x=round(rand(1,50)*20+2)

x =

  Columns 1 through 13 

     6    16     8    13     5    16    10    19    19    14    12    20    18

  Columns 14 through 26 

    15    18    15     9     8     9    13    17     8    19    13     9    16

  Columns 27 through 39 

    13    11    16    14    18    21    12    20     5    22     7     7    20

  Columns 40 through 50 

    17     5     2    20     6     8    15     8    11     3    22

hranice=2:22

hranice =

  Columns 1 through 13 

     2     3     4     5     6     7     8     9    10    11    12    13    14

  Columns 14 through 21 

    15    16    17    18    19    20    21    22

xx=sort(x)

xx =

  Columns 1 through 13 

     2     3     5     5     5     6     6     7     7     8     8     8     8

  Columns 14 through 26 

     8     9     9     9    10    11    11    12    12    13    13    13    13

  Columns 27 through 39 

    14    14    15    15    15    16    16    16    16    17    17    18    18

  Columns 40 through 50 

    18    19    19    19    20    20    20    20    21    22    22

pocet=histc(xx,hranice)

pocet =

  Columns 1 through 13 

     1     1     0     3     2     2     5     3     1     2     2     4     2

  Columns 14 through 21 

     3     4     2     3     3     4     1     2
c

stredy =

  Columns 1 through 8 

    2.5000    3.5000    4.5000    5.5000    6.5000    7.5000    8.5000    9.5000

  Columns 9 through 16 

   10.5000   11.5000   12.5000   13.5000   14.5000   15.5000   16.5000   17.5000

  Columns 17 through 20 

   18.5000   19.5000   20.5000   21.5000



pocet=[pocet(1:(end-2)) pocet(end-1)+pocet(end)]

pocet =

  Columns 1 through 13 

     1     1     0     3     2     2     5     3     1     2     2     4     2

  Columns 14 through 20 

     3     4     2     3     3     4     3

bar(stredy,pocet)
shg