如果您有一个离散的数据集，并且具有定义了z的所有x和y值，则只需获取与这些数据对应的Zdata矩阵(x ，y)对.保存此矩阵，然后可以使用 interp2使其成为连续函数:

If you have a discrete dataset for which you have all the x and y values over which z is defined, then just obtain the Zdata matrix corresponding to those (x,y) pairs. Save this matrix, and then you can make it a continuous function using interp2:

function z_interp = fun(x,y)

    z_interp = interp2(Xdata,Ydata,Zdata,x,y);

end

然后，您可以使用 integral2 查找积分:>

Then you can use integral2 to find the integral:

q = integral2(@fun,xmin,xmax,ymin,ymax)

其中@fun是您的函数句柄，它接受两个输入.

where @fun is your function handle that takes in two inputs.