MATLAB: I am new to Matlab and I am trying to use some codes which generate some errors. Please help me to correct the following errors: Error: File: sampleStats.m Line: 31 Column: 64 Expression or statement is incorrect–possibly unbalanced (, {, or [.

{error: file: samplestats.m line: 31 column: 64 expression or statement is incorrect--possibly unbalanced (or

function [se ,k,mu ,sk ,mi ,ma ]= sampleStats ( filename , startDate , endDate )
   % Get daily close and date data
   [~,~ , rawData ]= xlsread ( filename ,'','','basic ');
   date_cell = rawData (2: length ( rawData ) ,1);
   close_cell = rawData (2: length ( rawData ) ,2);
   date = zeros (1, length ( date_cell ));
   close = zeros (1, length ( close_cell ));
   % Convert the data to string format
   for i =1: length ( date )
   date (i)= datenum ( cell2mat ( date_cell (i)));
   close_i = cell2mat ( close_cell (i));
   if iscellstr ( close_i )
   close (i)= str2num ( close_i );
   else
   close (i)= close_i ;
   end
   end
   date = fliplr ( date );
   close = fliplr ( close );
   % Convert the date format to a correct one
   date = x2mdate ( date );
   % First and last days of the forecast will be on index
   t1= find (date >= datenum ( startDate ) ,1);
   t2= find (date >= datenum ( endDate ) ,1);
   % Throw errors if data is missing
   if isempty (t1) || isempty (t2)
   msg = cell2mat ( strcat ('Lacking sufficient data in ' ,{' '},
  filename ;', data avaliable for period ’ ,{' '}, datestr ( date (1)) ,{'
  - '}, datestr ( date ( length ( date )))));
   error (msg )
   end
   % Calculate the returns and the logaritmized returns
   r= zeros ( length ( date ) ,1);
   for i=t1 :1: t2
   r(i)= close (i)/ close (i -1);
   end
   logr = log(r);
   % Cut away non relevant days ( those that lack returns and those
  after the
   % period )
   date = date (t1:t2);
   close = close (t1:t2);
   logr = logr (t1:t2);
   se= std( logr );
   k= kurtosis ( logr );
   mu= mean ( logr );
   sk= skewness ( logr );
   mi= min( logr );
   ma= max( logr );
end

Best Answer

The lines
   msg = cell2mat ( strcat ('Lacking sufficient data in ' ,{' '},
  filename ;', data avaliable for period ’ ,{' '}, datestr ( date (1)) ,{'
  - '}, datestr ( date ( length ( date )))));
need to be written all as one line, or you need to use the ... continuation marker.
   msg = cell2mat ( strcat ('Lacking sufficient data in ' ,{' '}, filename ;', data avaliable for period ’ ,{' '}, datestr ( date (1)) ,{'  - '}, datestr ( date ( length ( date )))));
Also, you cannot use semi-colon at that point, as you are not within [] .
Furthermore, if you look very carefully at the character after "for period" it is ’ which is char(8217) which is Right Single Quotation, where you need ' instead.
Putting these together, you get
   msg = cell2mat ( strcat ('Lacking sufficient data in ' ,{' '}, filename ,', data available for period ' ,{' '}, datestr ( date (1)) ,{'  - '}, datestr ( date ( length ( date )))));
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