Matlab 撠𤾸�𤏪�朞�單𧋦蝔见��

�訜��穃�穃銁 Matlab ���兛憓��找�𧢲��誘嚗峕�讛撓�乩��蘂���誘嚗峕�劐� Enter 銋见�� Matlab 撠梢�见�见嘑銵䕘�� ��穃�𤏸�蝑匧�摰��嘑銵𣬚�鞉�煺�见�峕�滩�質撓�乩�衤��𧢲��誘嚗𣬚�嗅�峕�� Enter �㙈摰��嘑銵䎚�� �嗵車銝��𧢲��誘��銝��见�蓥�𦦵���滢�𨀣芋撘讐迂�� 鈭鍦�閙芋撘� (interactive mode)�� ��穃�睲�笔虾隞亙����鸌�唾� Matlab �嘑銵𣬚����誘嚗� 撖怠銁 M 瑼娍���改�諹�� Matlab 霈���碶�见��停銝�銵𣬚�𦠜𦻖��𦯀�銵𣬚��嘑銵䎚�� �嗵車��𣂼��身摰𡁏郊撽麄���㙈摰��扯�堒�𡁶���滢�𨀣芋撘讐迂�� �鸌甈⊥芋撘� (batch mode)�� �銁�鸌甈⊥芋撘譍葉嚗愢 瑼娍��停憟賢�譍�朣�����單𧋦 (script)嚗� �� Matlab 撠梢�𡡞岷��贝�𡑒�單𧋦銝��蘂�蘂頝蠘�堒眏�� ��隞交�穃�𤑳迂�嗵車蝔见�讐�箄�單𧋦��𤥁�單𧋦蝔见�譌��

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蝭�靘衤�嚗朞��交彍��朞����

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8800001 �∪�齿�� 8 10 8 10 8 9 8 6 0 0 7 0 2 0 0 0 8800002 �∪�齿�� 8 6 8 5 8 7 5 4 0 10 2 2 2 5 5 0 8800003 �∪�齿�� 7 10 8 10 10 10 10 8 5 10 8 4 6 10 5 4 . . . 8800048 �∪�齿�� 6 6 6 4 6 9 10 3 0 7 2 2 0 5 2 3 8800049 �∪�齿�� 9 6 6 5 10 8 8 9 0 7 5 4 2 10 5 5 8800050 �∪�齿�� 5 10 8 10 2 8 10 7 3 4 2 4 4 10 3 0

�𣶹�銁嚗𣬚�箔���𣂷�𥕦�笔�䭾�穃�𤏸�撠��𡃏膩鞈��䠷���� Matlab�� 銝��讠陛�鱓���䲮瘜訫停�糓撠� score.txt 蝔滚�删楊頛荔�䔶蝙摰���鞟�箔��贝�單𧋦蝔见�譌�� �抅�𧋦甇仿��糓嚗�

1. 撠� score.txt ���� Matlab ��撌乩�𨅯���𤥁楝敺睲�羓���𣂼�𧢲�娍��冗�改�� 銝血���娍���齿㺿�� score.m��
2. ��删�� Matlab 銝滩�質���碶葉����𦯀葡嚗峕�隞亥�雿輻鍂蝺刻摩�膥����撌批��葉����枏�滚�券�典⏛�膄�� 憒���𦦵鍂�鞱�䀝�𧢲𧋦�睲��𡁻�嗘辣鈭页��虾�賢��祥��䜘�� 雿��糓��㕑迂憭𡁜�嗡�𣇉�蝺刻摩�膥�虾隞亥�閙�枏𧑐�娍�鞾�坔�衤遙��踺�� ��穃�睲�滚�滩�餈圈�蹱䲮�𢒰��甇仿�麄��
3. 蝺刻摩 quiz.m ��蝚砌�銵��峕�敺䔶�銵䕘�䔶蝙摰���鞟�� Matlab 銝剖恐��𠹺��讠畆�腼�����誘��憒�銝卝��
   

   G = [ 8800001 8 10 8 10 8 9 8 6 0 0 7 0 2 0 0 0 8800002 8 6 8 5 8 7 5 4 0 10 2 2 2 5 5 0 8800003 7 10 8 10 10 10 10 8 5 10 8 4 6 10 5 4 . . . 8800048 6 6 6 4 6 9 10 3 0 7 2 2 0 5 2 3 8800049 9 6 6 5 10 8 8 9 0 7 5 4 2 10 5 5 8800050 5 10 8 10 2 8 10 7 3 4 2 4 4 10 3 0 ];

4. �嘑銵� Matlab嚗𣬚鍂 which score 蝣箏�𡁏��誘��靘�皞鞉糓甇�Ⅱ���� �嗅��嘑銵� score��
5. �蹱��辷�愢atlab 撠梯��乩�銝��� 50 銋� 17 ���畆�腼 G�� �� G ��蝚� 2 銵��蝚� 17 銵諹���坔停�糓 16 甈∪�讛������鞟蜀��靘见�
   

