Error when assigning categories to a tall array
3 views (last 30 days)
Show older comments
Peng Li
on 25 Mar 2020
Commented: Sean de Wolski
on 14 Apr 2020
I ran into a wiered problem for me as when I tried to assign categories to a tall array, it failed while it went through if I used the gathered version. See attached a small dataset as a test dataset (only 100 strings), and below a working example:
% test
load('testSmall.mat');
code = "1";
meaning = "test";
res = categorical(testSmall, code, meaning); % ok
testTall = tall(testSmall);
res2 = categorical(testTall, code, meaning); % error occurred
The error message:
Error using categorical (line 528)
VALUESET must be numeric when DATA is numeric.
Error in tall/categorical>iGetOutputAdaptor (line 89)
localData = categorical([], extraArgs{:}, varargin{idx:end});
Error in tall/categorical (line 44)
outAdaptor = iGetOutputAdaptor(tdata,varargin{:});
It happened that when I nevigate into the categorical function, the first parameter (inputData) was always empty when I use the tall array testTall as the input. Why this happens?
0 Comments
Accepted Answer
Sean de Wolski
on 31 Mar 2020
That also appears to be a bug in how tall handles scalar strings for cats and values. If you make code and meaning into vectors it works fine. Here I give them a dummy value:
code = ["1" "2"];
meaning = ["test" "answer"];
res = categorical(testSmall, code, meaning); % ok
testTall = tall(testSmall);
res2 = categorical(testTall, code, meaning);
I'll report this one to development as it's completely reproducible.
11 Comments
Sean de Wolski
on 14 Apr 2020
I have not. I just checked my spam filter as well and verified that the email from the MATLAB command above works.
More Answers (0)
See Also
Categories
Find more on Multidimensional Arrays 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!