mean of each column entry

2 次查看（过去 30 天）
Blazej Dobija
Blazej Dobija 2021-2-6
评论： Cris LaPierre 2021-2-6
I have 2 arrays colA and colB, how can I get for example mean or other statistic of each entry of colB
I need to get something like this:
x = [-3084 -3085 -3086 -3087 etc]
y = [meanOfEachColB(-3084) meanOfEachColB(-3085) meanOfEachColB(-3086) meanOfEachColB(-3087) etc]
colA colB
+13884 -3084
+13884 -3082
+13864 -3084
+13892 -3086
+13848 -3084
+13776 -3086
+13940 -3085
+13792 -3085
+13856 -3084
+13908 -3082
+13888 -3086
+13884 -3085
+14004 -3086
+13860 -3084
+13860 -3082
+13856 -3082
+13860 -3083
+13840 -3085
+13908 -3083
+13772 -3084
+13764 -3085
+13920 -3085
+13904 -3086
+13944 -3085
+13900 -3086
+13912 -3086
+13852 -3086
+13964 -3087
+13944 -3083
+13908 -3085
+13848 -3085
+13860 -3083
+13984 -3084
+13936 -3086

请先登录，再回答此问题。

采纳的回答

Cris LaPierre
Cris LaPierre 2021-2-6
I'd look into grpstats. See this example.
meanA = grpstats(colA,colB,'mean')
Another option is to use groupsummary. This might be helpful because it also returns the groups.
[meanA,grpB] = groupsummary(colA,colB,'mean')
  2 个评论
Blazej Dobija
Blazej Dobija 2021-2-6
编辑：Blazej Dobija 2021-2-6
[meanA,grpB] = groupsummary(colA,colB,'mean')
this work great, thanks
PS. it there any similar function for "mean 95 confidence interval"?
Cris LaPierre
Cris LaPierre 2021-2-6
I'm not aware of a mean function in MATLAB that also returns a confidence interval. However, you can do this manually using the mean and standard deviation of each group. Perhaps this post can help you get started.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Random Number Generation 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by