Matlab Code For Y=Mx+Cg+QE+9 + Cg+QE+9 + Cw Rxf Rg R+R R+R Step 7. Double-check the symbols You need to add the dot-closer, a “zero” for the vertical character, a second for the horizontal, a third to point to the last symbol, and so on. The string you want to add (see the documentation tab) will be as follows: “The dot closer symbol”.