东南大学Matlab作业1

1、Matlab Worksheet 1Part AGet into Matlab: Use the diary command to record your activity in to a file: diary mydiary01.doc before you start your work. (And diary off to switch off your diary when you finish your work.)At the Command Window assign a value x=10, then use the Up Key T to repeat the expre

2、ssion, editing it to show the effect of using a semicolon after the 10, namely x=10;Answers: x=1010 x=10;Confirm whether the following names of variables are acceptable:VelocityVelocity 1Velocity. 1Velocity_lVelocity-01 f) velocityONE g) 1 velocityYes NoYes NoYes NoYes NoYes NoYes NoYes NoVelocity 1

3、Velocity_l velocityONEVelocity. 1Velocity-011 velocityAnswers: (l)legal variable names : a) Velocityb) d)f)illegal variable names: c) e) g)Assign two scalar variables x and y values x=1.5, y=23, then construct Matlab expressions for the following:x+ ya) z =b) z = Q74rc) z= -温-i + 1 92ylog/ -1) J0.54

4、690.9157Using array subscripts, create an expression for the sum of the element in the top right-hand-corner of A and the bottom left-hand-corner of A. Also assign the 2nd column of A to a column vector b, and assign the 3rd row of A to a row vector d.Answer: A=rand(5,4)A 二0.75130.25510.50600.69910.

5、89090.75130.25510.50600.69910.89090.95930.54720.13860.14930.25750.84070.25430.81430.24350.92930.35000.19660.25110.61600.4733 x=A(l,4)+A(4,l)x 二1.0491 b=A(:,2)b 二0.95930.54720.13860.14930.2575 d=A(3,:) d =0.50600.13860.81430.2511diary off to switch off your diary now.Using the colon operator, assign

6、a row vector array t, values between 0 and 10 in steps of 0.01. Use the ; operator to prevent displaying the information. Obtain the term-by-term values of functions:z = e-,05z sin(7r，)cos(2万 t)a) z = b) z = eQ5t sin( t) c)Answers:(1 )home_work_ 1 _A_ 15.mt=0:0.01:10;zl=exp(-0 . 05*t)z2=zl.z3 = z2 .

7、z2=zl.z3 = z2 .sin (pi*t)cos (2*pi*t)(2)resulthome work 1 A 15Columns 1 through 101.00000.99950.99650.99600.99550.99900.99850.99800.99750.9970Columns 11 through 200.99500.99450.99150.99100.99050.99500.99450.99150.99100.99050.99400.99350.99300.99250.9920Columns 21 through 300.99000.98960.98660.98610.

8、98560.99000.98960.98660.98610.98560.98910.98860.98810.98760.9871Columns 31 through 400.98510.98460.98170.98120.98070.98510.98460.98170.98120.98070.98410.98360.98310.98270.9822Columns 41 through 500.97870.97820.97780.97730.97380.97340.97290.97240.96900.96850.96800.96750.96420.96370.96320.96270.95930.

9、95890.95840.95790.95460.95410.95360.95310.94980.94930.94890.94840.94510.94460.94410.94360.98020.97970.97920.97680.97630.9758Columns 51 through 600.97530.97480.97430.97190.97140.9709Columns 61 through 700.97040.97000.96950.96710.96660.9661Columns 71 through 800.96560.96510.96460.96220.96180.9613Colum

10、ns 81 through 900.96080.96030.95980.95740.95700.9565Columns 91 through 1000.95600.95550.95500.95270.95220.9517Columns 101 through 1100.95120.95080.95030.94790.94740.9470Columns 111 through 1200.94650.94600.94550.94320.94270.9422Columns 121 through 1300.94180.94130.94080.94040.93990.93940.93890.93850

11、.93800.9375Columns 131 through 1400.93710.93660.93610.93570.93520.93470.93430.93380.93330.9329Columns 141 through 1500.93240.93190.93150.93100.93050.93010.92960.92910.92870.9282Columns 151 through 1600.92770.92730.92680.92640.92590.92540.92500.92450.92400.9236Columns 161 through 1700.92310.92270.922

