Dear Expert this is the MATLAB program for the Detrended fluctuation analysis for a text. There is an error at 'fluctuation(start:finish)=y(start:finish)-trend_segment;'when running the program on Matlab ONLINE I get the following:

Can you help me please here is the program below

%% Import the text from the file filename = "Taking Responsibility for Your Own Actions pdf.docx"; str = extractFileText(filename);

% Preprocess the text by removing punctuation and converting all characters to lowercase str1 = erasePunctuation(lower(str));

% Split the text into individual words str2=split(str1);

%Length of word k=length(str2); lgboxlength; %Number of letters y = cellfun(@strlength,str2);

%Plot the time series x = 1:k; figure(1) plot(x,y) title('Time Series Plot (Number of Letters against Position of Words)') xlabel('Position of words') ylabel('Number of letters') grid on

% DFA parameters numpts=20; llimit=2; rlimit=6; lgboxlength=linspace(llimit,rlimit,numpts); boxlength= floor(10.^lgboxlength);

% Calc Fluctuation for each Boxlength s and calc Fsquared f = zeros(1, numpts); for j= 1:numpts nterms1=boxlength(j); nboxes=floor(kterms1); fluctuation = zeros(1,nboxes*nterms1); trend = zeros(1,nboxes*nterms1); for i=1:nboxes start =(i-1)*nterms1+1; finish=i*nterms1; x=[start:finish]; a=polyfit(x,y(start:finish),1); trend_segment=a(1)*x+a(2); trend(start:finish)=trend_segment; fluctuation(start:finish)=y(start:finish)-trend_segment; end f(j)=sqrt(mean(fluctuation .^2)); end

% plotting the log-log Graph figure(2) plot(log10(boxlength),log10(f),'+k-') title('Detrended Time Series Plot (Number of Letters against Position of Words)') xlabel('Logarithm of box length') ylabel('Logarithm of fluctuation') grid on

Error in Untitled5 (line 47) \[ \text { fluctuation(start:finish)=y (start:finish)-trend_segment; } \] > numericallw1 Unable to perform assignment because the left and right sides have a different number of elements. Error in numericallw1 (line 47) fluctuation (start:finish)=y (start:finish)-trend_segment