Getting integrand error from triple integral code code

Code:

% Define the function to integrate

f = @(x, y, z) 1;

% Define the bounds

xmin = -2;

xmax = 2;

% Define ymin and ymax as functions of x

ymin = @(x) -sqrt((4 - x.^2)./3);

ymax = @(x) sqrt((4 - x.^2)./3);

% Define zmin and zmax as functions of x and y

zmin = @(x, y) 4 - x.^2 - 3.*y.^2;

zmax = @(x, y) x.^2 + y.^2;

% Perform the triple integral

result = integral3(@(x,y,z) f(x,y,z), xmin, xmax, ymin, ymax, zmin, zmax);

Error:

Error using integral2Calc>tensor (line 253)

Integrand output size does not match the input size.

Error in integral2Calc>integral2t (line 55)

[Qsub,esub,FIRSTFUNEVAL,NFE] = tensor(thetaL,thetaR,phiB,phiT,[],[], ...

Error in integral2Calc (line 9)

[q,errbnd] = integral2t(fun,xmin,xmax,ymin,ymax,optionstruct);

Error in integral3>innerintegral (line 128)

Q1 = integral2Calc( ...

Error in integral3>@(x)innerintegral(x,fun,yminx,ymaxx,zminxy,zmaxxy,integral2options) (line 111)

f = @(x)innerintegral(x, fun, yminx, ymaxx, ...

Error in integralCalc>iterateScalarValued (line 334)

fx = FUN(t);

Error in integralCalc>vadapt (line 148)

[q,errbnd] = iterateScalarValued(u,tinterval,pathlen, ...

Error in integralCalc (line 77)

[q,errbnd] = vadapt(vfunAB,interval, ...

Error in integral3 (line 113)

Q = integralCalc(f,xmin,xmax,integralOptions);

Error in Calc3Project3AlexDavies (line 18)

result = integral3(@(x,y,z) f(x,y,z), xmin, xmax, ymin, ymax, zmin, zmax);

Answer 1

[Torsten]

f must return a vector of ones of the same size as the inputs x, y or z (which all have the same sizes).

Thus replace

f = @(x, y, z) 1

by

f = @(x, y, z) ones(size(x));

[Alexander]

Thank you so much!