Error for loop trough cell array

Hello I have this 1x10 cell array named ticker_list: ('GE' 'BAC' 'VALE' 'AMD' 'PFE' 'F' 'INTC' 'NOK' 'BABA' 'UL') and I have to make the for loop through every cell take the data from yahoo finance and plot. When I run the code below i receive an error and the plotting stops at the sixth security. The error is:

if true
c=yahoo;
for sec = 'ticker_list'
field      = 'adj Close';             
date_begin = datenum(2012,12,31);   
date_end   = datenum(2016,12,31);  
d = fetch(c,sec,field,date_begin,date_end);
figure('Name','Closing Price');
plot(d(:,1),d(:,2),'LineWidth',2);
datetick;title('Closing price');ylabel('USD');
end

Error using yahoo/fetch (line 387)
Unable to return historical data for given security.
Error in untitled (line 7)
d = fetch(c,sec,field,date_begin,date_end);

Answer 1

[Guillaume]

" the plotting stops at the sixth security"

for sec = 'ticker_list'

iterates over the characters of the char array 'ticker_list' (so sec is at first 't', then 'i', etc.). The sixth character is '_'. I assume that 't', 'i', etc. can be matched to a ticker, but not '_'. Of course, none of this is what you want. I suspect your code should be

for sec = ticker_list   %iterate over the columns of the cell array instead of characters of a string
   %...
   d = fetch(c, sec{1}, field, date_begin, date_end);

Note: Learn to use the debugger. Had you used it and stepped through your code as it executed, you would have noticed the problem immediately.