Sample Problems > Usage > Misc

{ FIT+WEIGHT.PDE

This test shows the use of spatially-varying weights in the FIT function.

There are no variables or equations here, just a domain and some tabular

data which is FIT in different ways.

The weight declared in the FIT statement is effectively the square of the

spatial distance over which variations are smoothed.

}

title 'Test Variable-Weight FIT'

definitions

u = table('table.tbl')

boundaries

region 1

start(0,10)

line to (0,0) to (10,0) to (10,10) to close

plots

grid(x,y)

surface(u)

contour(u)

contour(fit(u)) as 'unweighted'

contour(fit(u,0.2)) as 'constant weight'

contour(fit(u,0.2*(x-5)^2)) as 'side-weights'

contour(fit(u,0.5*x)) as 'right-side weight'

contour(dx(u))

surface(dx(u))

contour(fit(dx(u)))

contour(fit(dx(u),0.5))

surface(fit(dx(u),0.5))

end

fit+weight