fplot not showing any value
Hello, I’m fairly new to Matlab, and I need to plot a function. This function is the double anti-derivative of another function.
Using fplot to plot the first function works, but it doesn’t show any value for the second function… Here is my code :
syms x D(x) Dint(x) g(x) f(x)
E=2.1*10^11
L=12
F=2000
K=1500
C=0.28
e=0.008
a=0.00076
P=3000
w=77008.5
% Fonctions
D(x)=0.2191-a*x
Dint(x)=D(x)-2*e
f(x)= (-F*(L-x)-K*C*(D(x))*(L-x)^2/2)/(E*3.14*(D(x)^4-Dint(x)^4)/64)
g(x)=int(f(x)) – subs(int(f(x)),x,0)
Y(x)=int(g(x)) – subs(int(g(x)),x,0)
subs(Y,x,0)
double(subs(Y,x,12))
% Debug
fplot(f,[0 12])
fplot(Y,[0 12])
I am using Matlab R2024a.
Thanks in advance !Hello, I’m fairly new to Matlab, and I need to plot a function. This function is the double anti-derivative of another function.
Using fplot to plot the first function works, but it doesn’t show any value for the second function… Here is my code :
syms x D(x) Dint(x) g(x) f(x)
E=2.1*10^11
L=12
F=2000
K=1500
C=0.28
e=0.008
a=0.00076
P=3000
w=77008.5
% Fonctions
D(x)=0.2191-a*x
Dint(x)=D(x)-2*e
f(x)= (-F*(L-x)-K*C*(D(x))*(L-x)^2/2)/(E*3.14*(D(x)^4-Dint(x)^4)/64)
g(x)=int(f(x)) – subs(int(f(x)),x,0)
Y(x)=int(g(x)) – subs(int(g(x)),x,0)
subs(Y,x,0)
double(subs(Y,x,12))
% Debug
fplot(f,[0 12])
fplot(Y,[0 12])
I am using Matlab R2024a.
Thanks in advance ! Hello, I’m fairly new to Matlab, and I need to plot a function. This function is the double anti-derivative of another function.
Using fplot to plot the first function works, but it doesn’t show any value for the second function… Here is my code :
syms x D(x) Dint(x) g(x) f(x)
E=2.1*10^11
L=12
F=2000
K=1500
C=0.28
e=0.008
a=0.00076
P=3000
w=77008.5
% Fonctions
D(x)=0.2191-a*x
Dint(x)=D(x)-2*e
f(x)= (-F*(L-x)-K*C*(D(x))*(L-x)^2/2)/(E*3.14*(D(x)^4-Dint(x)^4)/64)
g(x)=int(f(x)) – subs(int(f(x)),x,0)
Y(x)=int(g(x)) – subs(int(g(x)),x,0)
subs(Y,x,0)
double(subs(Y,x,12))
% Debug
fplot(f,[0 12])
fplot(Y,[0 12])
I am using Matlab R2024a.
Thanks in advance ! fplot, syms MATLAB Answers — New Questions
