Not able to excecute the code

2019 6 21
2 个回答
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更新时间：2019 7 4
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0 个投票

I am trying to execute following codes :
rows={'A','B'};
data = cell(0,5);
T = cell2table(data);
T.Properties.RowNames = rows;
Matlab is throwing an error :The RowNames property must contain one name for each row in the table.
Can anybody comment if I am missing anything? I will appreciate any help.

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 采纳的回答

Aravind Ravikumar
Aravind Ravikumar 2019-6-21

0 个投票

Hey, cell(0,5) returns a 0x5 empty cell array. That is why row number isn't matching with rows variable. You should use You can simply create a cell array using the command,
data = {0,5}
Also, in this example data is a 1x2 cell array. Hence it has only one row. To change that row name, you could do something like,
rows={'A'};
data = {0,5};
T = cell2table(data);
T.Properties.RowNames = rows;
For creating a 2x1 cell array, you'll have to use
rows={'A','B'};
data = {0;5};
T = cell2table(data);
T.Properties.RowNames = rows;

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Rajeev Kumar
Rajeev Kumar 2019-7-3
Thanks very much for correcting the code. However I have stuck in one implementation where I want to create a table with just column and row name. I am trying in the following way
Step1 : tab1 = cell2table(...) ; tab2=cell2table(...) ;tab3=cell2table(...)
Step2 : table = [tab1 tab2 tab3]
step3 : table..Properties.RowNames = x_name ; x_name is a cell array of specied element (say it is of size 1x20)
This is throwing the following error : The RowNames property must contain one name for each row in the table. Can I create a table with only rows and column name?
Walter Roberson
Walter Roberson 2019-7-3
No. You must have at least one column of value along with the row name, and that column must have as many rows as you have row names.
Walter Roberson
Walter Roberson 2019-7-3
Further testing shows that to be incorrect: You can have rownames even with now columns.
What is showing up as size(table) ?
Rajeev Kumar
Rajeev Kumar 2019-7-4
Thanks Walte size. Here is the result:
size(table)=0x3
h=table.Properties.VariableNames
h =
1×3 cell array
{'tab1'} {'t'ab2} {'tab3'}
Could you please comment on this?
Walter Roberson
Walter Roberson 2019-7-4
With 0 rows you must have 0 row names.

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Akshay Malav
Akshay Malav 2019-6-21
编辑：Akshay Malav 2019-6-21

0 个投票

First change the number of rows from 0 to 1 and correspondingly the rows array should contain only 1 element either 'A' or 'B'. Run it , it will work fine
Here is the code
rows={'A'};
data = cell(1,5);
T = cell2table(data);
T.Properties.RowNames = rows;

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Walter Roberson
Walter Roberson 2019-6-21
Right. You can only have a row name for a row that exists. You cannot put in placeholder row names for rows to be added later.

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