my code output is right but my graph gives me nothing it's blank and I don't know why it wont work there are no error just gives a graph with nothing on it

the fprintf's are correct its just the plot that won't work and the goal is to plot time on the x and stocks owned on the y which are the vectors called time and stock

Answer 1

[VBBV]

Use loop index

if Price(i) < buy
stock(i) = stock(i)+25;  % use loop index 
...
elseif sell < Price(i)
 stock(i) = stock(i) - 50; % use loop index
else
 stock(i) = stock(i)+0;
end

[VBBV]

% before start of the loop
stock = zeros(1,length(price));  % allocate a vector
stock(1) = 200;  % starting stock