# User Portlet David Keith
Discussions
In converting an Annuity to a Cashflow, I believe the initial payment is being handled incorrectly. Here is code that demonstrates that: (* Annuity with an initial payment and then 5 payments *) (* Present value *) ...
Version 2.1 on Win 3.1. Things just keep on getting better!
Thank you very much, Brett. If I understand you, and in re-reading the docs, if ParallelAxisPlot is given a list, it expects each element at the top level to be a list of n-dimensional points. Following this, I modified my data so that each element...
Maybe for Christmas?
Thank you Rohit and Ahmed for the nice instructions.
I agree. And PlotGrid is a very good example.
Bill, That is very nice. I will remember that!
It may be that the integral does not exist. If so, you can still obtain numerical results: int[Delta_, J_] := NIntegrate[ Sqrt[(2*Delta*J*(3 - Cos[Pi*x] - Cos[Pi*y] - Cos[Pi*z]) + J^2*(3 - Cos[Pi*x] - Cos[Pi*y] -...
Yes -- easy for Mathematica: (* the list of equations *) eqs = { d - g == a (d - 1) + b (d - 1)^2 + c (d - 1)^3, e - h == a (e - 1) + b (e - 1)^2 + c (e - 1)^3, f - j == a (f - 1) + b (f - 1)^2 + c (f - 1)^3 ...
You can import the Excel sheet and plot the points or a surface, or both together: data = Rest@ Import["F:\\Users\\David\\Documents\\Mathematica Files\\Wolfram \ Forum\\Lawton\\Turnaround Elevation.xlsx"][]; ...