how to save each loop data

I have a for loop, but every iteration overwrites the variable and I have only the final data left..

where p is an array p=[1:1:20]' how can I save data from every loop saves only the last value when 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 . how do I get the other values?

Answer 1

[Chad Greene]

There are several ways to do this. One way is to make a counter, and increment that counter each time through the loop:

p=[1:1:20]'; 

k = 0; % <-start a counter
for x=.1:.1:1 
   k=k+1; % <-increment the counter 
   q(:,k)=x.*p; % <- log the result
end

Another way is very similar, but some would say better coding style:

p=[1:1:20]'; 
x=.1:.1:1; 

for k = 1:length(x) 
   q(:,k) = x(k).*p; 
end

Or of course if all you need is the cross product you can skip the loops altogether:

p=[1:1:20]'; 
x=.1:.1:1; 
q = p*x;

[abdul asad]

it works... thanks for your help

[Afraz MEHMOOD CHAUDHRY]

for me second option worked easily. Thanks Chad!