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Questions tagged [curve-fitting]

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0
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1answer
40 views

Curve fitted parameter appears as 0 in legend (pgfplots, gnuplot, pgfplotstable)

I fitted a curve on a dataset, but parameter c remains always 0 in the legend of the plot's fitting equation. Can you please help me why? I also checked the generated parameter.dat file and it ...
3
votes
1answer
328 views

Scatterplot with trendline with curve fitting equation of polynomial of degree 3

I'm trying to plot a scatter plot with curve fitting trendline of polynomial degrre 3. I have been able to create the required graph with trendline in excel. I tried to plot the same graph with the ...
-3
votes
1answer
183 views

Draw the curve by tikz

I want to draw a curve using controls (in picture). Please, everybody help me!
0
votes
1answer
94 views

Plotting normal curve with extremely small variance

I need a graph of a normal bell curve centered around t with a variance as small as possible (without being straight line). I've found a bunch of methods to plot a normal graph, but none where the ...
2
votes
1answer
59 views

How do I use a drawn arc as border?

The question is writen in the title, i got the grey filled part and it has to fit on the arc. I did it manualy but supose there is a better solution i can't figure out. Thank you in advance, Leo. \...
0
votes
1answer
64 views

tikzpicture curve partly displayed

I would like to plot in the same graph a theoretical plot and some experimental measurements. The pgfplot displays only a part of it (see image). Here is what I compile: \begin{tikzpicture} \begin{...
2
votes
1answer
212 views

How can I plot a smooth line of fit through the following points and is there an easier way to plot (x,y) labels for each point?

\documentclass{standalone} \usepackage{pdfpages} \usepackage{tikz} \usepackage{pgfplots, pgfplotstable} \pgfplotsset{compat=1.12} \usepgfplotslibrary{fillbetween} \usepackage{amsmath} \...
2
votes
1answer
77 views

Empty areas in figure and optimal curve fitting

I need to create a logo (well, a part of it) as an outline. The relevant part in MetaPost looks: beginfig(1) path ellipse; ellipse = fullcircle xscaled 5in yscaled 1in; for k = 0 step 45 until ...
5
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1answer
1k views

pgfplots/gnuplot: How to find the curve-fitting function passing through certain points and plot it?

Considering this code, I would like to know how to find the curve-fitting function passing through the first four points (i.e. X=[0,3]) and plot this function (e.g. the red dashed line in the desired ...
1
vote
2answers
257 views

Draw curley bracket in Latex

How to draw a curly brack around the nodes. Like I have given in the image. \begin{center} \begin{tikzpicture}[shorten <=1cm,shorten >=1cm,-latex, align=center, node distance=1cm and 10cm,on ...
7
votes
2answers
803 views

Tikz: Shifting a curve to get a tangent condition

I want to achieve a very similar thing like in this post Line tangent to a a curve (using plot or controls), starting at a point. But I need a more simple solution. I can create a first tangent curve ...
1
vote
1answer
271 views

tikz curves with labeled nodes as start and end points

These days I'm typesetting a lot of trees (in the graph-theoretic sense) using pst-jtree, which is essentially a collection of macros over pstricks. So, I might have the following. \jtree \! = {A}!...
3
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1answer
125 views

plot and fit from pgfplottable

I would like to plot a graph from data created inside pgfplottable. I have one file of data data.dat: x,y 1,2 2,3 3,4 4,5 5,8 6,9 7,34 And this code : \documentclass{beamer} \usepackage{etex} \...
6
votes
2answers
3k views

Interpolation and curve fitting - Tikzpicture? Gnuplot? Pgfplot?

well, I am fairly new to LaTeX, but I tried my hardest do find a solution for my problem but I couldn't find a proper answer, so I hope someone here has the answer or another suggestion for me. I ...
8
votes
5answers
642 views

drawing two curved arrows with ellipse between them

how can I draw two curved arrows with two ellipses between them like attached image?
1
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0answers
229 views

Drawing knots with 8 crossings and labels [closed]

So for a project, I have to draw the knot diagrams of all alternating knots with up to 8 crossings and label the regions bounded by the knots. For knots with up to 7 crossings, I used PSTricks, pst-...
5
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3answers
1k views

Curves with Latex

How I can draw curves as : Any help would be appreciated.
0
votes
1answer
2k views

Edgeworth Box of Pareto efficiency

I would like to have a figure like the following image, but I can't find a way to make the red convex curves. My code so far contains: \begin{tikzpicture} \draw (1, 3.5) to[out=0,in=90] (3.5, 1); \...
6
votes
1answer
3k views

Draw curved arrows between nodes in tikz-qtree

Is there a "clever" way to draw curved lines between nodes without them to go all through the picture? Here is my MWE : \documentclass[11pt]{beamer} \usepackage{ulem} \usepackage{tikz-qtree} \...
3
votes
0answers
163 views

How to define a pgf curve with points instead of controls? [duplicate]

The syntax to produce a Bézier curve in pgf is \pgfpathcurveto{first control point}{second control point}{target} This defines the curvature by control points. Considering the degrees of freedom the ...
8
votes
2answers
5k views

Fitting a curve from a table! (Tikz/Pgfplots)

I ploted the data from the table below (first vs. fourth column), 3000 1.2970e+00 0.198956 0.258046 3100 8.6050e-01 0.18747 0.161318 3200 5.7970e-01 0....
1
vote
1answer
356 views

Legend entry with curve fits

I am plotting two data sets with curve fits added manually (by defining two functions). How can I edit my legend entry to combine the data points and lines into one icon? So instead of having four ...
17
votes
3answers
8k views

Smooth curve through points with pgfplots

I know that one can get smooth point connections with option smooth to \addplot that takes the previous and the next point into account, but this still connects all the points. How can I draw a ...
39
votes
1answer
2k views

Hobby path realization in convex hull approach

Motivation In the answer Highlight a group of nodes in a tikz tree, Jake suggested combining the convex hull approach from padded boundary of convex hull with the hobby path and I was really ...
76
votes
6answers
5k views

Curve through a sequence of points with Metapost and TikZ

This question led to a new package: hobby I found Metapost best for drawing complex smooth curves (i.e., Bezier, splines), since you do not have to directly specify Bezier control points. ...
12
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1answer
5k views

What “smooth” plot interpolation algorithm does pgfplots use?

In the pgfplots manual it says: \addplot+[smooth] Smooth plots interpolate smoothly between successive points. In order to choose the right sampling of points from a function evaluation for plotting,...