how to add specific columns in table (in verse)

2 次查看（过去 30 天）
Daniel Cisek
Daniel Cisek 2022-12-7
编辑： Stephen23 2022-12-7
I have a table T1 in cell that looks like this (values are double):
T1 =
Ligota1 Ligota2 Orzesze1 Orzesze2 Tychy1 Tychy2
_______ _______ ________ ________ _________ _________
1 2 3 4 5 6
7 8 9 1 2 3
4 5 6 7 8 9
0 1 2 3 4 5
6 7 8 9 0 10
How to add table rows omitting specific columns e.g. names begining with 'Ligota'. I tried to do it with varfun and rowfun functions with no luck. I was able to sum only the rows of all columns:
sum(T1{:,:},2);

请先登录，再回答此问题。

采纳的回答

Jiri Hajek
Jiri Hajek 2022-12-7
Hi,
you've righly spotted the subtle difference parentheses vs curly braces ("Curly braces, {}, returns an array concatenated from the contents of selected rows and variables.", see here). So it is sufficient to tell the summation operator, which columns to sum (let's say 2nd and 4th):
sum(T1{:,[2,4]},2);
  4 个评论
显示 2更早的评论
Stephen23
Stephen23 2022-12-7
编辑：Stephen23 2022-12-7
Although code golf is popular, for clarity and ease of debugging you could use two lines and logical indexing:
X = contains(T1.Properties.VariableNames,"Ligota");
S = sum(T1{:,~X,2)
Daniel Cisek
Daniel Cisek 2022-12-7
Thanks Stephen23. I always try to compress code as much as possible. Maybe it's time to think about how to write it transparently.

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 Matrices and Arrays 的更多信息

标签

产品


版本

R2018b

Community Treasure Hunt

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

Start Hunting!

Translated by