Assign user defined identifier from one table to another table

Question

Yen Su 2021-1-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/729168-assign-user-defined-identifier-from-one-table-to-another-table

编辑： Siddharth Bhutiya 2021-1-29

Hi,

I have two excel file table; a.xlsx and b.xlsx. In a.xlsx file, identifier is assigned for different weight, height and width data column. The another excel file b.xlsx has also weight, height and width column with other data columns. I would like to assigned identifier of table a.xlsx in to table b.xlsx in new column. Any advice is appreciated.

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

Siddharth Bhutiya 2021-1-29

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/729168-assign-user-defined-identifier-from-one-table-to-another-table#answer_609843

在 MATLAB Online 中打开

You can use outerjoin to do that. Your keys would be the three common variables and since you only want to add the extra identifier variable from a to b, you can specify MergeKeys to be true.

a = readtable('a.xlsx');
b = readtable('b.xlsx');
outerjoin(a,b,'Keys',{'height','weight','width'},'MergeKeys',true)
ans =
  4×7 table
    weight    height    width    identifier    serialNo    age    cost
    ______    ______    _____    __________    ________    ___    ____
     502       101       52           1           1        34     4322
     502       101       53         NaN           4        55     5533
     515       101       53           3           3        43     2344
     515       131       53           2           2        23     5433