Clear Filters
Clear Filters

Getting error in this code.

1 view (last 30 days)
AVINASH SAHU
AVINASH SAHU on 2 Jun 2022
Commented: Jan on 3 Jun 2022
betasqr=0.2;
gamma=0.3;
psi = 0.001;
mu = 1.0;
sbar = 50;
A = @(x) (4+sbar)-(sbar*betasqr*gamma).*(x.*(1-x)).^0.5;
B = @(x) (1-(betasqr)*((x.*(1-x)).^(0.5)));
E = @(x) ((6*(2+sbar))-((2*betasqr*sbar*gamma)*((x.*(1-x)).^(0.5))));
G = @(x) (12*psi*(1+sbar)) + A/B;
C = @(x) E/G;
IntEbyG = integral(C,0,1)
  1 Comment
Jan
Jan on 2 Jun 2022
Edited: Jan on 2 Jun 2022
A simpler version - note that sqrt(x) is much cheaper than x^0.5:
betasqr = 0.2;
gamma = 0.3;
psi = 0.001;
mu = 1.0;
sbar = 50;
A = @(x) 4 + sbar - sbar*betasqr*gamma .* sqrt(x .* (1-x));
B = @(x) 1 - betasqr * sqrt(x .* (1-x));
E = @(x) 12 + 6 * sbar - 2*betasqr*sbar*gamma * sqrt(x .* (1-x));
G = @(x) 12 * psi * (1 + sbar) + A/B; % ERROR
C = @(x) E/G; % ERROR
IntEbyG = integral(C,0,1)
Error using /
Arguments must be numeric, char, or logical.

Error in solution (line 9)
G = @(x) 12 * psi * (1 + sbar) + A/B;

Error in solution (line 10)
C = @(x) E(x)/G(x);

Error in integralCalc/iterateScalarValued (line 314)
fx = FUN(t);

Error in integralCalc/vadapt (line 132)
[q,errbnd] = iterateScalarValued(u,tinterval,pathlen);

Error in integralCalc (line 75)
[q,errbnd] = vadapt(@AtoBInvTransform,interval);

Error in integral (line 87)
Q = integralCalc(fun,a,b,opstruct);
I've displayed the error message. This is very useful, if you ask a question, because solving a problem is much easier than guessing, what the problem is. Whenever you mention an error in the forum, attach a copy of the complete message.

Sign in to comment.

Accepted Answer

Jan
Jan on 2 Jun 2022
A simpler version - note that sqrt(x) is much cheaper than x^0.5:
betasqr = 0.2;
gamma = 0.3;
psi = 0.001;
mu = 1.0;
sbar = 50;
A = @(x) 4 + sbar - sbar*betasqr*gamma .* sqrt(x .* (1-x));
B = @(x) 1 - betasqr * sqrt(x .* (1-x));
E = @(x) 12 + 6 * sbar - 2*betasqr*sbar*gamma * sqrt(x .* (1-x));
G = @(x) 12 * psi * (1 + sbar) + A(x) ./ B(x); % <-- bug fix
C = @(x) E(x) ./ G(x); % <-- bug fix
IntEbyG = integral(C,0,1)
IntEbyG = 5.3442
The error message tells you, that / does not work for function handles. Append the argument.
  3 Comments
Image Analyst
Image Analyst on 2 Jun 2022
If Jan solved the problem, then please click the "Accept this Answer" link to award Jan his "Reputation points." Thanks in advance. 🙂
Jan
Jan on 3 Jun 2022
I have more reputation points than I need for my daily living. I'd prefer cookies: 🍪
For other readers it is useful to mark a question as solved by accepting an answer.

Sign in to comment.

More Answers (0)

Categories

Find more on Function Creation in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!