for try-f# http://tinyurl.com/impact-fsharp (should open in another window or tab) open Impact let redLine(a, b ,m, xlen) = let mutable x = a-xlen let mutable xend = a+xlen let mutable y = b-xlen*m while (x < xend) do dot(x,y) red x <- x + 0.5 y <- y + m*0.5 dot(a,b) black clear() //let f(x) = sin(x/30.0) * 100.0 //let f(x) = 100.0/((2.0**(-(x-40.0)/4.0)) + 1.0) - 45.0 let f(x) = (-25.0) + (0.2 *x) + 100.*(2.**(-(((x-100.)/50.)**2.)) - (2.*(2.**(-(((x-100.)/25.)**2.))))) //let f(x) = 2.0*x-80.0 let fprime(x,h) = (f(x+h) - f(x)) / h x <- 0.0 while x < 100.0 do dot(x,f(x)) pink x <- x + 1.0 h <- 3.0 x <- 0.0 while (x < 100.0) do dot(x,fprime(x,h)*10.0) red m <- fprime(x,h) redLine(x,f(x),m,h*2.0) dot(x,f(x)) black x <- x + h*5.0 |
iMPaCT try f# >