Trying to sort a text document by alphabetical order and count how many times a word appears

12 次查看（过去 30 天）

Andy T 2019-11-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/489009-trying-to-sort-a-text-document-by-alphabetical-order-and-count-how-many-times-a-word-appears

评论： Adam Danz 2019-11-3

Hello,

I am trying to take a .txt file, import it, and then count how many times a word appears and then how sort all the words in order.

I want to take the .txt file, make it into a string, chop the string up into individual words, and then put the words into a matrix along with there word count.

Take the following sentance as an example, "The cat is a cat and would like to have a cat."

The output would look like the following:

word:a                    count:2    
word:and                  count:1
word:cat                  count:3
word:have                 count:1
word:like                 count:1  
word:the                  count:1 
word:to                   count:1
word:would                count:1

Here is what I have right now.

fid = fopen('Theodore_Roosevelt_The_Duties_Of_American_Citizenship.txt'); 
Line = fgetl(fid); 
textfile = strings(1,1); 
k = 1; 
while ischar(Line) textfile(k,1) = Line; 
    Line = fgetl(fid); 
    k = k+1; 
end 
fclose(fid); 
 %removing all nonAlpha characters from the text file 
punc = [".",";",",","(",")","--","-",]; 
textfile = replace(textfile,punc," "); 
textfile=lower(textfile); 
%for loop is used to split string 'textFile' into individula words 
words = strings(0); 
for i = 1:length(textfile) 
    words = [words;split(textfile(i))]; 
end 
k=convertStringsToChars(words); 
h=1;
F=2;
G=1;
sorted=zeros(1);
for j = 1:length(k)  
        T=strncmp(k(h),k(F),1); 
        if T==1 
        %if true, put h word in sorted before word F 
        sorted=sorted(k(h),G); 
        G=G+1; 
        sorted=sorted(k(F),G); 
        end 
    h=h+2; 
    F=F+2; 
end 
disp(sorted)

This is the error I get when executing the code:

Error using sort

Input argument must be a cell array

of character vectors.

Error in sorted (line 28)

[ignored,index] =

sort([meshsites(:).' sites(:).']);

Error in fgetltest (line 35)

sorted=sorted(k(h),G);

This is for a homework question, but I am lost about this matrix part I want to put it in.

3 个评论
显示 1更早的评论隐藏 1更早的评论

Walter Roberson 2019-11-3

I do not see an initialization for G ?

Andy T 2019-11-3

编辑：Andy T 2019-11-3

the matlab is 2019, I also forgot to put those in there when I was putting the code into the question. Let me fix that. I also forgot to even make a vector called sorted.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Adam Danz 2019-11-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/489009-trying-to-sort-a-text-document-by-alphabetical-order-and-count-how-many-times-a-word-appears#answer_399604

编辑：Adam Danz 2019-11-3

Here's a different approach. See inline comments for details.

% Read text
C = fileread('Theodore_Roosevelt_The_Duties_Of_American_Citizenship.txt'); 
% Split into words by spaces
words = strsplit(strtrim(C)); 
% Remove problematic characters
% But be careful: this removes any non-letter from each word. 
% cat's turns into cats; But without this "cats" with quotes 
% or cats! will not be recognized.  If that's a problem you'll
% need to use a regular expression approach. 
words = cellfun(@(x)x(isletter(x)), words, 'UniformOutput', false);
% make all letters lower case 
words = lower(words); 
% sort them into alphabetical order
words = sort(words); 
% Count frequency of each word
wordList = unique(words); 
wordCount = histcounts(categorical(words), categorical(wordList)); 
% Output table
T = table(wordList(:), wordCount(:), 'VariableNames', {'Word', 'Count'}); 