Upload original Matlab程序设计 course files

matlab/a2.m

@@ -1,3 +1,9 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:5787da83c9359f43682d1687a1b36abbe8dd5a4fe061c9a8a0ce43cee135e396
-size 89
+clear
+a = 0 ;
+for m=100:999
+    if rem(m,21)==0
+     a = a+1;   
+    end
+end
+a
+

matlab/a3.m

@@ -1,3 +1,4 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:8f7dabd0c37c2410b09f066bb8184344955a7d879b97ed765657623cb4777f3f
-size 65
+clear
+s1='Wmao Ymao Kmao';
+a=find(s1>='A' & s1<'Z')
+s1(a)=[]

matlab/a4.m

@@ -1,3 +1,4 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:78296045433609b27d8af3c3cb58c7ec2d55a7827902d2c6ea3fc55d07362fd3
-size 58
+clear
+A=[1 2 3;4 5 6;7 8 9]
+[u,v] = find(A>=5);
+[u,v]

matlab/a5.m

@@ -1,3 +1,5 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:bb98b4788b216d10c59e117c70811e4cdec6a7f218515823292dd4197eaa06e8
-size 55
+clear
+A=[11 12;13 14]
+AD=det(A)
+AI=inv(A)
+AE=eig(A)

matlab/a6.m

@@ -1,3 +1,3 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:203b159e0744f65812e2319f507eba18ce0929709457239035bff720fae51b7c
-size 42
+clear
+sum(2.^[1:63])
+sum(sum(2).^[1:63])

matlab/b1.m

@@ -1,3 +1,13 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:f989a00932749c5691570743ed1a627357655fec8e50fbf2d3e5e3b16c10dc19
-size 109
+clear
+a1=1;
+a2=1;
+m=0;
+t=2;
+while m<=10000
+    m=a1+a2;
+    a1=a2;
+    a2=m;
+    t=t+1;
+end
+m
+t

matlab/b2.m

@@ -1,3 +1,12 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ee3bb1d2948fa1a3e6466ec0e1e2cd857f5039829a6c5fcb678b028d9d9032cc
-size 288
+syms x1 x2 p a
+x1=input('������x1��ֵ')
+x2=input('������x2��ֵ')
+a=x1+x2
+switch 1
+    case a>1
+        p = 0.5457*exp(-0.75*x2^2-3.75*x1^2-1.5*x1)
+    case -1<a & a<=1
+        p = 0.7575*exp(-x2^2-6*x1^2)
+    case a<=-1
+        p = 0.5457*exp(-0.75*x2^2-3.75*x1^2+1.5*x1)
+end

matlab/b3.m

@@ -1,3 +1,4 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:0c0d07678e220ad4fa27454c962e2e27a06eb07f4597c42d0ff678f1f7880793
-size 70
+t=0:0.01:4*pi
+y1=exp(-t/3);
+y2=sin(3*t).*exp(-t/3);
+plot(t,y1,t,y2)

matlab/b4.m

@@ -1,3 +1,5 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:88bde0837184e62b96ec732368847aa2590c5c7a7733d57ef80bd72269afd9a1
-size 72
+function f=fx(x)
+y=0.1+(x-2).^2;
+t=0.01+(x-3).^4;
+f=1./y+1./t;
+end

matlab/c1.m

@@ -1,3 +1,14 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:01432ce43f16c681f272caa009fc6e583428e5c3d8c4e7178d0db9a1bac2bc15
-size 161
+clear
+syms n y
+y = 0;
+n = 0;
+while y <= 3
+    n = n+1;
+    y = y+1/(2*n-1);
+end
+if y > 3
+    n = n-1;
+end
+disp 'y<3ʱ,����nֵΪ'
+n
+y = y-1/(2*n+1)

matlab/c2.m

@@ -1,3 +1,13 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:d2b200552ac94714f024305fb999330b9c642921f18e8619fe9131367b8d7305
-size 188
+clear
+f(1) = 1;
+f(2) = 0;
+f(3) = 1;
+for n = 4:100
+    f(n) = f(n-1)-2*f(n-2)+f(n-3);
+end
+max(f)
+min(f)
+sum(f)
+i = length(find(f<0))
+j = length(find(f>0))
+k = length(find(f==0))

matlab/c3.2.m

@@ -1,3 +1,14 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:0174ac8d55fbd6fe5134f7c261731f4ce8c5cc5956528be54ffda5faa99eaf83
-size 238
+x = input ('����һ���ٷ��Ƴɼ�')
+if x > 100 || x < 0
+    disp '����ijɼ�����ȷ'
+elseif x>= 90
+    disp "A"
+elseif x>=80
+    disp "B"
+elseif x>= 70
+    disp "C"
+elseif x>=60
+    disp "D"
+else
+    disp "E
+   ����ٷ��Ƴɼ�:76 

