Can I use mode for nominal data to calculate most frequent values

Question

Tania 2014-7-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/142940-can-i-use-mode-for-nominal-data-to-calculate-most-frequent-values

评论： Star Strider 2014-7-23

Hey! Is it possible to use mode for nominal data or is there something similar I could use to count my nominal data? Eg. I have tree tree apple . Then it should say tree: 2 times; apple: 1

Thank you!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Star Strider 2014-7-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/142940-can-i-use-mode-for-nominal-data-to-calculate-most-frequent-values#answer_145998

在 MATLAB Online 中打开

This works, although it requires the Statistics Toolbox:

X = categorical({'tree'  'tree'  'apple'});
[K,I] = hist(X)

producing:

K =
       1.0000e+000     2.0000e+000
I = 
      'apple'    'tree'

2 个评论
显示无隐藏无

Tania 2014-7-23

Thank you! the first line makes sense to me, but I dont understand what the [K,I] & the hist(X) does? Thank you!

Star Strider 2014-7-23

My pleasure!

The outputs K and I (arbitrary names) return the counts in K and the names in I of the contents of X that is in this instance a categorical cell array of strings. The Statistics Toolbox implenemtation of hist (histogram counts) for categorical data, counts the occurrences of each category and displays the corresponding names if you want them.

请先登录，再进行评论。