Export of string into ASCII file

Hello,

% I have imported some data as txt from an ASCII file (stocks.txt)

Since I created a new variable 'Trade' with its values resulted by a code 'buysell' I want to extract it as the final column in my original ASCII. thus I create 'stocks2.txt' as below:

fid = fopen('ex2.txt','wt');

% Make output string by appending trade decision

outstr = strcat(txt{1},[' Trade';buysell]);

% Write out

fprintf(fid,'%s\n',outstr{:}); fclose(fid);

% Now I try to open (even outside Matlab) the ASCII 'stocks2.txt' but is completely blank.

The new string (outstring)is as expected, but is there any way to export it in a new txt file?

I even tried a simple Copy/ Paste to a new txt file but it doesn't work.

Sorry for the naiveness of the question but as a new user I am slightly confused even with simple applications.

Many thanks,

Panos

Answer 1

[Walter Roberson]

What data class is buysell ? If it is a character array and txt{1} is a string, then the result of the strcat() is going to be a character array instead of a cell array.

There have been cases known where a file closed in Matlab does not become immediately available outside of Matlab. I do not know the solution to that. Which Matlab version are you using?

[Pap]

The codes are:

%Get prices from imported data

Price = data{4};

% Determine which stocks to buy

buy = [true;diff(Price)>=0];

idx = find(~diff(Price));

buy(idx+1) = buy(idx);

% Make string of trade decision

buysell = cellstr(repmat(' Sell',size(Price)));

buysell(buy) = {' Buy'};

I use MatlabR2010a. Is something that I can do?