How to extract rows from a table based on the categories present in one of the columns?

18 次查看（过去 30 天）
Ildefonso Vicente Suarez
评论： Esperanza Linares Guerrero 2020-6-22
I have created a table that has double and categorical columns.How can I extract the rows that correspond to each one of the categories?
Being more specific, the table is called 'Plate' and one of the columns 'Invivo'.
If I write
categories(Plate.Invivo);
The answer gives me three categories
'Drug'
'Positive control'
'mock'
If I write
b=Plate(Plate.Invivo=='Drug',:);
The answer is a table with 0 rows and the same number of columns as the original table. Why it can not find the rows that correspond with the categorie 'Drug'?
Thanks a lot for your help

请先登录，再回答此问题。

采纳的回答

Esperanza Linares Guerrero
The reason why you are getting an empty array, is because your category is not Drugs, it is 'Drugs' (between quotes). You can remove the quotes from the table and the command would work, or, you can define a variable that contains the quotes:
a=Plate.Invivo(end);%%% Checking your table, the last row has the 'Drugs' category
b=Plate.Invivo(Plate.Invivo==a,:)

更多回答（1 个）

KSSV
KSSV 2020-6-19
编辑：KSSV 2020-6-19
b=Plate(strcmp(Plate.Invivo,'Drug'),:);

类别

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