converting categorical array to cell array

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Boy
Boy 2016-4-8
编辑： cui,xingxing 2024-4-27
Hi all, I am trying to convert a categorical array to a cell array so that I can use the strrep function, but i cant seem to find anyway to do it after scouring the web to the best of my abilities. My categorical column contains string that have the '_' character and i want to search the column and replace any string that has '_' with '-'. Is there any way I can do it without converting the datatype? Any help would be greatly appreciated. Thank you

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Fangjun Jiang
Fangjun Jiang 2016-4-8
a=nominal({'R_','G_','B_'});
b=cellstr(a);
c=strrep(b,'_','-');
d=nominal(c)
d =
R- G- B-
  2 个评论
Boy
Boy 2016-4-8
移动：Fangjun Jiang 2024-1-8
Thank you for the quick response Fangjun. But i have a dataset where column 3 is nominal datatype. Can i change the entire column from nominal to cell array? Thank You
Salma Hassan
Salma Hassan 2017-12-24
移动：Fangjun Jiang 2024-1-8
C = cellstr(A) check this link https://www.mathworks.com/help/matlab/ref/cellstr.html

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更多回答（1 个）

cui,xingxing
cui,xingxing 2024-1-6
编辑：cui,xingxing 2024-4-27
Ran in:
@Fangjun Jiang update new workflow.
a=categorical({'R_','G_','B_'});
b=string(a);
c=replace(b,'_','-');
d=categorical(c)
d = 1×3 categorical array
R- G- B-
BTW, Convert categorical array to cell array in general way Example.
A = categorical(["A","B","C","D","hello","world"]) % categorical array
A = 1×6 categorical array
A B C D hello world
dst = num2cell(A) % cell array
dst = 1×6 cell array
{[A]} {[B]} {[C]} {[D]} {[hello]} {[world]}
if A is a complex arrays,also can use mat2cell function.
A = categorical(["A","B","Hello","world .";
"1","2","3","四"])
A = 2×4 categorical array
A B Hello world . 1 2 3 四
dst = mat2cell(A,[1,1],[2,1,1])
dst = 2×3 cell array
{[A B]} {[Hello]} {[world .]} {[1 2]} {[3 ]} {[四 ]}
-------------------------Off-topic interlude, 2024-------------------------------
I am currently looking for a job in the field of CV algorithm development, based in Shenzhen, Guangdong, China,or a remote support position. I would be very grateful if anyone is willing to offer me a job or make a recommendation. My preliminary resume can be found at: https://cuixing158.github.io/about/ . Thank you!
Email: cuixingxing150@gmail.com

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