12、20.92170.92130.92080.92040.91990.91940.9190Columns 171 through 1800.91850.91810.91760.91710.91670.91620.91580.91530.91480.9144Columns 181 through 1900.91390.91350.91300.91260.91210.91160.91120.91070.91030.9098Columns 191 through 2000.90940.90890.90850.90800.90760.90710.90660.90620.90570.9053Columns

13、201 through 2100.90480.90440.90390.90170.90120.9008Columns 211 through 2200.90030.89990.89940.89720.89670.8963Columns 221 through 2300.89580.89540.89490.89270.89230.8918Columns 231 through 2400.89140.89090.89050.88830.88780.8874Columns 241 through 2500.88690.88650.88600.88380.88340.8829Columns 251 t

14、hrough 2600.88250.88210.88160.87940.87900.8785Columns 261 through 2700.87810.87770.87720.87500.87460.87420.90350.90300.90260.89900.89850.89810.89450.89400.89360.89000.88960.88910.88560.88510.88470.88120.88070.88030.87680.87630.87590.90210.89760.89320.88870.88430.87990.8755Columns 271 through 2800.87

15、370.87330.87280.87240.87200.87150.87110.87070.87020.8698Columns 281 through 2900.86940.86890.86850.86810.86760.86720.86680.86630.86590.8655Columns 291 through 3000.86500.86460.86420.86370.86330.86290.86240.86200.86160.8611Columns 301 through 3100.86070.86030.85980.85940.85900.85860.85810.85770.85730

16、.8568Columns 311 through 3200.85640.85600.85560.85510.85470.85430.85380.85340.85300.8526Columns 321 through 3300.85210.85170.85130.85090.85040.85000.84960.84920.84870.8483Columns 331 through 3400.84790.84750.84700.84660.84620.84580.84540.84490.84450.8441Columns 341 through 3500.84370.84320.84280.842

17、40.84200.84160.84110.84070.84030.8399Columns 351 through 3600.80780.80730.80690.83950.83900.83860.83820.83780.83740.83690.83650.83610.8357Columns 361 through 3700.83530.83490.83440.83400.83360.83320.83280.83240.83190.8315Columns 371 through 3800.83110.83070.83030.82990.82940.82900.82860.82820.82780.

18、8274Columns 381 through 3900.82700.82650.82610.82570.82530.82490.82450.82410.82370.8232Columns 391 through 4000.82280.82240.82200.82160.82120.82080.82040.82000.81950.8191Columns 401 through 4100.81870.81830.81790.81750.81710.81670.81630.81590.81550.8151Columns 411 through 4200.81460.81420.81380.8134

19、0.81300.81260.81220.81180.81140.8110Columns 421 through 4300.81060.81020.80980.80940.80900.80860.8082Columns 431 through 4400.77610.80650.80610.80570.80530.80490.80450.80410.80370.80330.8029Columns 441 through 4500.80250.80210.80170.80130.80090.80050.80010.79970.79930.7989Columns 451 through 4600.79

20、850.79810.79770.79730.79690.79650.79610.79570.79530.7949Columns 461 through 4700.79450.79410.79370.79330.79290.79250.79220.79180.79140.7910Columns 471 through 4800.79060.79020.78980.78940.78900.78860.78820.78780.78740.7870Columns 481 through 4900.78660.78620.78580.78540.78510.78470.78430.78390.78350

21、.7831Columns 491 through 5000.78270.78230.78190.78150.78110.78080.78040.78000.77960.7792Columns 501 through 5100.77880.77840.77800.77760.77720.77690.77650.77570.7753Columns 511 through 5200.77490.77450.77410.77220.77180.7714Columns 521 through 5300.77110.77070.77030.76840.76800.7676Columns 531 throu

22、gh 5400.76720.76680.76640.76450.76410.7638Columns 541 through 5500.76340.76300.76260.76070.76030.7600Columns 551 through 5600.75960.75920.75880.75690.75650.7562Columns 561 through 5700.75580.75540.75500.75310.75280.7524Columns 571 through 5800.75200.75160.7513Columns 581 through 590Columns 581 throu

