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 how to choose the row that I want ?

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T O P I C    R E V I E W
nabilou Posted - 01/18/2013 : 07:29:57 AM
well my problem is the following:

I have 3 columns, A, B and C
A is X: x
B is Y: f(x)
Y is C: g(x)

knowing that f(x) depends on g(x) as follow:

f(x) = 1/Ln(g(x))
g(x) = [(f(x)/a)^(-1/2)]*b

I need to plot the two curves, but it was not easy because the two are not independent.

by cons, I thought of a solution to the problem. If I know the two initial values #8203;#8203;of f(x) and g(x), I can do it.

here's how:

A; B; C
1; b1=5; c1=3;
2; b2; c2;
3; b3; c3;
4; b4; c4;
5; b5; c5;

therefore, to calculate the value b2, I should use c1 = 3 , and to calculate the value c2 I should use b2. to calculate the value b3, I should use c2, and to calculate the value c3 I should use b3. and so on

the problem now is that I do not know how I do ...!
should I use set values ? C++ ? LabTalk ?


Thanks
1   L A T E S T    R E P L I E S    (Newest First)
greg Posted - 01/21/2013 : 10:48:38 AM
Your statement "to calculate the value b3, I should use c2" violates the function definition since b3 is a function of x3 while c2 is a function of x2.

Circular functions generally require iteration with some sort of convergence detection code.

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