Remove numbers during preprocessing

I would like to remove numbers within text. I have this function or script for the preprocessing, how I can remove all numbers?

%Create Co-occurence Network for only class1 and 0 5%
data = dataone.text;
%textdata = data.text;
data = randsample(data,100)
%data=data(1:100,1)

documents = preprocessText(data);

bag = bagOfWords(documents);
bag1 = removeInfrequentWords(bag,2);
counts = bag1.Counts;
cooccurrence = counts.'*counts;
G = graph(cooccurrence,bag1.Vocabulary,'omitselfloops');

Answer 1

[Ergin Sezgin]

Hello Rachele,

Try using the following code with your string array.

words = ["stringOne", "stringTwo", "2022", "stringThree"]

words = 1×4 string array
    "stringOne"    "stringTwo"    "2022"    "stringThree"

doubleArray = str2double(words)

doubleArray = 1×4

NaN NaN 2022 NaN

nanIdx = isnan(doubleArray)

nanIdx = 1×4 logical array
   1   1   0   1

wordsArray = words(1,nanIdx)

wordsArray = 1×3 string array
    "stringOne"    "stringTwo"    "stringThree"

Good luck

[Rachele Franceschini]

Thank you for your suggest, but I am not sure. I corrected my question, maybe the preprocessing function it was not clear. I tried your script, but I have had some problem of error ('The logical indices in position 2 contain a true value outside of the array bounds.') on second-to-last.

[Ergin Sezgin]

If the issue is with a char array, its possible to remove all numbers from it, checking each element by an explicit loop or vectorization. If there are multiple char elements in a container, same method should also work after some additional steps are added. Could you please share some of the data?