String Variables Feeding through a loop & Generating Variables in a loop

Hi I am trying to run a simple program the fetches stock data from yahoo. But I am having two problems 1) In the for loop I am creating, I would like the loop to create a new variable for each stock pulled.

So data_goog, data_aapl,data_hal, etc. (or data_1, data_2...) How do I do that in the loop?

2) In the "get_yahoo_stockdata2()" function the first paramter is the stock ticker. So 'aapl', would be accepted in the first slot of the function. However, when I have the stock in string format fed through the fuction it gives me an error. What am I doing wrong?

CODE: stock_string={'goog','aapl','hal','bp'};

for i=1:length(stock_string) data_stock_string(i)=get_yahoo_stockdata2(stock_string(i),'1/05/2005',datestr(now));

end

Answer 1

[Azzi Abdelmalek]

use stock_string{i}

{ } instead of ( )

stock_string{i} is cell class

stock_string(i) is char class

[Abe]

Hey Azzi,

Thank you very much for the help. But what do I do about generating a new variable every time it does the loop?

Does this work? For i=1:5

variable_{i}=i+5

end

Will create variable_1=6, variable_2=7... etc

[Azzi Abdelmalek]

No it dos'nt

try this code

for k=1:5
eval([sprintf('variable%d=',k) num2str(k+5)])
end

[Azzi Abdelmalek]

but if you do (which is recommanded)

for i=1:5
variable_{i}=i+5
end

that means

 variable_{1}=6
 variable_{2}=7
 variable_{3}=8

Answer 2

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F