Re: math problem ???
- To: mathgroup at smc.vnet.net
- Subject: [mg9890] Re: [mg9838] math problem ???
- From: seanross at worldnet.att.net
- Date: Sun, 30 Nov 1997 00:39:39 -0500
- References: <199711281035.FAA10871@smc.vnet.net.>
- Sender: owner-wri-mathgroup at wolfram.com
T. Mammela wrote: > > i have coordinates where x-axis is in normal log anf y-axis is in log > probability scale. > > Q1: What kind of function log probability is? A guess: When you plot a function on a log axis, what units do you put with it? Log[one meter] is Log[one] Log[meter] ,but Log[meter] is not defined, but it certainly would be useful to put as the units on an axis to let me know that the function was on a Log scale and that the original units were meters. My guess is that your y value is the Log of a number representing probability, perhaps in between zero and one. > > Q2: i have a linear regression in this coordinates so what is the > equation like for this kind of regression line and how i can solve a > certain x-value if i know the y-value?? Assuming that the graph on your Log-Log scale appears linear, then Log[y]=m Log[x] +b. Apply algebra as appropriate to solve for the variable you want. Make certain that you test the results of a couple of points to make sure they make sense before you trust the results. > > > Timo M. > tmammela at paju.oulu.fi -- Remove the _nospam_ in the return address to respond.
- References:
- math problem ???
- From: "T. Mammela" <tmammela@mail.student.oulu.fi>
- math problem ???