Matlab中标记字符串的直方图

看看uniq_c.m

1;
function [val, cnt] = uniq_c (X)
  [val, ~, J] = unique (X);
  cnt = accumarray (J(:), 1);
  if (rows (J) == 1)
    cnt = cnt';
  endif
endfunction

airlines = {'Turkish Airlines','Turkish Airlines','Anadolu Jet','Turkish Airlines','Onur Air','Anadolu Jet','Turkish Airlines','Turkish Airlines', 'Anadolu Jet','Turkish Airlines','Turkish Airlines','Turkish Airlines','Turkish Airlines','Turkish Airlines','Turkish Airlines','Turkish Airlines','Pegasus Airlines','Turkish Airlines','Atlas Global','Anadolu Jet','Turkish Airlines','Pegasus Airlines','Turkish Airlines', 'Anadolu Jet','Pegasus Airlines', 'Turkish Airlines', 'Onur Air', 'Anadolu Jet','Turkish Airlines','Pegasus Airlines', 'Turkish Airlines','Onur Air','Anadolu Jet','Turkish Airlines','Turkish Airlines','Turkish Airlines','Lufthansa','Delta','Turkish Airlines','Anadolu Jet','Turkish Airlines', 'Anadolu Jet','Onur Air','Atlas Global','Lufthansa','Turkish Airlines','Onur Air','Pegasus Airlines','Turkish Airlines','Anadolu Jet','Turkish Airlines','Pegasus Airlines','Turkish Airlines','Anadolu Jet','Turkish Airlines','Turkish Airlines'};

[labels, count] = uniq_c (airlines)

给出答案：

labels = 
{
  [1,1] = Anadolu Jet
  [1,2] = Atlas Global
  [1,3] = Delta
  [1,4] = Lufthansa
  [1,5] = Onur Air
  [1,6] = Pegasus Airlines
  [1,7] = Turkish Airlines
}
count =

   11    2    1    2    5    6   29

终于把它画出来

bar (count)
set (gca, "xticklabel", labels)

给出：