Questions tagged [smoothing]
The smoothing tag has no usage guidance.
64
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Moving average over a dataset
I have this data set in .csv and I imported them to mathematica to analyze them using Import function. Now here I have only shown a part of the dataset just to give an example of how it looks in Excel....
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2
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Plot two smooth curves from a set of data with interlaced points
I have a set of data which was obtained from numerical calculation. The plot of the original data is as follows (the data is 26Kb only).
...
- 889
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1
answer
103
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How can I smooth sharp edges in ListDensityPlot
I have this data and there are some zigzag behaviors around the sharp edges
...
- 2,977
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1
answer
142
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2D kernel density estimation (SmoothKernelDistribution) with bandwidth estimation: what are the values that Mathematica chooses?
Mathematica has built in bandwidth estimation including the rules Scott, SheatherJones and ...
- 641
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3
answers
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Smoother boundaries between components of segmented image
I'd like to use boundaries between components of a segmented image to create a mesh for finite elements, as described in Mesh for Images for three materials and meshes with multiple regions from 2D ...
- 1,100
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36
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How to calculate smoothing constant alpha in ExponentialMovingAverage?
I'm trying to use ExponentialMovingAverage on a time series, but I'm not sure how I'm supposed to calculate the smoothing constant. I read that the appropriate ...
- 1
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0
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317
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Histogram (automatic binning)
There are different methods for choosing widths of bins for a histogram, like Freedman-Diaconis rule. In Mathematica, without choosing a specific method, with the command ...
user79703
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2
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98
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1
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2
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126
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How to smooth data
I have a list of the form dataTosmooth={{a,b,c},....} where a and b are coordinates and c is the data to be smoothed. In other words, smooth dataTosmooth[[All,3]] along dataTosmooth[[All,{1,2}]]. What ...
- 187
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Approximate the piecewise constant with a smooth function
Let us first define a two regions as follow :
inner=1;outer=2;
reg1 = Disk[{0, 0}, inner];
reg2 = Annulus[{0, 0}, {inner, outer}];
glass=1.5;air=1;
Now let's say I ...
5
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2
answers
763
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Smooth Boxcar function (Rectangle Pulse function)
There are some answers on how to get a smooth squarewave function. But I would like to have a smooth boxcar function or rectangle function with 2 different widths.: ...
- 1,609
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1
answer
229
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Smoothing an irregular TimeSeries and calculate it's Derivative
I've a data set consisting of two columns, the first column is a date and the second is a numeric cumulative amount. I tried to create a time series, resample it and smooth but I couldn't manage to ...
- 518
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Smoothing a function after interpolation + trying to fit 3D data into model without accurate prior knowledge
I have a physical problem simulation that generates this data set in the two cylindrical coordinates $(r,z)$ (doesn't include $\phi$ dependence). The data set (see .wdx file) is in the flattened form $...
- 238
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1
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141
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How to remove spikes from boundaries in ListContourPlot?
I have a table with three columns, that is of the form {{x1,y1,z1},{x2,y2,z2}....}.
I have done a ListContourPlot with it.
But the contour boundaries have spikes in it. What might be the reason and ...
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2
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124
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1
vote
1
answer
108
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Smoothing a dataset
I have a dataset, named data as follows:
data = Transpose[{Table[i, {i, 1, 10, 0.1}],
N[Table[Log[i] + RandomReal[0.5], {i, 1, 10, 0.1}]]}];
I need to ...
- 309
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3
answers
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Rounding an Irregular Polygon
Consider a random irregular convex polygon, for example, the 6-side polygon
I want to define a function that, given a certain parameter r (roundness), rounds each ...
- 4,138
3
votes
1
answer
154
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Code or algorithm for the built-in function SavitzkyGolayMatrix
Does anyone know the algorithm that the function SavitzkyGolayMatrix implements?
Unusually, the help page does not spell out an explicit formula or the algorithm ...
- 1,573
2
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1
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309
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Calculate and plot mean values of pairs of data points
I have a list of data points where there can be multiple y values for a given x value, e.g., {{0, 4}, {1, 2}, {1, 3}, {2, 3}}. I would like to
Take the mean of the y values for each x value. Get a ...
- 31
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1
answer
102
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Moving map with non-overlapping window
How can I apply a function to a list with non-overlapping window. E.g. $data = \{x_1, x_2, ...., x_n\}$ and we apply f with window size 2 to get $\{f(x_1,x_2), f(x_3, x_4), ...., f(x_{n-1}. x_n)\}$.
...
