MATLAB: Help with integral2 calculator

integralintegral2integrationnumerical integration

I'm trying to create a basic double integral calculator. How do I refine the code I have so far?
      fun = @(x,y) input('enter integrand = ') 
      xmin = @(y) input('enter lower x boundary = ')
      xmax = @(y) input('enter upper x boundary = ')
      ymin = @(x) input('enter lower y boundary = ')
      ymax = @(x) input('enter upper y boundary = ')
      Q = integral2(fun,xmin,xmax,ymin,ymax)

Best Answer

Use the str2func (link) function. I would also use vectorize (link):

fun = input('enter integrand = ', 's') 

fun = str2func(['@(x,y) ' vectorize(fun)])

Q = integral2(fun, xmin, xmax, ymin, ymax)
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