Dificulty plotting graph of function for basic bending moment graph

Have been having issues making a system that creates bending moment graphs,

The graph appears to be the correct shape, but i cannot figure out, how to only plot the graph from 0 to the beam lengh

clc
%bending moments calculator
syms X
%force 1
F1=50

F1 = 50

%total beam lengh
LT=4

LT = 4

%f1 distaance from left support (b)
L1=1

L1 = 1

%reactions right support (a)
REND= (L1*F1)/LT

REND = 12.5000

%reactions at left support (c)
RST= ((LT-L1)*F1)/LT

RST = 37.5000

%FROM A TO B
M1=RST*X

M1 = 

%FROM B TO C
M2=RST*X-F1*(X-(L1))

M2 = 

fplot(M1)
hold on
fplot(M2)
hold off

Answer 1

[Star Strider]

Use the second argument to fplot to limit the independent variable range —

%bending moments calculator
syms X
%force 1
F1=50

F1 = 50

%total beam lengh
LT=4

LT = 4

%f1 distaance from left support (b)
L1=1

L1 = 1

%reactions right support (a)
REND= (L1*F1)/LT

REND = 12.5000

%reactions at left support (c)
RST= ((LT-L1)*F1)/LT

RST = 37.5000

%FROM A TO B
M1=RST*X

M1 = 

%FROM B TO C
M2=RST*X-F1*(X-(L1))

M2 = 

figure
fplot(M1,[0 LT])
hold on
fplot(M2,[0 LT])
hold off

.

[james]

Many thanks, this helped loads

[Star Strider]

As always, my pleasure!