Some ideas on representing an equation

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andrew Lindsay
Posts: 1
Joined: Thu Jan 20, 2011 12:24 am

Some ideas on representing an equation

Postby andrew Lindsay » Thu Jan 20, 2011 5:12 am

Dear members,

I have been playing around with PyNomo and it is a powerful product. By and large I have used it to recreate some simple nomographs that I have seen in text books that are too small or too aged to be of any use.

Now I am embarking on trying to create my own nomograph but I am having trouble deciding how to go about it.

The equation that I want to represent is as follows.

ln(C/C0) = -31000000 * exp(-10161 / (T + 273.15) * exp (1.75 * pH) * d


C/C0 - Final concentration / Initial concentration
T - Temperature, in deg C
pH - Solution pH
d - Duration, in days

Basically, given, T, pH, d and C, I want to be able to determine what initial concentration I will require.

Any assistance would be greatly appreciated.

Best regards

Andrew Lindsay
Posts: 56
Joined: Mon Dec 31, 2007 3:03 pm
Location: Finland

Re: Some ideas on representing an equation

Postby Leif » Wed Jan 26, 2011 9:49 pm

Hello Andrew,

you have missed parentheses in your equation. If your equation is type

I would probably make it simple type 3 equation with logs. If the equation is not of that form, let's look it more detailed once equation is corrected.



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