curve fitting for different data
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Hello,
I have a data from different factors, I need to make a fitting curve as an estimation function for them.
18 个评论
Star Strider
2019-10-9
Do you have a mathematical description of the process that created these data? Any number of functions could fit them, however estimating the parameters of the process that created them is the only one that would make any sense.
Ahmed Abdalazeez
2019-10-10
Hi,
Thank you for your response!
I normalized these data by taking the parameter-constant- (L/\lambda)^1/4, so then I get thier distribution as it shown in this figure. Now I want indepentent function can estimate y according to x.
Star Strider
2019-10-10
My pleasure.
It would be extremely helpful to know exactly what you are plotting, and the mathematical model of the process that produced those data, as well as the normalisation constants and other information.
We still do not have any of that information.
Ahmed Abdalazeez
2019-10-10
Star Strider
2019-10-10
What parameters would you want from a curve fit to your data?
Are there any literature references that you can post (preferably as .pdf files) that could explain this in more detail, for those of us who (like me) have very little understanding of littoral dynamics?
Have others estimated these parameters? If so, what models did they use?
Ahmed Abdalazeez
2019-10-10
Star Strider
2019-10-10
What parts of this equation:
fit = ((70/20).^(1/8)*(((s/s0).^(1/4))));
represent parameters you want to fit? The exponents? s0?
Ahmed Abdalazeez
2019-10-10
Star Strider
2019-10-10
As I interpret it, ‘s’ are data, so ‘s0’ would be the parameter you want to estimate. Is this correct?
Before I attempt to extract your data from the figure you posted, what are they? If you already assumed a value for ‘s0’, then there is nothing to estimate.
I am still not certain what you are doing, or what your data are.
Ahmed Abdalazeez
2019-10-10
Star Strider
2019-10-10
O.K. That much is now clear.
I still need to know what your data are. I assume in ‘num.fig’ that ‘s/s0’ is ‘x’. Is that correct? What is ‘y’? I am still not certain what the plot represents, or what the data are that are plotted.
Ahmed Abdalazeez
2019-10-10
Star Strider
2019-10-10
How am I supposed to estimate Rmax/R0, or Rmax or R0 if that calculation has already been done?
What is the value of (L/lambda)^1/4?
Ahmed Abdalazeez
2019-10-10
Star Strider
2019-10-10
I am not getting the information I need.
Ahmed Abdalazeez
2019-10-10
Ahmed Abdalazeez
2019-10-11
Ahmed Abdalazeez
2019-10-11
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2019-10-9
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2021-8-20
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