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maverick280857

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**Mathematica for Physics -- problems**

Hi

I'm trying to work out the solved examples in the book "Mathematica for Physics" [The code is available at http://library.wolfram.com/infocenter/Books/4539/]. But I am unable to plot anything despite using the plot commands given in the book.

Specifically, looking at

**ch9.nb**(available from this link) -- problem 4 (particle propagating toward a rectangular potential), the commands given produce blank plots. I am able to plot simple functions, so I think the problem is with these commands.

I've attached my code with this thread. I'd be really grateful if someone could help me out with this.

Thanks.