Hi Jeff,
www.curvefit.com goes into a bit of detail if you're interested in the math
- or maybe try a google search on linear regression and non-linear
regression.
Otherwise, I have a bit of mathematical ability and if you provide me with
your data I could construct an equation for a curve. You might need a
pocket calculator to evaluate the equation though.
If you're interested in the math start by learning linear regression - it's
fairly simple. You should use non-linear regression for your reciprocity
failure data though (since reciprocity failure is, of course, a non-linear
behaviour). Feel free to ask more questions. If you can't tell - I like
math.
Eric
From: Jeff Dilcher <[email protected]>
*** Warning ***
*** Technical Question Follows **
** press delete key if technical questions bother you **
I have a technical question, that, perhaps someone on
the list can help me with. Please respond
directly if you like.
I am trying to develop a mathematical function which will
help determine reciprocity compensations.
Initially, I would like to be able to submit a small set of
reference values (metered exposure times along with
exposure time compensation for reciprocity). Using these,
I would like be able to enter in any exposure value, and
get a corresponding compensated value on the reciprocity
"curve".
I am trying to boil this down into an algebraic equation
as easily as is possible. I have quickly reached the
endpoint of my math abilities. Can anyone provide a clue
for me?
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