Matlab中的向量的运算

1、向量与数的加法

>> a = linspace(1,100,10)

a =

     1    12    23    34    45    56    67    78    89   100

>> a+100

ans =

   101   112   123   134   145   156   167   178   189   200

2、向量与数的减法

>>  a = linspace(1,100,10)

a =

     1    12    23    34    45    56    67    78    89   100

>> a-10

ans =

    -9     2    13    24    35    46    57    68    79    90

3、向量与数的乘法

>> a = linspace(1,100,10)

a =

     1    12    23    34    45    56    67    78    89   100

>> a*10

ans =

  Columns 1 through 8

          10         120         230         340         450         560         670         780

  Columns 9 through 10

         890        1000

4、向量与数的除法

>>  a = linspace(1,100,10)

a =

     1    12    23    34    45    56    67    78    89   100

>> a/10

ans =

    0.1000    1.2000    2.3000    3.4000    4.5000    5.6000    6.7000    7.8000    8.9000   10.0000

5、向量与向量的加法

>>  a = linspace(1,100,10)

a =

     1    12    23    34    45    56    67    78    89   100

>> b = linspace(1,50,10)

b =

    1.0000    6.4444   11.8889   17.3333   22.7778   28.2222   33.6667   39.1111   44.5556   50.0000

>> a+b

ans =

    2.0000   18.4444   34.8889   51.3333   67.7778   84.2222  100.6667  117.1111  133.5556  150.0000

6、向量与向量的减法

>> a = linspace(1,100,10)

a =

     1    12    23    34    45    56    67    78    89   100

>>  b = linspace(1,50,10)

b =

    1.0000    6.4444   11.8889   17.3333   22.7778   28.2222   33.6667   39.1111   44.5556   50.0000

>> a-b

ans =

         0    5.5556   11.1111   16.6667   22.2222   27.7778   33.3333   38.8889   44.4444   50.0000

7、向量与向量的点积

>>  a = linspace(1,100,10)

a =

     1    12    23    34    45    56    67    78    89   100

>>  b = linspace(1,50,10)

b =

    1.0000    6.4444   11.8889   17.3333   22.7778   28.2222   33.6667   39.1111   44.5556   50.0000

>> dot(a,b)

ans =

   1.7818e+04

8、向量与向量的叉积

>> a=[2,4,6]

a =

     2     4     6

>> b=[1,3,5]

b =

     1     3     5

>> cross(a,b)

ans =

     2    -4     2

9、向量与向量的混合积

>> a=[2,4,6]

a =

     2     4     6

>> b=[1,3,5]

b =

     1     3     5

>> c=[4,8,12]

c =

     4     8    12

>> dot(a,cross(b,c))

ans =

     0