matlab/c3.m

@@ -1,3 +1,19 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:72ef69502e672c6f3a853274a57dc5124c6daa9e645c6488f64dcc329505b248
-size 321
+x=input('����һ���ٷ��Ƴɼ�')
+switch floor(x/10)
+    case 9
+        disp A
+    case 8
+        disp B
+    case 7
+        disp C
+    case 6
+        dispD
+    case num2cell(0:5)
+        disp E
+    otherwise 
+        if x==100
+            disp A
+        else disp '����ijɼ�����ȷ'
+        end
+end
+        

matlab/c4.m

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-version https://git-lfs.github.com/spec/v1
-oid sha256:8c74fe57ce1f6a92a9a9911e467679bbff4f66d90acbdeef84f2f55887497731
-size 184
+clear
+x=input('������x��ֵ')
+if x<0 & X~=3
+    y=x.^2+x-6
+elseif x>=0 & x<5 & x~=2 & x~=3
+    y=x.^2-5*x+6
+else
+    y=x.^2-x-1
+end
+a = [-0.5,-3.0,1.0,2.0,2.5,3.0,5.0]
+y = a

matlab/c5.m

@@ -1,3 +1,9 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:cbf259fc026f18d3891de6a4fd1d6d3e0e8d25f71859a941b36fe7c69580ad60
-size 159
+x=rand(1,30000);
+A = mean(x)
+d = std(x)
+Max = max(x)
+Min = min(x)
+y = length(find(x>0.5));
+i = y/30000 * 100%
+z=length(find(x<0.5));
+p = z/30000 * 100%

matlab/c6.m

@@ -1,3 +1,11 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:0c6c7e032af95460f7fe2948d3cc33019ab942ae2ef99d1f3aa6f21a4ed18877
-size 162
+clear
+t = 45+50*rand(100,5);
+P = fix(t);
+[x,i]=max(P)
+[y,j]=min(P)
+A=mean(P)
+d=std(P)
+s=sum(P,2)
+[X,m]=max(s)
+[Y,n]=min(s)
+[score,num]=sort(s,'descend')

matlab/c7.m

@@ -1,3 +1,8 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:0039f3fd0822213a8385f0ea7df8be14e568bdb9d8256766d3da783f88e5f45e
-size 142
+p1=[1,2 4.0.5];
+p2=[1,2];
+p3=[1,2,3];
+p=p1+[0,conv(p2,p3)]
+A = roots(p)
+A=[-1 1.2 -1.4;0.75 2 3.5;0 5 2.5];
+polyval (p,A)
+polyvalm(p,A)

matlab/d1.m

@@ -1,3 +1,4 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:94ea5e30d355dd76633f9d1824fa4682059a244fc52111b0a108588f7074f0b3
-size 100
+t = 0:0.5 ;2*pi;
+plot(t,sin(t),'r-.o',t,cos(t),'m-s')
+legend('sinx','cosx',4)
+axis([0 2*pi -2 2])

matlab/d2.m

@@ -1,3 +1,3 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a3bf3ae0b26232392a4eef15340d2c388bee78e4b849fea472e0840270f72a18
-size 65
+function Y=myfun(x)
+Y(:,1)=200*sin(x(:))./x(:);
+Y(:,2)=x(:).^2;

matlab/d3.m

@@ -1,3 +1,11 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:532c29937a943fd21b060e18e05b18aae4ab0cd4ff3c1e3a90da05a48e21f225
-size 196
+x=0:0.1:100
+y=log10(x)
+subplot(311),loglog(x,y)
+grid
+title('loglog graph')
+subplot(312),semilogx(x,y)
+grid
+title('semilogx graph')
+subplot(313),semilogy(x,y)
+grid
+title('semilogy graph')

matlab/d4.m

@@ -1,3 +1,9 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:1739502332b6675f9438482c4be2c6a7065ab59c1e3ca7a0fe112c959a491b54
-size 154
+t=-3:0.125:3;
+x=sin(2.*t);y=cos(2.*t);[x,y]=meshgrid(x,y);
+z=x.^2+2*y.^2;
+mesh(x,y,z)
+axis([-1 - -1 - 0 3])
+pause
+meshc(x,y,Z)
+pause
+surf(x,y,z)

matlab/d5.m

@@ -1,3 +1,3 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:9c33451e1d7c76a32a71266f0c502fcbec4034b6f1880037adb0ba97dd89dc26
-size 71
+x=[-2:0.02:2];
+y=1.1*sign(x).*(abs(x)>1.1)+x*(abs(x)<=1.1);
+plot(x,y)