Combining 2 command, difficulty to combine plot in a single x and y range.

HI I have diifficulty on combining 2 plot here in a single x and y coordinates. I got erros when i combine these 2 plots.

Basically i want a plot horinzontal from 0 to 2e9 at -12 and 2.1e9 to 11.1e9 with the equation.

x=[0.01e9,2e9];

y=[-12,-12];

hold on

plot(x,y,'-.or')

x=(2.1:0.1:11.1)*1e9;

y=[-6.68+12.1*log10(x/1e9/5.5)];

hold on

plot(x,y,'-.or')

[madhan ravi]

What do you mean not the same??

[zahrein yaacob]

Hi Ravi, Sorry for the confusion. Basically i want to combine this plot into a single x and y range. I tried the below equation, but fail to understnad the errror. Can help? Appreciate your feedback.

x=[0.01e9,2e9,(2.1e9:11.1e9)];

y=[-12,-12,-6.68+12.1*log10(x/1e9/5.5)];

hold on

plot(x,y,'-.or')

[KSSV]

YOu are creating huge array.....whats the necessity for that?

[zahrein yaacob]

Should be fine in a log scale.