How do I plot a function up to a certain value and start another function at that value for the same plot?

I'm plotting the power on a hydraulic cylinder over the angle of tilt of the beam that the cylinder is pushing. This is the code I have, and for the plot I want the "red line" to stop at a value of 2, and the "blue line" to start at the value of 2. How do I go about this?

Also, is it possible to connect both lines to represent a drop in power?

This is code:

%Calculations for tilting ONLY
AC=2.125;
Fc=8130.0375;
BD=2;
A=0.03^2.*pi;

%Varying angles 
a = 0:45;
Deg=sind(a);
FhN=2.125*Fc*Deg;
Fh=FhN/(BD*2*sind(10));
Ph=(Fh/A)/100000;
P_max=Fh*0.237;
P_rest=Fh*0.147;

% Power on Cylinder for Tilting
figure(1)
subplot(2,2,3)
plot(a,P_max,'r',a,P_rest,'b')
title('Power on HC')
axis([0 inf, 0 inf])
xlabel('Angle')
ylabel('Power [W]')

Answer 1

[Hassaan]

% Calculations for tilting ONLY
AC = 2.125;
Fc = 8130.0375;
BD = 2;
A = 0.03^2 * pi;

% Varying angles
a = 0:45;  % Angle range
Deg = sind(a);  % Sine of angles
FhN = 2.125 * Fc * Deg;  % Normal force
Fh = FhN / (BD * 2 * sind(10));  % Horizontal force
Ph = (Fh / A) / 100000;  % Hydraulic power
P_max = Fh * 0.237;  % Max power
P_rest = Fh * 0.147;  % Resting power

% Determine the index where angle is 2 degrees
angleLimit = 2;
idxLimit = find(a >= angleLimit, 1);

% Power on Cylinder for Tilting
figure(1)
subplot(2,2,3)

% Plot red line up to angle of 2 degrees, including the point at 2 degrees
plot(a(1:idxLimit), P_max(1:idxLimit), 'r')

hold on;  % Hold on to plot on the same axes

% Plot blue line starting from angle of 2 degrees
plot(a(idxLimit:end), P_rest(idxLimit:end), 'b')

% Optionally, connect the two lines directly to represent a drop in power
% Find the last point of the red line and the first point of the blue line
lastPointRed = [a(idxLimit), P_max(idxLimit)];
firstPointBlue = [a(idxLimit), P_rest(idxLimit)];

% Plot a black line connecting these points
plot([lastPointRed(1), firstPointBlue(1)], [lastPointRed(2), firstPointBlue(2)], 'k--')

hold off;  % Release the hold

% Additional plot settings
title('Power on HC')
axis([0 inf, 0 inf])
xlabel('Angle')
ylabel('Power [W]')

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[Rafael]

Thank you a lot! Very helpful :)