Matlab 编程与工程应用（第二版）习题解答 第一章：MATLAB 简介 1. >> myage = 25; >> myage = myage - 1; >> myage = myage + 2; 2. >> myage = 25; >> myage = myage - 1; >> myage = myage + 2; 3. >> namelengthmax ans = 63 4. >> format bank >> 1/3 ans = 0.33 5. >> format rat >> 5/6 + 2/7 ans = 47/42 6. 25 19 4.3333 9 9 7. >> pounds = 100; >> kilos = 2.2 * pounds kilos = 220.0000 8. >> R1 = 20; R2 = 30; R3 = 40; >> RT = (R1\1 + R2\1 + R3\1)\1 RT = 9.2308 9. >> ftemp = 90; >> ctemp = (ftemp - 32) * 5 / 9 ctemp = 32.2222 10. 略 11． >> sind(90) ans = 1 12. >> sita = 2 * pi / 3; >> r = 2; >> x = r * cos(sita) x = -1.0000 >> y = r * sin(sita) y = 1.7321 13． >> t = 100;V = 50; >> wcf = 35.7 + 0.6 * t - 35.7 + 0.16 * V + 0.43 * t * 0.16 * V wcf = 412 14. Fix(3.5) = 3; Floor(3.5) = 3; Fix(3.4) = 3; Fix(-3.4) = -3; Fix(3.2) = 3; Floor(3.2) = 3; Fix(-3.2) = -3; Floor(-3.2) = -4; Fix(-3.2) = -3; Ceil(-3.2) = -3; 15. Sqrt(19) 3 ^ 1.2 Tan(pi) 16. Intmin(‘int32’); intmax(‘int32’); intmin(‘int64’);intmax(‘int64’); 17. Realmin(‘double’); Realmax(‘double’); 18. >> DblNum = 33.8; >> int32Num = int32(DblNum) int32Num = 34 19. >> A1 = rand; A2 = 20*rand; A3 = 30 * rand + 20; A4 = round(rand * 10); A5 = round(rand * 11); / A6 = round(rand * 50) + 50; >> A4 = randi(10); >> A5 = randi(11); >> A6 = randi(50) + 50; 20. 略 21. Double（‘A’） < Double(‘a’); 所以大写在前，小写在后； 22. >> CharNum = 'xyz'; >> CharNum = char(CharNum - 2) CharNum = vwx 23. >> vec = [3 : 1 : 6] vec = 3 4 5 6 >> vec2 = [1.0000:0.5000:3.0000] vec2 = 1.0000 1.5000 2.0000 2.5000 3.0000 >> vec3 = [5 : -1 :2] vec3 = 5 4 3 2 24. >> vec1 = linspace(4,8,3) ...
