??? Error using ==> vertcat CAT arguments dimensions are not consistent.

i want a help to figure out this error named

??? Error using ==> vertcat
CAT arguments dimensions are not consistent.
  in these specific lines

for j = 2:n-1

a1 = [difference_red(i-1,j-1) difference_red(i-1,j) difference_red(i-1,j+1) difference_red(i,j-1) difference_red(i,j) difference_red(i,j+1) difference_red(i+1,j-1) difference_red(i+1,j) difference_red(i+1,j+1)];

b1 = [difference_blue(i-1,j-1) difference_blue(i-1,j) difference_blue(i-1,j+1) difference_blue(i,j-1) difference_blue(i,j) difference_blue(i,j+1)
difference_blue(i+1,j-1) difference_blue(i+1,j) difference_blue(i+1,j+1)];

c1 = [difference_green(i-1,j-1) difference_green(i-1,j) difference_green(i-1,j+1) difference_green(i,j-1) difference_green(i,j) difference_green(i,j+1) difference_green(i+1,j-1) difference_green(i+1,j) difference_green(i+1,j+1)];

a2 = a1(a1<=0.7);

b2 = b1 (b1<= 0.7);

c2 = c1 (c1<=0.7);

med_red (i,j)= median (a2);

med_blue (i,j)= median (b2);

med_green (i,j)= median (g2);

      end

[Jan]

Please use proper code formatting as explained in the link "Markup help" on this page.

Answer 1

[Jan]

Please post the line in which the error occurs.

The VERTCAT command is called implicitely if you use "[...]". I guess you have a linebreak inside, which is interpreted as a semicolon (ugly!). Then use this notation: a1 = [difference_red(i-1,j-1), difference_red(i-1,j), ... difference_red(i+1,j+1)]; Insert commas and use the line continuation "...".

Answer 2

[prem preet]

thnx for your suggestion ... i appreciate it ...

[Jan]

Does it solve your problem? Then accepting the answer would be the signal, that others do not have to help anymore.