How can I connect my equations for a shear/bending moment diagram?

I have a 1.2 m beam. That is the vector l. SN1, SN2, and SN3 represent the three equations for my shear force diagram. When I go to plot them, they are disconnected. That is the problem. How can I make my plot connect the end of one line segment to the beginning of the next?

l = 0:.001:1.2;

    SN1 = -150*(l(logical(S1)));
    SN2 = -150*(l(logical(S2))) + 90;
    SN3 = -150*(l(logical(S3))) + 180;

    plot((l(logical(S1))), SN1, 'r')
    hold on
    plot((l(logical(S2))), SN2, 'r')
    plot((l(logical(S3))), SN3, 'r')

[matlabuser]

plot((l(logical(S1))), SN1, 'r',(l(logical(S2))), SN2, 'r',(l(logical(S3))), SN3, 'r')

This is another way that I have plotted the functions. They are still disconnected in the same way, though. Hopefully this will help identify the problem in another way.

[darova]

Try this madness

plot(l([S1 S2 S3]~=0),[SN1 SN2 SN3])

Answer 1

[Pravin Jagtap]

Hello,

I would recommend you to take a look at this question which deals with the similar issue of plotting shear force and bending moment diagram:

https://www.mathworks.com/matlabcentral/answers/492788-connecting-two-points-with-a-curved-line

Hope, this will help you.