Make matlab save results to the same table but different rows

Hi I got a while loop that calculates the size of a vector for several columns of data. I was wondering if there is a method to save all the outputs to one table in different rows. Many thanks in advance.

Answer 1

[Adam Danz]

I would store the values within the while loop and then convert the array to a table using array2table.

rng('default')
x = []; 
z = rand(); 
while z > .01
    x(end+1) = z; 
    z = rand(); 
end
T = array2table(x(:),'VariableName',{'myVar'})

T = 122×1 table
     myVar 
    _______

    0.81472
    0.90579
    0.12699
    0.91338
    0.63236
    0.09754
     0.2785
    0.54688
    0.95751
    0.96489
    0.15761
    0.97059
    0.95717
    0.48538
    0.80028
    0.14189

[Thor]

How would this change of I had 4 variables?

[Adam Danz]

rng('default')
x = []; 
z = rand(1,4); 
while any(z > .05)
    x(end+1,:) = z; 
    z = rand(1,4); 
end
T = array2table(x,'VariableName',{'v1','v2','v3','v4'})

T = 105919×4 table
      v1          v2          v3          v4   
    _______    ________    ________    ________

    0.81472     0.90579     0.12699     0.91338
    0.63236     0.09754      0.2785     0.54688
    0.95751     0.96489     0.15761     0.97059
    0.95717     0.48538     0.80028     0.14189
    0.42176     0.91574     0.79221     0.95949
    0.65574    0.035712     0.84913     0.93399
    0.67874     0.75774     0.74313     0.39223
    0.65548     0.17119     0.70605    0.031833
    0.27692    0.046171    0.097132     0.82346
    0.69483      0.3171     0.95022    0.034446
    0.43874     0.38156     0.76552      0.7952
    0.18687     0.48976     0.44559     0.64631
    0.70936     0.75469     0.27603      0.6797
     0.6551     0.16261       0.119     0.49836
    0.95974     0.34039     0.58527     0.22381
    0.75127      0.2551     0.50596     0.69908

[Adam Danz]

BTW if you know the number of iterations, it's much better to use a for-loop and preallocate your loop variable.

For example,

rng('default')
n = 10; 
x = nan(n,4); 
for i = 1:n
    x(i,:) = rand(1,4);  
end
T = array2table(x,'VariableName',{'v1','v2','v3','v4'})

T = 10×4 table
      v1          v2          v3          v4   
    _______    ________    ________    ________

    0.81472     0.90579     0.12699     0.91338
    0.63236     0.09754      0.2785     0.54688
    0.95751     0.96489     0.15761     0.97059
    0.95717     0.48538     0.80028     0.14189
    0.42176     0.91574     0.79221     0.95949
    0.65574    0.035712     0.84913     0.93399
    0.67874     0.75774     0.74313     0.39223
    0.65548     0.17119     0.70605    0.031833
    0.27692    0.046171    0.097132     0.82346
    0.69483      0.3171     0.95022    0.034446

[Thor]

If I post my code would you be able to take a look. I have attempted your method, but I think I am doing something wrong. Thanks for your contribution

[Adam Danz]

Sure, include only the relevant sections, describe the size of your data, and share any error messages you're getting.

[Thor]

I figured it out after changing the names of my variables. Thanks a lot for the examples.