23、gh 5900.77380.77340.77300.77260.76990.76950.76910.76870.76610.76570.76530.76490.76220.76190.76150.76110.75840.75810.75770.75730.75470.75430.75390.75350.75090.75050.75010.74980.74940.74900.74860.74830.74790.74750.74560.74530.7449Columns 591 through 6000.74450.74420.74380.74190.74160.7412Columns 601 t

24、hrough 6100.74080.74040.74010.73820.73790.7375Columns 611 through 6200.73710.73680.73640.73450.73420.7338Columns 621 through 6300.73340.73310.73270.73090.73050.7302Columns 631 through 6400.72980.72940.72910.72720.72690.7265Columns 641 through 6500.72610.72580.72540.72360.72330.7229Columns 651 throug

25、h 6600.72250.72220.72180.72000.71960.71930.74710.74680.74640.74600.74340.74300.74270.74230.73970.73930.73900.73860.73600.73570.73530.73490.73230.73200.73160.73120.72870.72830.72800.72760.72510.72470.72430.72400.72140.72110.72070.7204Columns 661 through 670d) z = sin(2玄 一 y) + ex cos(2玄)Answers:the r

26、esult of the Command Window is: x=1.5;y=2.3 ;z 1 =5*xA3 *y/(x+y)z2=(xA7*yA0.5)A(2/3)z3=(xA(l/6)/(log 10(xA5-l)+1 )*exp(-2*y)z4=sin(2*pi*x-y)+exp(x).*cos(2*pi*x)zl 二10.2138z2 二8.7566z3 二0.0232z4 二-3.7360Assign two variables with complex values u=2+3j and v=4+10j and then construct expression for:a) b

27、) uv+2j c) d) vej27luv2jAnswers:the result of the Command Window is: u=2+3j; v=4+1 Oj;zl=u/vz2=u*v+2jz3=u/2jz4 = v*exp(-j *2*pi*u) zl 二0.71890.71860.71820.71640.71610.7157Columns 671 through 6800.71530.71500.71460.71280.71250.7121Columns 681 through 6900.71180.71140.71110.70930.70890.7086Columns 691

28、 through 7000.70820.70790.70750.70570.70540.7050Columns 701 through 7100.70470.70430.70400.70220.70190.7015Columns 711 through 7200.70120.70080.70050.69870.69840.6980Columns 721 through 7300.69770.69730.69700.69520.69490.6945Columns 731 through 7400.71780.71750.71710.71680.71430.71390.71360.71320.71

29、070.71030.71000.70960.70720.70680.70650.70610.70360.70330.70290.70260.70010.69980.69940.69910.69660.69630.69590.69560.69320.69280.69250.69210.69420.69380.69350.69180.69140.6911Columns 741 through 7500.66460.66430.66400.69070.69040.69000.68970.68940.68900.68870.68830.68800.6876Columns 751 through 760

30、0.68730.68690.68660.68630.68590.68560.68520.68490.68450.6842Columns 761 through 7700.68390.68350.68320.68280.68250.68220.68180.68150.68110.6808Columns 771 through 7800.68050.68010.67980.67940.67910.67880.67840.67810.67770.6774Columns 781 through 7900.67710.67670.67640.67600.67570.67540.67500.67470.6

31、7440.6740Columns 791 through 8000.67370.67330.67300.67270.67230.67200.67170.67130.67100.6707Columns 801 through 8100.67030.67000.66970.66930.66900.66860.66830.66800.66760.6673Columns 811 through 8200.66700.66660.66630.66600.66560.66530.6650Columns 821 through 8300.66370.66330.66300.66130.66100.6607C

32、olumns 831 through 8400.66030.66000.65970.65800.65770.6574Columns 841 through 8500.65700.65670.65640.65480.65440.6541Columns 851 through 8600.65380.65340.65310.65150.65120.6508Columns 861 through 8700.65050.65020.64990.64820.64790.6476Columns 871 through 8800.64730.64690.64660.64500.64470.6444Column

33、s 881 through 8900.64400.64370.64340.64180.64150.64110.66270.66230.66200.65940.65900.65870.65610.65570.65540.65280.65250.65210.64950.64920.64890.64630.64600.64560.64310.64270.64240.66170.65840.65510.65180.64860.64530.6421Columns 891 through 9000.64080.64050.63860.63830.63790.64020.63990.63950.63920.

