How do I take a large table, split it into smaller chunks, and add them to a new table?

1 次查看（过去 30 天）
ampaul
ampaul 2017-7-14
回答： Peter Perkins 2017-7-18
Hi, I have a 100x5 table. The 100 rows are split evenly into 4 classes (for example, 1:25 = class 1, 26:50 = class 2, and so on). I would like to take the first 10 value from each of the classes in that table to create a new, 40x5 table. Is this possible? This is the code I have now, but it is not set up correctly. Any help is appreciated.
Table40 = Table100([1:10,:],[26:35,:],[51:60,:],[76:85,:]);

请先登录，再回答此问题。

回答（2 个）

Star Strider
Star Strider 2017-7-14
Try this:
v1 = rand(100,1); % Create Data
v2 = rand(100,1); % Create Data
v3 = rand(100,1); % Create Data
v4 = rand(100,1); % Create Data
v5 = rand(100,1); % Create Data
Table100 = table(v1, v2, v3, v4, v5); % Create ‘Table100’
Table40 = Table100([1:25,26:35,51:60,76:85],:); % Create ‘Table40’
Peter Perkins
Peter Perkins 2017-7-18
Another possibility: use repelem to create a variable in the table that indicates the group number. Then call varfun, using that new variabl;e as the grouping variable, and pass varfun a function that returns the first 10 rows of whatever column vector it's given.

类别

在 Help Center 和 File Exchange 中查找有关 Matrices and Arrays 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