saving a changing variable into one table on a different row each time.

I think the question is self explanatory. I have a variable (say n_value) which changes value with a loop. How would you save it into one mat file (a table of values) with a new row for each value of the same variable? This way I can then call the variables again by using just one table. Thanks

Answer 1

[Thomas]

you need to save the value in a for loop This video should help:

http://blogs.mathworks.com/videos/2007/08/20/matlab-basics-video/

You can save the output in a vector or matrix as shown,

Eg:

for i=1:10
y(i)=i+rand;  % use y(i) so that it is written as a vector
end

or you could use:

 % preallocate variable here
  for i=1:10
  z=[z i+rand];
  end

both should give you similar results..

[Guillermo Lopez]

This works perfectly! And to save two variables?? I have a global variable that changes value each loop too, and i would like to save it just beside the other values say in a different column. So just like you did before saves on one column, but saving two different variables, in two separate columns...is taht possible? Would I need to do two different for loops?

Thanks a lot!!!

[Thomas]

for two variables, you could save it in the save for loop with different variable name:

for i=1:10

y(i)=i+rand; % variable 1

m(i)=i^2+rand; %variable 2

end

you have two vectors of output variables y and m

[Guillermo Lopez]

But this wouldn't save it on the same matrix would it?