef890
--- /dev/null
+++ b/lab2/pmzbfs.m
@@ -0,0 +1,10 @@
+function [raf,jl]=pmzbfs(x1,y1,x2,y2)
+detx=x2-x1;dety=y2-y1;
+faw1=atan(dety/detx);
+j1=sqrt(detx*detx+dety*dety);
+if detx<0
+    raf=faw1+pi;
+end
+if (detx>0)*(det<0)
+    raf=faw1+2*pi;
+end
\ No newline at end of file
diff --git a/lab2/rad2deg.m b/lab2/rad2deg.m
new file mode 100644
index 0000000..b7a318f
--- /dev/null
+++ b/lab2/rad2deg.m
@@ -0,0 +1,7 @@
+function jdeg=rad2deg(rad)
+rad=rad*180/pi;
+deg=fix(rad);
+xsbf=(rad-deg)*60;
+degf=fix(xsbf);
+degm=(xsbf-degf)*60;
+jdeg=deg+degf/100.0+degm/10000.0;
\ No newline at end of file
diff --git a/lab3/exercise3_1.m b/lab3/exercise3_1.m
new file mode 100644
index 0000000..6d4344a
--- /dev/null
+++ b/lab3/exercise3_1.m
@@ -0,0 +1,8 @@
+% 第一题
+
+A=[3,4,-7,-12;5,-7,4,2;1,0,8,-5;-6,5,-2,10];
+B=[4;-3;9;-8];
+% 系数矩阵的秩
+rank(A)
+% 方程的解
+C = A\B
\ No newline at end of file
diff --git a/lab3/exercise3_2.m b/lab3/exercise3_2.m
new file mode 100644
index 0000000..6f4b642
--- /dev/null
+++ b/lab3/exercise3_2.m
@@ -0,0 +1,6 @@
+% 练习3 第二题
+x=-10:1:10;
+y=-10:1:10;
+[X,Y]=meshgrid(x,y);
+Z=sin(sqrt(X.^2+Y.^2))./(sqrt(X.^2+Y.^2));
+surf(X,Y,Z)
\ No newline at end of file
diff --git a/lab3/exercise3_3.m b/lab3/exercise3_3.m
new file mode 100644
index 0000000..c150458
--- /dev/null
+++ b/lab3/exercise3_3.m
@@ -0,0 +1,7 @@
+num=[1];
+den=[1 2 2 1];
+sys=tf(num,den);
+figure(1); pzmap(sys); title('零极点图');
+figure(2); impulse(sys);
+w=0:0.1:10*pi;
+figure(3); freqs(num,den,w)
\ No newline at end of file
diff --git a/lab3/exercise3_4.m b/lab3/exercise3_4.m
new file mode 100644
index 0000000..8768c19
--- /dev/null
+++ b/lab3/exercise3_4.m
@@ -0,0 +1,10 @@
+subplot(2,2,2);
+x=-pi/2:pi/10:pi/2;
+y=sqrt(cos(x));
+plot(x,y);
+subplot(2,2,3);
+x=-2:0.1:2;
+y=-4:0.1:4;
+[x,y]=meshgrid(x,y);
+z=x.^2/4+y.^2/16;
+surf(x,y,z)
\ No newline at end of file
diff --git a/lab3/lab3.m b/lab3/lab3.m
new file mode 100644
index 0000000..1b5841b
--- /dev/null
+++ b/lab3/lab3.m
@@ -0,0 +1,42 @@
+% 实验3
+% 读取数据
+[filename1,p1]=uigetfile('*.txt', '选择尼康全站仪坐标文件名');
+fp=fopen(strcat(p1,filename1),'r');
+i=1;bss=[];
+while ~feof(fp)
+    line=fgetl(fp);
+    data=findstr(line,',');
+    bss(i).dh=line(1:data(1)-1); 
+    bss(i).x=str2num(line(data(1)+1:data(2)-1));
+    bss(i).y=str2num(line(data(2)+1:data(3)-1));
+    bss(i).h=str2num(line(data(3)+1:data(4)-1));
+    bss(i).dm=line(data(4)+1:end);
+    i=i+1;
+end
+fclose(fp);
+
+% 计算国家坐标系的坐标
+a=3976223.453;b=39512553.524;rad=deg2rad(0.433267);
+c=cos(rad);d=-sin(rad);lmd=1.000034336;
+m=i-1;gjzb=[]; 
+for i=1:m
+    gjzb(i).dh=bss(i).dh;
