MATLAB Programming Fundamentals - MathWorks

summary(Location)

County General Hospital 39

St. Mary's Medical Center 24

VA Hospital 0

The patients observed at VA Hospital are deleted from Location, but VA Hospital is

still a category.

Use the removecats function to remove VA Hospital from the categories of

Location.

Location = removecats(Location,'VA Hospital');

Verify that the category, VA Hospital, was removed.

categories(Location)

ans = 2x1 cell array

{'County General Hospital' }

{'St. Mary's Medical Center'}

Location is a 63-by-1 categorical array that has two categories.

Delete Element

You can delete elements by indexing. For example, you can remove the first element of

Location by selecting the rest of the elements with Location(2:end). However, an

easier way to delete elements is to use [].

Location(1) = [];

summary(Location)

County General Hospital 38

St. Mary's Medical Center 24

Location is a 62-by-1 categorical array that has two categories. Deleting the first

element has no effect on other elements from the same category and does not delete the

category itself.

Check for Undefined Data

Remove the category County General Hospital from Location.

8 Categorical Arrays