MATLAB Answers

How to delete duplicates and replace values in an array?

4 views (last 30 days)
Hey, I'm a little stumped on my personal project. I'm trying to have MatLab check a list of ingredients, delete duplicates, and rewrite the remaining ingredient to show how many times its been mentioned. Here's an example:
[("White Onion"),("Potato"),("White Onion"),("Fruit")] -> [("2x White Onion"),("Potato"),("Fruit")]
I know unique() is a command I could use, but how would I rewrite that individual value?

Accepted Answer

Simon Chan
Simon Chan on 20 Aug 2021
Edited: Simon Chan on 20 Aug 2021
Create a table and use function groupsummary
Item=["White Onion";"Potato";"White Onion";"Fruit"];
T=table(Item,'VariableNames',{'Ingredients'});
G = groupsummary(T,"Ingredients","sum")
Result:
G =
3×2 table
Ingredients GroupCount
_____________ __________
"Fruit" 1
"Potato" 1
"White Onion" 2
  3 Comments
Simon Chan
Simon Chan on 20 Aug 2021
Thanks Cris, forgot it is string data.
Use function writetable to put it in a text file
writetable(G,'result.txt')

Sign in to comment.

More Answers (0)

Products


Release

R2021a

Community Treasure Hunt

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

Start Hunting!