4d integral

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Hi, I'm performing a 4d integral with colloc, but not sure if I'm doing
well, like this:
---

[t,~,~,q]=colloc(4);

[t1,t2,t3,t4]=ndgrid(t);

[q1,q2,q3,q4]=ndgrid(q);

int=sum(sum(sum(sum(U(t1,t2, t3, t4).*q1.*q2.*q3.*q4))));
---

 U(....) it's function I'm integrating.

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<div dir=3D"auto">Hi, I&#39;m performing a 4d integral with colloc, but not=
 sure if I&#39;m doing well, like this:<div dir=3D"auto">---<br><div dir=3D=
"auto"><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0.0pt;margin-bot=
tom:0.0pt" id=3D"docs-internal-guid-4394f9af-7fff-e772-9977-9b0446b75c2e"><=
span style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(0,0,0);=
font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alt=
ernates:normal;vertical-align:baseline">[t,~,~,q]=3Dcolloc(4);</span></p><p=
 dir=3D"ltr" style=3D"line-height:1.38;margin-top:0.0pt;margin-bottom:0.0pt=
"><span style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(0,0,=
0);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-=
alternates:normal;vertical-align:baseline">[t1,t2,t3,t4]=3Dndgrid(t);</span=
></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0.0pt;margin-botto=
m:0.0pt"><span style=3D"font-size:11pt;font-family:Arial,sans-serif;color:r=
gb(0,0,0);font-variant-numeric:normal;font-variant-east-asian:normal;font-v=
ariant-alternates:normal;vertical-align:baseline">[q1,q2,q3,q4]=3Dndgrid(q)=
;</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0.0pt;margi=
n-bottom:0.0pt"><span style=3D"font-size:11pt;font-family:Arial,sans-serif;=
color:rgb(0,0,0);font-variant-numeric:normal;font-variant-east-asian:normal=
;font-variant-alternates:normal;vertical-align:baseline">int=3Dsum(sum(sum(=
sum(U(t1,t2, t3, t4).*q1.*q2.*q3.*q4))));</span></p>---<br><p dir=3D"ltr" s=
tyle=3D"line-height:1.38;margin-top:0.0pt;margin-bottom:0.0pt"><span style=
=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(0,0,0);font-varia=
nt-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:no=
rmal;vertical-align:baseline">=C2=A0U(....) it&#39;s function I&#39;m integ=
rating.</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0.0pt=
;margin-bottom:0.0pt"><span style=3D"font-size:11pt;font-family:Arial,sans-=
serif;color:rgb(0,0,0);font-variant-numeric:normal;font-variant-east-asian:=
normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><=
/p></div></div></div>

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