x=[-10:1:10];

y=1/x;

plot(x,y)

-->x
 x  =


         column  1 to 12

  - 10.  - 9.  - 8.  - 7.  - 6.  - 5.  - 4.  - 3.  - 2.  - 1.    0.    1.

         column 13 to 21

    2.    3.    4.    5.    6.    7.    8.    9.    10.

-->y
 y  =

  - 0.0129870
  - 0.0116883
  - 0.0103896
  - 0.0090909
  - 0.0077922
  - 0.0064935
  - 0.0051948
  - 0.0038961
  - 0.0025974
  - 0.0012987
    0.
    0.0012987
    0.0025974
    0.0038961
    0.0051948
    0.0064935
    0.0077922
    0.0090909
    0.0103896
    0.0116883
    0.0129870

y=1/x';

plot(x',y);

plot(x,y');