Use cell arrays:
numsec = ('Enter the number of securities in Portfolio: ');
numsec = input(numsec)
Security = cell(numsec,1);
SecurityWt = nan(numsec,1);
for ns = 1:numsec
securityNumberString = num2str(ns);
Security{ns} = input(['Enter Security ',securityNumberString,' Ticker: '],'s');
SecurityWt(ns) = input(['Enter Security ',securityNumberString,' Weight (ex: .25): ']);
end
Notice that Security is a cell array, convenient for storing text. SecurityWt is a numeric array. Pay attention to where I used curly brackets instead of parentheses.
