Simultaneous PDPE simulation : Error using integralCa​lc/finalIn​putChecks

I have output like this, I couldn't solved it

Error using integralCalc/finalInputChecks

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);

Error in Group_Assignment_1221>transfun (line 137)

q = (Aw/Vgas) * integral(fun,0,L);

Error in pdepe (line 242)

[c,f,s] = feval(pde,xi(1),t(1),U,Ux,varargin{:});

Answer 1

[Aiswarya]

Hi Nabila,

Based on your error it seems that the function 'fun' in your code is an array-valued function. An array-valued function accepts a scalar input and returns a vector, matrix, or N-D array output. The way to resolve this is as mentioned in the error message, set 'ArrayValued' as true in your 'integral' function call as follows:

q = (Aw/Vgas) * integral(fun,0,L,'ArrayValued',true);

You may also refer to the following example of integral of an array-valued function:

https://www.mathworks.com/help/matlab/ref/integral.html#btw3ipp-6