2-2 ???矩?????

bW@`UӽdҨҤAڭ̨ϥ MATLAB ܼƨxs¶q]Scalars^A MATLAB ܼ٥iΨxsVq]Vectors^ίx}]Matrix^AHiUعBAҦpG

>> s = [1 3 5 2]; % `N [] ϥΡAΦUƦrťնj >> t = 2*s+1 t = 3 7 11 5

bWҤAMATLAB ϥΤA][]^Aӫإߤ@ӦCVq]Row Vector^ [1 3 5 2 ]ANxsbܼ s AAiBⲣͥt@sCVq [3 7 11 5]AñN䵲Gxsbܼ t C

Hint
  • s = [1 3 5 2] P s = [1, 3, 5, 2] ĪGO@˪C
  • ڭ̤]iHϥ x = 1:n Ӳͥ 1 n CVqC
  • @Ӫ׬ n CVq]iHݦOjp 1nx}C

MATLAB iXVq@ӤΤ@ӰBAҦpG

>> t(3) = 2 % NVq t ĤTӤאּ 2 t = 3 7 2 5 >> t(6) = 10 % bVq t [JĤӤAȬ 10 t = 3 7 2 5 0 10 >> t(4) = [] % NVq t ĥ|ӤRA[] NŶX t = 3 7 2 0 10 >> s(2)*3 + t(4) % X s ĤGӤM t ĥ|ӤӹB ans = 9 >> t(2:4) V 1 % XVq t ĤGܲĥ|ӤӰB ans = 6 1 -1

WzإߦVqkAϥΪ̤]iHإߤjp mnx} ]m Nx}CơAn Nx}ơ^AݦbC@C[W];^AҦpG

>> A = [1 2 3 4; 5 6 7 8; 9 10 11 12]; % إ 34 x} A >> A % ܯx} A e A = 1 2 3 4 5 6 7 8 9 10 11 12

P˦aAڭ̥iHx}iUسBzAҦpG

>> A(2,3) = 5 % Nx} A ĤGCBĤT檺ȡAܬ 5 A = 1 2 3 4 5 6 5 8 9 10 11 12 >> B = A(2,1:3) % Xx} A ĤGCBĤ@ܲĤTAxsx} B B = 5 6 5 >> A = [A B'] % Nx} B mBAHVq֤Jx} A A = 1 2 3 4 5 5 6 5 8 6 9 10 11 12 5 >> A(:, 2) = [] % Rx} A ĤG]GNҦCA[]Nůx}^ A = 1 3 4 5 5 5 8 6 9 11 12 5 >> A = [A; 4 3 2 1] % bx} A A[Jĥ|C A = 1 3 4 5 5 5 8 6 9 11 12 5 4 3 2 1 >> A([1 4], :) = [] % RĤ@B|C]GNҦA[]Oůx}^ A = 5 5 8 6 9 11 12 5

γoXدx}Bz覡AiHͷNQ쪺ĪGANݦU쪺PзNC

b MATLAB xscAC@ӯx}O@ӥH欰D]Column-oriented^Vq]Vector^A]x}UsAڭ̥iΤ@ΤGޡ]Index^ΤUС]Subscript^өw}C|ҨӻAbWzx} A AYݨΦĤGCBĤT檺AiĨGުs覡g A(2, 3)AΥiĨ@ުs覡g A(6)AYx} A Ҧi|βĤӤC

A(:) NONx} A C@|_ӡA@ӦVqAӳo]O MATLAB ܼƪxs覡CHeҦӨAA(:) N|ͤ@ 81 Gx}Τ@KӤVqC


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