Remove numbers during preprocessing

4 次查看（过去 30 天）
Rachele Franceschini
评论： Ergin Sezgin 2022-9-30
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');

请先登录，再回答此问题。

回答（1 个）

Ergin Sezgin
Ergin Sezgin 2022-9-30
Ran in:
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
  2 个评论
Rachele Franceschini
Rachele Franceschini 2022-9-30
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
Ergin Sezgin 2022-9-30
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?

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Cell Arrays 的更多信息

标签

产品


版本

R2021b

Community Treasure Hunt

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

Start Hunting!

Translated by