34、6389Columns 901 through 9100.63760.63730.63540.63510.6348Columns 911 through 9200.63700.63670.63640.63600.63570.63440.63410.63220.63190.6316Columns 921 through 9300.63380.63350.63320.63290.63250.63130.63100.62910.62880.6284Columns 931 through 9400.63070.63030.63000.62970.62940.62810.62780.62590.6256

35、0.6253Columns 941 through 9500.62750.62720.62690.62660.62630.62500.62470.62280.62250.6222Columns 951 through 9600.62440.62410.62380.62340.62310.62190.62160.61970.61940.6191Columns 961 through 9700.62130.62100.62060.62030.62000.61880.61850.61660.61630.61600.61820.61790.61750.61720.6169Columns 971 thr

36、ough 9800.61570.61540.61350.61320.61290.61510.61480.61450.61420.6139Columns 981 through 9900.61260.61230.61050.61020.60990.61200.61170.61140.61110.6108Columns 991 through 10000.60960.60930.60740.60710.60680.60900.60870.60840.60800.6077Column 10010.6065z2 二Columns 1 through 1000.03140.21740.24770.277

37、70.06270.09400.12510.15600.1868Columns 11 through 200.30750.33690.50470.53100.55680.36590.39460.42280.45060.4779Columns 21 through 300.58190.60650.74010.75980.77880.63050.65380.67640.69830.7196Columns 31 through 400.84670.86150.87550.88870.95520.96090.96570.96960.96950.96570.96090.95520.88930.87630.

38、86250.84790.72320.70250.68110.65900.48830.46190.43510.40790.20820.17880.14920.1195-0.0894-0.1190-0.1484-0.17770.79700.81440.83090.90090.91230.9227Columns 41 through 500.93220.94080.94850.97240.97440.9753Columns 51 through 600.97530.97430.97240.94850.94090.9324Columns 61 through 700.92290.91260.90140

39、.83240.81610.7990Columns 71 through 800.78120.76260.74330.63630.61300.5892Columns 81 through 900.56470.53980.51430.38020.35230.3240Columns 91 through 1000.29540.26660.23750.08970.05980.0299Columns 101 through 1100.0000-0.0299-0.0597-0.2068-0.2356-0.2642Columns 111 through 120-0.2925-0.3205-0.3481-0.

40、3753-0.4022-0.4286-0.4546-0.4801-0.5051-0.5296Columns 121 through 130-0.5536-0.5769-0.5997-0.5536-0.5769-0.5997-0.6219-0.6434-0.6643-0.6845-0.7040-0.7227-0.7408Columns 131 through 140-0.7581-0.7746-0.7904-0.7581-0.7746-0.7904-0.8054-0.8195-0.8328-0.8453-0.8570-0.8678-0.8777Columns 141 through 150-0.

41、8868-0.8949-0.9022-0.8868-0.8949-0.9022-0.9086-0.9140-0.9186-0.9223-0.9250-0.9268-0.9277Columns 151 through 160-0.9277-0.9268-0.9250-0.9277-0.9268-0.9250-0.9222-0.9186-0.9140-0.9086-0.9022-0.8950-0.8869Columns 161 through 170-0.8779-0.8681-0.8574-0.8779-0.8681-0.8574-0.8459-0.8336-0.8204-0.8065-0.79