+    gjzb(i).dm=bss(i).dm;
+    gjzb(i).h=bss(i).h;
+    gjzb(i).x=a+lmd*(c*bss(i).x-d*bss(i).y);
+    gjzb(i).y=b+lmd*(d*bss(i).x+c*bss(i).y);
+end
+
+% 输出数据
+[filename2,p2]=uigetfile('*.txt', '输出文件');
+fn=fopen(strcat(p2,filename2),'w');
+fprintf(fn,'%s\n\n','   点名       X(m)        Y(m)     H(mm)   code');
+fclose(fp);fn=fopen(strcat(p2,filename2),'a');
+for i=1:m
+    fprintf(fn,'%8s', gjzb(i).dh);
+    fprintf(fn,'%15.3f', gjzb(i).x);
+    fprintf(fn,'%16.3f', gjzb(i).y);
+    fprintf(fn,'%10.3f', gjzb(i).h);
+    fprintf(fn,'%8s\n', strcat('   ',gjzb(i).dm));
+end
+fclose(fn);
\ No newline at end of file
diff --git a/lab3/nikon.txt b/lab3/nikon.txt
new file mode 100644
index 0000000..fa7a74a
--- /dev/null
+++ b/lab3/nikon.txt
@@ -0,0 +1,7 @@
+3,49510.3110,80362.3190,405.8240,s50
+63,49488.9080,80426.0080,408.8490,S77
+164,49461.2960,80462.3610,408.9950,S77
+165,49457.2500,80485.8770,409.4490,S81
+166,49476.6650,80395.8870,408.1090,S66
+167,49475.1380,80398.7300,408.1570,S77
+298,49465.2360,80593.9700,415.1290,S99
\ No newline at end of file
diff --git a/lab3/zhuanhuan.txt b/lab3/zhuanhuan.txt
new file mode 100644
index 0000000..f9ff4c0
--- /dev/null
+++ b/lab3/zhuanhuan.txt
@@ -0,0 +1,9 @@
+   点名       X(m)        Y(m)     H(mm)   code
+
+       3    4026749.416    39592285.024   405.824     s50
+      63    4026728.820    39592348.981   408.849     S77
+     164    4026701.670    39592385.683   408.995     S77
+     165    4026697.922    39592409.249   409.449     S81
+     166    4026716.196    39592319.017   408.109     S66
+     167    4026714.706    39592321.879   408.157     S77
+     298    4026707.277    39592517.236   415.129     S99
diff --git a/mat2dms.m b/mat2dms.m
new file mode 100644
index 0000000..8172cb2
--- /dev/null
+++ b/mat2dms.m
@@ -0,0 +1,5 @@
+function dmsv=mat2dms(D)
+[l,c]=size(D);
+for i=1:l
+    dmsv(i)=D(i,1)+D(1,2)/60+D(i,3)/3600;
+end
\ No newline at end of file
diff --git a/num2p.m b/num2p.m
new file mode 100644
index 0000000..800ed33
--- /dev/null
+++ b/num2p.m
@@ -0,0 +1,8 @@
+function a=num2p(n)
+strr=num2str(n);
+index=size(strr);
+indexx=index(2);
+a=[];
+for k=indexx-1:-1:0
+    a=[a rem(fix(n/(10^k)),10)];
+end
diff --git a/qwe.mat b/qwe.mat
new file mode 100644
index 0000000..ecb75a8
Binary files /dev/null and b/qwe.mat differ
diff --git a/rad2dms.m b/rad2dms.m
new file mode 100644
index 0000000..6deb25b
--- /dev/null
+++ b/rad2dms.m
@@ -0,0 +1,2 @@
+function radv=rad2dms(dv)
+radv=rem(dv*pi/180,2*pi);
\ No newline at end of file
diff --git a/tiaojianpingcha.m b/tiaojianpingcha.m
new file mode 100644
