Merge rows with similar names

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Vlatko Milic
Vlatko Milic il 22 Ott 2021
Commentato: Vlatko Milic il 27 Ott 2021
I have a table consisting of ten columns. In the first column, each row has a unique name. However, many rows have the same starting four letters. I would like to merge the rows with the same starting letters, and perform some calculations based on these rows.
Thanks in advance!
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Vlatko Milic
Vlatko Milic il 22 Ott 2021
I mean concatenate. I.e. to group the into the same rows, or vectors. I know how to do it if I had the same row names all over, however, it is only in the beginning the row names are the same.
Thanks Stephen
Image Analyst
Image Analyst il 22 Ott 2021
@Vlatko Milic, you keep forgetting to attach your data in a .mat file with the paperclip icon. Here's another chance to read the posting guidelines:

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Pranjal Kaura
Pranjal Kaura il 26 Ott 2021
Hey Vlatko,
It's my understanding that you want to group/merge rows with similar names. The criteria for 'similarity' is that they must have the same first 4 letters. You also mention that you know how to merge/group these rows when using complete row names for judging similarity, but are facing issues while merging using only a subset of the row name.
Here is a code snippet using which you can identify which rows are similar, using only the first 'n' letters. This will provide you with a number (say group number) for every row. 'Similar' rows would have the same number You can then merge them using your custom code.
A = ["Pizza", "Hello", "Hellbound", "Yesterday", "Yesss", "Yesman"]; % your first column
n = 3; %number of initial alphabets to consider
A2 = extractBetween(A(:), 1, n);
A_groups = unique(A2);
[~,A_groupNum] = ismember(A2, A_groups) %this will assign a number to every row. Similar rows would have the same number
Hope this helps!
  1 Commento
Vlatko Milic
Vlatko Milic il 27 Ott 2021
Hi Pranjal,
That is exactly what I was looking for. Thanks a lot for your thorough answer and your time.
Kind regards

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