help with matlab or java?

In [1] it is shown that a hopping robot returns to its next apex height, x_k+1, as a function of its previous apex height, x_k, according to the model x_k + 1 = exp(-alpha x_k ln 1/x_k) In this problem you will use your favorite programming environment to plot the iterates of this function (i.e, its successive application whereby the output of the k^th step becomes the input to the k + 1^st step). The abscissa ("x"-axis) of your plot represents the integer index and the ordinate ("y" axis) represents the numerical value of the function. (a) Plot the first 100 iterates from a variety of initial positive numbers, x_0 for alpha = 2