Best fit line for an exponential line
I am new to using GNUPLOT and am trying to find the best fit line (to
determine the slope) of a line that follows Power Law (is an
exponential line). I realize I have to use a function f(x) = a*b**x.
But, I do not know what to do next. Any help in this matter would be
Divya Rao <firstname.lastname@example.org> wrote:
> I am new to using GNUPLOT and am trying to find the best fit line (to
> determine the slope) of a line that follows Power Law (is an
> exponential line).
First, a terminology issue: an exponential curv...Best fit line?
Hi. Is there a function to calculate/plot the best fit line
given a few (approx 3) points? I don't have any toolboxes,
nor can I afford any.
Can any function in the basic matlab application do this?
"Amir " <amirschricker.DELETE@DELETE.gmail.DELETE.com> wrote in message
> Hi. Is there a function to calculate/plot the best fit line
> given a few (approx 3) points? I don't have any toolboxes,
> nor can I afford any.
> Can any function in the basic matlab application do this?
J...Best Fit Line
I have a problem that is puzzling me for very long.I got this
problem of fitting in 80 over text files and within each txt file,it
contains about 120 datas.I want to from these datas generate a best
fit line to cut through all these points.The program I am now using is
Matlab.Please help and reply asap,as I need the info urgently.
In article <a488ubsdofj7@legacy>,
email@example.com (Eid) writes:
> I have a problem that is puzzling me for very long.I got this
>problem of fitting in 80 over text files and within each t...best .lang. python
Any ideas on what to do?
Stop attempting to negotiate. Contact your state insurance
commission. Be prepared to divulge the name of your insurer. Keep
detailed records of all your contacts.
...line of best fit #2
I have two vectors and plotted them using a stem graph. I want to
find the line of best fit and display this on the graph. I know about
the function polyfit, but how do I graph its output?
Look at help polyval
> I have two vectors and plotted them using a stem graph. I want to
> find the line of best fit and display this on the graph. I know
> the function polyfit, but how do I graph its output?
...Help With Best Fit Lines
I am trying to compare an observed dataset with best-fit models for:
1) Power Law
3) Exponential Truncated Power Law
I am able to get these four datasets (observed data + 3 models).
But now I wish to see which of the models fits the dataset the best. It seems MATLAB AIC will only fit your data to built-in models, and not these 3 models I approximated myself.
Any suggestions for procedures (whether or not they use MATLAB or AIC) will be very helpful!!
PS: The datasets are not the same size (i.e. observed x=50 points, y=50 points. models x=1030 poi...Weighted Line of Best Fit
At the moment I am writing code to find the weighted line of best
fit. I can calculate the line of best fit using the code given below,
where sortWLAN corresponds to the entries in an array, which I want
onedist = sortWLAN(3,1:100);
onerssi = sortWLAN(4,1:100);
onewgt = sortWLAN(5,1:100);
coeffs = polyfit(onedist,onerssi, coefficient);
curvefit = polyval(coeffs, distance);
plot(onedist, onerssi, 'o');
Anybode have any ideas? Cheers
> At the moment I am writing code to find the weighted line of best
&...best fit line through coordinates
I have an issue I'd like some help with.
107.35 107 111.51 146
117 154.61 111.29 114
In the above matrix 'coordinates', its actually in the form [ x1 y1 x2 y2] for each of the 2 rows.
Is there any function I can obtain a best fit line using these 4 points?
Go look up the demo on the function polyfit, u can tell it to make a first order regression of those...Outputting lines of best fit
I have a set of data in an array (11000,207). I've been asked to detrend the data in each of the 207 columns individually. I've tried using the Matlab detrend but I cant get it to work in a sensible way for this data.
Instead I've been trying to ouput the equation for a line of best fit for the data in each column and then subtract that from the data.
Seems a simple task but the only way I have found to find a line of best fit is doing it manually once you have a figure up using the best fitting option in tools. Obviously I don't want to do this manually 207 times.
Does any...Line of best fit #3
I have a matrix simular to the one below:
Is there a command that will give me an equation for a line of best fit for these data points?
On Sep 27, 4:16=A0pm, "Charles " <charles.vaug...@colorado.edu> wrote:
> I have a matrix simular to the one below:
> =A0 =A0 =A01 =A0 =A0 2
> =A0 =A0 =A02 =A0 =A0 3
> =A0 =A0 =A03 =A0 =A0 4
> =A0 =A0 =A04 =A0 =A0 5
> =A0 =A0 =A05 =A0 =A0 6
> =A0 =A0 =A06 =A0 =A0 7
> =A0 =A0 =A07 =A0 =A0 8
> Is there a comm...Best fit line in subplot
I want to add a linear trendline in both the plots of subplot. How do
i do this, when i do this using the basic fitting option from the
tools menu of figure, the line appears only for one data set ata
time, i want to do it for both the data sets.
You're right, it doesn't seem possible to do it with the Basic
Fitting tool. I guess you have to do it by hand, like this:
%linear fit 1
p = polyfit(x,y,1)
y_lin = polyval(p,x);
%linear fit 2
p = polyfit(x,z,1)
z_lin = polyval(p,x);
h(2)=...best fit line of an ROI
The following code reads an image, allows user to select an ROI and then the intention is to select 1000 points randomly in the ROI and generate a best fit line through these points. By inserting breakpoints i see that the points generated randomly lie in the range of points belonging to the ROI. So, it seems there is no problem at this stage.I am not able to identify where else there is an error. Pls help. Thanx in advance.
%WHEN USING THE IMAGE MAKE SURE THAT BW AND BW1 DO NOY HAVE TOO MANY ELEMENTS, IF THEY DO CROP BW AND BWI AND USE THE CROPPED...nonlinear best-fit line
I am having trouble trying to figure out how to fit a nonlinear best fit
line to my data in SAS. Any help would be greatly appreciated.