How can I write a function for this

I finally wrote a simple code to plot two slope lines but the problesm is when I run it the next slope line begins a bit high then the first one. How can I fix that like the graph belowe?

K1 = 3;

K2 = 8;

Idff1 = 20;

endline=100;

XIntersect=50;

IB =[];

ID = [];

for Ibias=0:endline

if Ibias<=XIntersect

Idiff = Idff1 + K1 * Ibias;

ID=[ID, Idiff];

IB = [IB, Ibias];

else

Idiff = K2 * Ibias;

ID=[ID, Idiff];

IB = [IB, Ibias];

end

end

plot(IB, ID);

[darova]

Please crop the image

Answer 1

[John D'Errico]

Use plotregion, found on the file echange.

https://www.mathworks.com/matlabcentral/fileexchange/9261-plot-2d-3d-region

Note that an if/else clause will be of little value for this purpose. But I suppose you can do anything you want, if you really, desperately need to use if/else.