Match numbers to allocate text

2 views (last 30 days)
SChow
SChow on 8 Aug 2022
Answered: David Hill on 8 Aug 2022
Hi,
I am struggling to match numbers to assign a corresponding string. For example,
I have an array
x=[A 12
B 13
C 19
D 21]
and another array
y= [12 13 19 24 21 12 12]
I would prefer to get
z=[12 A
13 B
19 C
24 NaN
21 D
12 A
12 A]
Any help is appreciated

Accepted Answer

Karim
Karim on 8 Aug 2022
you can use the categorical command to do this:
y = [12 13 19 24 21 12 12]';
B = categorical( y, [12 13 19 21], ["A" "B" "C" "D"] )
B = 7×1 categorical array
A B C <undefined> D A A

More Answers (1)

David Hill
David Hill on 8 Aug 2022
Your could also use a sparse array or an array of nan.
x=[12 13 19 21];
y=[12 13 19 24 21 12 12];
X=nan(1,25);
X(x)='ABCD';
Y=char(X(y))
Y = 'ABC DAA'
x=[12 13 19 21];
y=[12 13 19 24 21 12 12];
X=sparse(1,25);
X(x)='ABCD';
Y=char(full(X(y)))
Y = 'ABC DAA'

Categories

Find more on Characters and Strings in Help Center and File Exchange

Community Treasure Hunt

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

Start Hunting!

Translated by