Matlab for loop trouble -

i'm trying understand loops better in matlab since reason don't work other languages.

values = zeros(1,7); =[1, 4, 10, 15, 22, 24, 36]         variable = function(input, input, i);         values(i) = function(input, variable); end 

so values becomes 1x36 double i results, number isn't gets column set 0. why still add columns values didn't choose i?

thanks

you preallocating values 7 entries. when assign value @ entry 10, entries 8 , 9 must created too, , matlab fills them 0.

here's example:

>> clear >> values = ones(1,7) % preallocate ones values =      1     1     1     1     1     1     1 >> values(4) = 40 values =      1     1     1    40     1     1     1 >> values(10) = 100 % array have grow values =      1     1     1    40     1     1     1    0     0   100 

note having array growing not desirable, negatively impacts speed. it's better preallocate final size, whenever known in advance.

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thanks @steve edit

if want results stored in consecutive entries, consider using counting variable, e.g. k indexing increases 1 each step of loop.

values = zeros(1,7); % k stores number of steps of loop k = 0; =[1, 4, 10, 15, 22, 24, 36]         % increment k         k = k+1;         variable = function(input, input, i);         values(k) = function(input, variable); end