Trying to solve a double integral with matricies

Hello, so I have this array presented as a matrix. I am trying to solve it using a double integral function, but MATLAB returns me multiple codes, any suggestions?

k1matrix2 = [   (((2818572279544283*x)/268435456 - 2818572279544283/536870912)*(x - 1/2))/4 + (((4831838193504485*x)/536870912 - 4831838193504485/1073741824)*(y - 1/2))/4,    (((8053063655840809*x)/268435456 - 8053063655840809/536870912)*(x - 1/2))/4 + (((2818572279544283*x)/268435456 - 2818572279544283/536870912)*(x - 1/2))/4, - (((2818572279544283*x)/268435456 - 2818572279544283/536870912)*(x + 1/2))/4 - (((4831838193504485*x)/536870912 - 4831838193504485/1073741824)*(y - 1/2))/4,  - (((8053063655840809*x)/268435456 - 8053063655840809/536870912)*(x + 1/2))/4 - (((2818572279544283*x)/268435456 - 2818572279544283/536870912)*(y - 1/2))/4,   (((2818572279544283*x)/268435456 - 2818572279544283/536870912)*(x + 1/2))/4 + (((4831838193504485*x)/536870912 - 4831838193504485/1073741824)*(y + 1/2))/4,    (((8053063655840809*x)/268435456 - 8053063655840809/536870912)*(x + 1/2))/4 + (((2818572279544283*x)/268435456 - 2818572279544283/536870912)*(y + 1/2))/4, - (((2818572279544283*x)/268435456 - 2818572279544283/536870912)*(x - 1/2))/4 - (((4831838193504485*x)/536870912 - 4831838193504485/1073741824)*(y + 1/2))/4,  - (((8053063655840809*x)/268435456 - 8053063655840809/536870912)*(x - 1/2))/4 - (((2818572279544283*x)/268435456 - 2818572279544283/536870912)*(y + 1/2))/4];
fun1= matlabFunction(k1matrix2(:,1));
fun2= matlabFunction(k1matrix2(:,2));
fun3= matlabFunction(k1matrix2(:,3));
fun4= matlabFunction(k1matrix2(:,4));
fun5= matlabFunction(k1matrix2(:,5));
fun6= matlabFunction(k1matrix2(:,6));
fun7= matlabFunction(k1matrix2(:,7));
fun8= matlabFunction(k1matrix2(:,8));
fun = {fun1,fun2,fun3,fun4,fun5,fun6,fun7,fun8};
double_int= @(func) integral2(func,-0.5,0.5,-0.5,0.5);
dblk12 = cellfun(double_int,fun)
Error using
symengine>@(x)(x.*2.999999991e7-1.4999999955e7).*(x-1.0./2.0).*(1.0./4.0)+(x.*1.04999999685e7-5.24999998425e6).*(x-1.0./2.0).*(1.0./4.0)
Too many input arguments.

Error in integral2Calc>integral2t/tensor (line 228)
        Z = FUN(X,Y);  NFE = NFE + 1;

Error in integral2Calc>integral2t (line 55)
[Qsub,esub] = tensor(thetaL,thetaR,phiB,phiT);

Error in integral2Calc (line 9)
    [q,errbnd] = integral2t(fun,xmin,xmax,ymin,ymax,optionstruct);

Error in integral2 (line 106)
    Q = integral2Calc(fun,xmin,xmax,yminfun,ymaxfun,opstruct);

Error in @(func)integral2(func,-0.5,0.5,-0.5,0.5)

Answer 1

[Walter Roberson]

fun2 does not happen to involve y. By default matlabFunction generates one input for each variable used, so for fun2 it would generate a function of only one variable; for all of the rest it is generating a function of two variables.

You should use 'vars', [x y] as an option to your matlabFunction call.