42、18-0.7763-0.7601Columns 171 through 180-0.7431-0.7254-0.7070-0.7431-0.7254-0.7070-0.6880-0.6682-0.6479-0.6269-0.6053-0.5831-0.5604Columns 181 through 190-0.5372-0.5134-0.4892-0.4645-0.4394-0.4139-0.3880-0.3617-0.3351-0.3082Columns 191 through 200-0.1419-0.1136-0.0853-0.2810-0.2536-0.2259-0.1981-0.17

43、01-0.0569-0.0284Columns 201 through 2100.08500.11320.14120.16900.35700.38260.40770.43240.59150.61200.63190.65110.76610.77950.79220.80410.86430.86950.87380.87730.87730.87380.86950.86430.80470.79290.78040.7672-0.00000.02840.05680.19670.22410.2513Columns 211 through 2200.27820.30480.33110.45670.48050.5

44、038Columns 221 through 2300.52660.54880.57050.66960.68750.7047Columns 231 through 2400.72110.73690.75190.81520.82550.8349Columns 241 through 2500.84350.85130.85820.87990.88160.8825Columns 251 through 2600.88250.88160.87990.85820.85140.8437Columns 261 through 2700.83510.82580.81560.75320.73840.7230Co

45、lumns 271 through 2800.70690.70690.69000.67250.65440.63560.61630.59630.57580.55470.5331Columns 281 through 2900.51100.51100.48840.46540.44190.41800.39370.36900.34410.34410.31880.2932Columns 291 through 3000.26730.26730.24120.21490.18840.16180.13500.10810.08110.08110.05410.0270Columns 301 through 310

46、0.00000.0000-0.0270-0.0540-0.0809-0.1077-0.1343-0.1608-0.1871-0.2132-0.2391Columns 311 through 320-0.2646-0.2900-0.3150-0.2646-0.2900-0.3150-0.3396-0.3639-0.3878-0.4113-0.4344-0.4571-0.4792Columns 321 through 330-0.5009-0.5220-0.5426-0.5009-0.5220-0.5426-0.5627-0.5822-0.6011-0.6193-0.6370-0.6540-0.6

47、703Columns 331 through 340-0.6860-0.7009-0.7152-0.6860-0.7009-0.7152-0.7287-0.7415-0.7536-0.7649-0.7754-0.7852-0.7942Columns 341 through 3500.8024-0.8098-0.8163-0.8221-0.8271-0.8312-0.8345-0.8370-0.8386-0.8395Columns 351 through 3600.8395-0.8386-0.8370-0.8345-0.8312-0.8271-0.8221-0.8164-0.8098-0.802

48、5Columns 361 through 3700.7944-0.7855-0.7758-0.7654-0.7543-0.7424-0.7298-0.7164-0.7024-0.6877Columns 371 through 3800.6724-0.6564-0.6397-0.6225-0.6046-0.5862-0.5672-0.5477-0.5277-0.5071Columns 381 through 3900.4861-0.4646-0.4427-0.4203-0.3976-0.3745-0.3510-0.3273-0.3032-0.2789Columns 391 through 400

49、0.2543-0.2294-0.2044-0.1792-0.1539-0.1284-0.1028-0.0772-0.0515-0.0257Columns 401 through 4100.00000.02570.05140.07690.10240.12780.15300.17800.20280.2274Columns 411 through 4200.25170.27580.29960.32310.34620.36890.39130.41320.43480.4558Columns 421 through 4300.3276 - 0.0690iz2 =-22.0000 +34.0000iz3 =

50、1.5000- l.OOOOiz4 =6.1421e+08 + 1.5355e+09iUse the colon operator : to assign numerical values between 0 and 1 to vector array variable a in steps of 0.1.Answer:the result of the Command Window is: V=0:0.1:lV =Columns 1 through 1000.10000.20000.30000.40000.50000.60000.70000.80000.9000Column 111.0000

51、Use linspace function to assign 20 values to vector variable y between 20 and 30.Answer:the result of the Command Window is: V=linspace(20,30,20)0.47640.49660.51620.60590.62210.6376Columns 431 through 4400.65250.66670.68030.73760.74690.7555Columns 441 through 4500.76320.77030.77650.79620.79770.7985C