   >> score >> whos Name Size Bytes Class A 50x17 6800 double array Grand total is 850 elements using 6800 bytes

>> B=G(:,2:17)';
>> B=sort(B);
>> g=round(mean(B(5:16, :))*4);

�訜�塚�䔶�𡃏膩撌乩�靝�笔虾隞亦鍂�嗡�硋極�瑁�罸�𥪜�峕�琜�䔶�见�敺株�毺�閰衣�𡑒” Excel�� ��穃�衤犖隤滨�綽�����靝������ 0 ��见�页�袏xcel 瘥磰�摰寞�枏�峕�鞾�嗘遢撌乩�栶�� 憒���𨅯歇蝬栞�賢�删�毺毀雿輻鍂蝺刻摩�膥��� Matlab嚗����𡃏膩瘚�蝔见虾隞交凒敹恍�毺�摰峕�𣂼極雿栶�� ��㕑��閎��霈����虾隞亥䌊撌梯岫閰衣�卝�� (��穃銁撖恍�嗘遢���辣����峕�嚗屸�靘輻�鞟�𦯀��坔飛��笔凝蝛滚�隤脩�撟喳虜��鞟蜀��)

蝭�靘衤�䕘�𡁏鸌甈∪嘑銵屸�滩���甇仿��

隞� r = 2嚗𣬚策摰� x₀ = 0.1嚗� ��穃�𤏸��嘑銵䔶誑銝贝翮隞�

>> r=2;
>> x0=0.1;
>> x(1)=x0;
>> for n=1:100, x(n+1) = r * x(n) * (1-x(n)); end;
>> x(101)
ans =
    0.5000
>> plot(x)
>> axis([1 101 -0.2 1.2])

雿��糓��穃�烐�唾�撠滩迂憭帋�滚�𣬚����彍 r ����嘥�见�� x₀ �𡁜�峕見甇仿�毺�撖阡�𨰜�� ����漤𢒰����挾 Matlab ���誘嚗峕�𤩺活��憭𡁜蘨閬�靽格㺿��滚�抵�䕘�� ��齿鰵閮剖�� r ��㚚�齿鰵閮剖�� x₀嚗� 銋见�𣬚�甇仿�笔�函�嗡�滩�𨳍�� ��䭾迨嚗峕�穃�穃虾隞亙神銝��� M 瑼娍���諹閂憒��㙈 go.m嚗��批捆�糓

x = zeros(1,101); % 撠� x 摨誩�埈飛�妟 x(1)=x0; for n=1:100, x(n+1) = r * x(n) * (1-x(n)); end; x(101) plot(x) axis([1 101 -0.2 1.2])

�鍂 which go 蝣箏�� go �糓甇�Ⅱ�����誘銋见�䕘��虾隞亙嘑銵�

>> r=2; >> x0=0.75; >> go ans = 0.5000

銝虫�𠉛�见��鰵��皜祉鼓��硋耦�� ��穃�穃遣霅啗����銁 2 ��� 4 銋钅�㯄�豢���滚�𣬚� r嚗� �銁 0 ��� 1 銋钅�㯄�豢���滚�𣬚� x₀ �帋�𥕦祕撽𨰜�� �糓�炏��见�隞�暻潭�㕑閎���𣶹鞊∴��

�銁��漤𢒰���單𧋦銝哨�峕�穃�𤑳�见�銝��贝酉閫��� % �糓 Matlab ��銝��衤�萘�坔�堒��嚗�銁 % 隞亙�� (�鉄) ������匧�堒���質◤ Matlab 敹賜裦�� ��隞亙銁 % 銋见�𣬚�����烾�賢虾隞交�鞟�箄酉閫����𨰜��

瘥誩�� M 瑼娍���䂿洵銝�銵屸�见�讠����諹酉閫����梹������䌊��閙�鞟�箇�帋�𦠜�见�� (on-line menual)�� 靘见�嚗�銁 go.m ������漤𢒰撟曇��神銝�

% Input r and 0 < x0 < 1 % This program will iterate r*x*(1-x) 100 times % 瘜冽�� r=3 ��餈𤑳���瘜� % % �鱓蝬剖蔑撖急䲰 2000/01/07 x = zeros(1,101); % 撠� x 摨誩�埈飛�妟 . . .

���銁 Matlab 銝剖虾隞亦鍂 help ��见� go �坔�𧢲��誘��蝪∪鱓隤芣�𠬍�� �坔�贝牧��𤾸���滢蝙�鍂����峕�刻䌊撌梢�賢���厩鍂��

>> help go Input r and 0 < x0 < 1 This program will iterate r*x*(1-x) 100 times 瘜冽�� r=3 ��餈𤑳���瘜� �鱓蝬剖蔑撖急䲰 2000/01/07

���飛�烐�厩椘��讛䌊撌勗祕撽梹�𣬚鍂蝺刻摩�膥撖怠枂隞乩�羓��單𧋦蝔见�譌�� 憒���靝�齿䲮靘選�峕�穃�穃歇蝬枏神憟賭�銝�隞� go.m 蝯血之摰嗅�����

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