issue with plotting data

I have graph plotting 4 variables value every update,,,up to i=10 only variables will be plotted and after some time third and fourth vqariables vlaue is plotted on plot,,,for plotting third and forth variable i will make third and fourth variable zero,,,,so problem is wen i plot first and second variables,,,third and fourth variable is also plotted on zero point,,,so how to make third and fourth point visible,,wen those get values?

[Azzi Abdelmalek]

Arun, to clarify what you want, post your code, and explain when you want to plot third, fourth,...,tenth.

[Arun Badigannavar]

x=1:10;
y=1:10;
f1=figure(1);
plot(x,y,'g*')
z=21:30;
plot(x,z,'r*')
This plot replaces (x,y),,,i want keep first plot and again plot(x,z),,

Answer 1

[Suleyman Deveci]

use "hold on" between two plots