52、olumns 451 through 4600.79850.79770.79610.77660.77030.7634Columns 461 through 4700.75560.74720.73800.68150.66820.6542Columns 471 through 4800.63960.62440.60850.52100.50190.4824Columns 481 through 4900.46240.44190.42110.31130.28840.2653Columns 491 through 5000.24190.21830.19450.5352().55380.57170.589

53、10.69320.70540.71680.72760.78200.78670.79070.79380.79380.79060.78670.78200.72810.71750.70620.69420.59210.57510.55760.53960.39980.37820.35620.33390.17050.14640.12210.09780.07340.04900.0245Columns 501 through 5100.00000.0000-0.0245-0.0489-0.0732-0.0974-0.1215-0.1455-0.1693-0.1929-0.2163Columns 511 thr

54、ough 520-0.2395-0.2624-0.2850-0.2395-0.2624-0.2850-0.3073-0.3293-0.3509-0.3722-0.3931-0.4136-0.4336Columns 521 through 530-0.4532-0.4723-0.4910-0.4532-0.4723-0.4910-0.5091-0.5268-0.5439-0.5604-0.5764-0.5917-0.6065Columns 531 through 540-0.6207-0.6342-0.6471-0.6207-0.6342-0.6471-0.6594-0.6710-0.6819-

55、0.6921-0.7016-0.7105-0.7186Columns 541 through 550-0.7260-0.7327-0.7387-0.7260-0.7327-0.7387-0.7439-0.7484-0.7521-0.7551-0.7573-0.7588-0.7596Columns 551 through 560-0.7596-0.7588-0.7573-0.7596-0.7588-0.7573-0.7551-0.7521-0.7483-0.7439-0.7387-0.7328-0.7261Columns 561 through 570-0.7188-0.7107-0.7020-

56、0.7188-0.7107-0.7020-0.6926-0.6825-0.6717-0.6603-0.6483-0.6356-0.6223Columns 571 through 580-0.6084-0.5939-0.5789-0.6084-0.5939-0.5789-0.5632-0.5471-0.5304-0.5132-0.4956-0.4774-0.4588Columns 581 through 590-0.4398-0.4204-0.4005-0.2744-0.2523Columns 591 through 600-0.2301-0.2076-0.1850-0.0466-0.0233C

57、olumns 601 through 610-0.3803-0.3598-0.3389-0.3176-0.2961-0.00000.02330.04650.16100.18350.2058Columns 611 through 6200.22780.24960.27110.37390.39340.4125Columns 621 through 6300.43110.44930.46700.54820.56290.5769Columns 631 through 6400.59040.60330.61560.66740.67580.6836Columns 641 through 6500.6906

58、0.69700.70260.72040.72180.7225-0.1622-0.1392-0.1162-0.09300.06960.09270.11560.29230.31320.33380.48430.50110.51730.62720.63820.64860.70760.71190.7154-0.06980.13840.35400.53310.65840.7183Columns 651 through 6600.71820.71540.71180.70760.65880.64920.63900.62810.53580.52040.50460.48820.36180.34220.32230.

59、30210.15430.13240.11050.0885-0.0662-0.0881-0.1100-0.13160.72250.72180.72040.70270.69700.6907Columns 661 through 6700.68370.67610.66780.61660.60460.5919Columns 671 through 6800.57870.56490.55060.47140.45420.4365Columns 681 through 6900.41840.39990.38100.28170.26100.2400Columns 691 through 7000.21890.

60、19750.17600.06640.04430.0221Columns 701 through 7100.0000-0.0221-0.0442-0.1532-0.1745-0.1957Columns 711 through 720-0.2167-0.2374-0.2579-0.2781-0.2167-0.2374-0.2579-0.2781-0.2979-0.3175-0.3368-0.3557-0.3742-0.3923Columns 721 through 730-0.5215-0.4101-0.4274-0.4443-0.4607-0.4766-0.4921-0.5071-0.5354-