index 0000000..d27fec5
--- /dev/null
+++ b/tiaojianpingcha.m
@@ -0,0 +1,31 @@
+clc
+disp('条件平差示例2')
+disp('三角形内角观测值')
+L1=[42,12,20]
+L2=[78,9,9]
+L3=[59,38,40]
+L=[L1;L2;L3]
+disp('将角度转换为弧度')
+% LL=dms2rad(mat2dms(L));
+% A=[1,1,1];
+% w=sum(LL(:))-pi;
+% w=dms2mat(rad2dms(w));
+% P=eye(3);
+% Naa=A*inv(P)*A';
+% Ka=-inv(Naa)*w;
+% V=A'*Ka;
+% L1=L+V;
+% LL=dms2rad(mat2dms(L1));
+% sumLL=sum(LL);
+% if (abs(sum(LL)-pi)<1e-4)
+%     disp('正确')
+% else
+%     disp('错误')
+% end
+
+SumLL=tjpc(L);
+if (abs(SumLL-pi)<1e-4)
+    disp('正确')
+else
+    disp('错误')
+end
\ No newline at end of file
diff --git a/tjpc.m b/tjpc.m
new file mode 100644
index 0000000..7ff618c
--- /dev/null
+++ b/tjpc.m
@@ -0,0 +1,12 @@
+function sumLL=tjpc(L)
+LL=dms2rad(mat2dms(L))
+A=[1,1,1];
+w=sum(LL(:))-pi;
+w=dms2mat(rad2dms(w));
+P=eye(3);
+Naa=A*inv(P)*A';
+Ka=-inv(Naa)*w;
+V=A'*Ka;
+L1=L+V;
+LL=dms2rad(mat2dms(L1));
+sumLL=sum(LL);
\ No newline at end of file
diff --git a/ttry.m b/ttry.m
new file mode 100644
index 0000000..6f2b3d6
--- /dev/null
+++ b/ttry.m
@@ -0,0 +1,7 @@
+function ppi=ttry(n)
+pointx=-1+2*rand(1,n);
+pointy=-1+2*rand(1,n);
+index=pointx.*pointx+pointy.*pointy
+indexx=index<=1;
+ppi=4*sum(indexx)/n
+end
diff --git a/untitled3.m b/untitled3.m
new file mode 100644
index 0000000..6d62bec
--- /dev/null
+++ b/untitled3.m
@@ -0,0 +1,10 @@
+A=[1,1,1];
+L=[1,2,2];
+H=[1.003,0.501,-0.503];
+w=7;
+P=diag(2./L);
+P1=inv(P);
+N=A*P1*A';
+Ka=7/N*8;
+V=P1*A'*Ka;
+h=V'+H
\ No newline at end of file
diff --git a/untitled5.m b/untitled5.m
new file mode 100644
index 0000000..7658ec3
--- /dev/null
+++ b/untitled5.m
@@ -0,0 +1,30 @@
+clc
+clear
+h1=-1.004;
+h2=1.516;
+h3=2.512;
+h4=1.520;
+HA=12.013;
+HB=10.013;
+h=[h1,h2,h3,h4]'
+s1=2;
+s2=1;
+s3=2;
+s4=1.5;
+s=[s1,s2,s3,s4]'
+A=[1,1,-1,0;0,1,1,-1];
+w1=h1+h2-h3+Ha-HB;
+w2=h2-h4;
+w=[w1;w2];
+P=diag(1./S)
+Naa=A*inv(P)*A';
+Ka=-inv(P)*A'*Ka;
+H=h+V;
+if H(1,1)+H(2,1)-H(3,1)+HA-HB == 0 && H(2,1)-H(4,1)==0
+    disp('正确')
+else
+    disp('错误')
+end
+disp('平差结果');
+HC=HA+H(1,1)
+HD=HA+H(1,1)+H(4,1)
\ No newline at end of file
diff --git a/veryfun.m b/veryfun.m
new file mode 100644
index 0000000..9b2055e
--- /dev/null
+++ b/veryfun.m
@@ -0,0 +1,16 @@
+function f=veryfun(n)
+if n==6174
+    return
+else
+    index(1)=(n-rem(n,1000))/1000;
+    index(2)=fix(n/100)-index(1)*10;
+    index(3)=rem(fix(n/10),10);
+    index(4)=rem(n,10);
+    index2=sort(index,'ascend');
+    index3=sort(index,'descend');
+    a=[1000 100 10 1];
+    max1=index3*(a');
+    min1=index2*(a');
+    max1-min1
+    veryfun(max1-min1)
+end
\ No newline at end of file