Stochastic Increments

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Can anybody help me generate the increments $\Delta$$W_n$ in mathematica. I Know $W_{i+1}=w_i+Z_{i+1}\sqrt{\Delta t}$ where the $Z_i$ are independent and standard normal. But I cant make any code to generate the increments on Mathematica. There are codes availabe for it on Matlab which I dont understand. Kindly help