MATLAB Answers

Matlab integral funtion error

조회 수: 6(최근 30일)
Leon Ellis
Leon Ellis 2021년 8월 4일
답변: Pere Garau Burguera 2021년 8월 4일
Hi, I can't seem to get the integral function to work correctly.
syms x
z=1/(3-1)
z = 0.5000
f=@(x)(x.*exp((x.^2)-1))/sin(x)
f = function_handle with value:
@(x)(x.*exp((x.^2)-1))/sin(x)
fi=integral(f,1,3)
Error using integralCalc/finalInputChecks (line 526)
Output of the function must be the same size as the input. If FUN is an array-valued integrand, set the 'ArrayValued' option to true.

Error in integralCalc/iterateScalarValued (line 315)
finalInputChecks(x,fx);

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);
This is my code, however the integral function keeps giving errors and I am unable to fix the problem. Could someone please help? Thanks in advance!

채택된 답변

Rik
Rik 2021년 8월 4일
The error tells you that you need to make sure f outputs the same size as the input.
f=@(x)(x.*exp((x.^2)-1))./sin(x);
% ^
% you forgot this one
fi=integral(f,1,3)
fi = 5.9621e+03

추가 답변(2개)

Walter Roberson
Walter Roberson 2021년 8월 4일
f=@(x)(x.*exp((x.^2)-1))./sin(x)

Pere Garau Burguera
Pere Garau Burguera 2021년 8월 4일
The solution is given in the error message, you should use
fi=integral(f,1,3,'ArrayValued',true);
Cheers,
Pere

Community Treasure Hunt

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

Start Hunting!

Translated by