how to add x^0 or y^0 variable in the function(dblquad)!!

i have question about how to automatic add x^0 in a3 for every item.Because i must need dblquad.when i use the command without add x^0 by hand .it will error!!

but actually i have a lot of things like a3 without x variable or y variable so i need help.
What command can automatic add x or y variable.

a3=((2*y)/3 - 1)^2*(5085106975559725/144115188075855872 + 3243695640608965i/18446744073709551616)
b3=matlabFunction(a3)
c3=dblquad(b3,-1,1-1,1)% it will error beacuse no x^0 so any one have good ideal about it

Answer 1

[Star Strider]

Your anonymous function ‘b3’ is a function of one variable. The MATLAB double integration functions want it to be a function of two variables. If you want to integrate it across ‘x’ as well, you would have to do something like this:

syms y x 

a3=((2*y)/3 - 1)^2*(5085106975559725/144115188075855872 + 3243695640608965i/18446744073709551616)

c3 = vpa(int(int(a3, y, -1, 1), x, -1, 1), 10)

produces:

c3 =

0.1620497113 + 0.0008075665013i

Experiment to get the result you want.

[tony kevine]

no command int ,i most need dblquad

[Star Strider]

The int function is in the Symbolic Math Toolbox.

The dblquad function will not work with your single-variable function ‘c3’.