Plotting on Secondary y-axis and scaling

I'm trying to plot the following:

clear
clf

hold on

A = [0.1:0.1:1];
B = 100000./(A);
for i=1:length(A)
E(i) = 1842;
end

plotyy(A,E,A,B)
%Can clearly see both primary and secondary y-axis and x-axis without issue

A = [1:1:30];
B = 100000./(A);
for i=1:length(A)
E(i) = 1842/A(i);
end

plotyy(A,E,A,B)

After this point I can no longer clearly see both primary and secondary y-axis plots easily, and the x-axis overwrites itself any suggestions?

Answer 1

[Grzegorz Knor]

Let's try it this way:

clear
clf

A1 = 0.1:0.1:1;
B1 = 100000./(A1);
E1 = nan(size(A1));
for i=1:length(A1)
    E1(i) = 1842;
end

A2 = 1:1:30;
B2 = 100000./(A2);
E2 = nan(size(A1));
for i=1:length(A2)
    E2(i) = 1842/A2(i);
end

plotyy([A1 A2],[E1 E2],[A1 A2],[B1 B2])

[Shawn]

Thank you Grzegorz for your answer it is greatly appreciated, I had one follow up question. Let say I have one more segment I want plotted I tried:

A3 = [30:1:100];

B3 = 100000./(A3);

E3 = nan(size(A1));

for i=1:length(A3)

E3(i) =61.4;

end

hold

plotyy([A2 A3],[E2 E3],[A2 A3],[B2 B3])

but this overwrites the x-axis again, and generated a new line instead of continuing from where the above code left off.

[Grzegorz Knor]

Do not use hold on, just:

plotyy([A1 A2 A3],[E1 E2 E3],[A1 A2 A3],[B1 B2 B3])

[Shawn]

Thank you so much Grzegorz for your help.

[Shawn]

Follow up question: http://www.mathworks.com/matlabcentral/answers/27529-plotyy-x-axis-overwritting-with-two-plotyy-graphs-and-legend-issues