- 1,548
4
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0
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126
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BSpline vs natural spline [closed]
The BSpline in mathematica is defined mathematically here. These BSplines constitute basis for any Spline. But how do I define natural splines in mathematica, i.e. splines that are linear left of the ...
- 1,548
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37
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RegionPlot with FindMaximum
I don't understand why each time I'm launching this computation Mathematica buggs and I get a message from Windows that the Kernel stopped working...
I'm trying to get a map of where the value of ...
- 1,225
11
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2
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1k
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Catmull-Clark and Doo-Sabin Subdivision Implementations
I want to work on subdivision surfaces. Unfortunately, I don’t have any source code to start with. I need some Mathematica codes for applying Catmull-Clark and Doo-Sabin methods. I would like to ...
- 113
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241
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How to make the ListContourPlot3D smooth and closed?
I am struggling with making my plot in ListContourPlot3D smooth and closed. I have seen so many posts regarding the same issue but in other functions, the solution of which can not be applied to ...
- 1,159
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219
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3
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1
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422
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Changing the averaging window dynamically in a moving average
I have some temperature decay data (2k points) that is very noisy for large time values. I don't want to do much or any smoothing to the data early on, but would like a large window to average over ...
- 123
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0
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33
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Smoothing the surface created from a set of points
I have a question about "smoothing" the surface created on the basis of a set of points. I would like to get an effect similar to that from the Documentation Center.
enter link description here
The ...
- 67
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65
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Smoothen curve in ListDensityPlot [duplicate]
I have a list of points of dimensions (150,101) and I am plotting them in a ListDensityPlot. I am happy with the command and how the data is represented, but I ...
- 21
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4
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Smoothing noisy data
I have this data shown in picture 1 below and I want to filter it. I tried some filters but I couldn't get good results. seems that I didn't choose the best parameters for it.
I want to smooth my ...
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3
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384
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How to find the boundary of a region from a dataset
I have a dataset which supposed to show some regions. For example
...
- 15.5k
29
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2
answers
1k
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Smoothing 3D contours as post processing
Context
Following this question (and great answer!),
It would be nice to have a function which also smooths 3D contours plots once they have been done. There are various solutions which involve ...
- 21.7k
19
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3
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Generic contour smoothing with shading
Context
It would be nice to have a function which smooths contours plots once they have been done. There are various solutions which involve smoothing the data before making the contours, but here I ...
- 21.7k
2
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1
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Smoothing EdgeDetect - image processing
I have to make a program that analyzes the image of saw tooth and later find the function that can describe it (or just part of it). Now I have a problem with smoothing the edges detected with ...
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Smoothing 2-d Functions [closed]
I have a large array of triples
(x_i,y_i,f(x_i,y_i))
The the values x_i and y_i are equidistant variables and the function values f(x_i,y_i) are results of a Monte Carlo calculation which contain ...
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2
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Interpolating noisy data
My data looks like this:
https://pastebin.com/n59CTB3L
Or if displayed in log chart:
I want to create an interpolation of the data that would remove most of the noise.
What are some good ways to ...
- 493
36
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1
answer
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How to perform Loop subdivision on a triangle mesh with Mathematica?
(Cross posted on Wolfram Community)
Every now and then, the question pops up how a given geometric mesh (e.g. a MeshRegion) can be refined to produce a (i) finer ...
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152
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13
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3
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782
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Improve the mesh smoothing procedure
My question is inspired by this answer about meshing with quadrilateral elements.
The following functions are my (naive) try of implementing the Laplacian smoothing. I find interior nodes in the mesh ...
- 6,373
2
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0
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143
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DistributionChart and kernel smoothing: preventing negative numbers
I am visualising rather scarce data about size distribution of certain objects (here - oil basin areas on continents, to be specific). There is no raw data, but some already processed quantities, for ...
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Interpolating or smoothing list plot
I am currently trying to interpret my FTIR data. But due to a lot of background noise, my spectrum is quite spiky and fluctuating at some points. I want to try to smoothen my function to make the ...
- 213
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2
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How to get a smooth ridge from a binary image
I always have this demand,but Mathematica cannot implement this perfectly for me.For example,I have such binary image
...
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3
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3
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202
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How to make logic for detecting "abnormality point" and remove it from data points
Here are my data points:
...
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2
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1
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Smoothing the gradient of the potential function from a finite element calculation
The results from a finite element calculation using NDSolve are, in this case, a potential function expressed as an interpolation function. To get values from the potential function it is necessary to ...
- 14.5k
8
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5
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634
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How to get a smooth outline
I have a outline image
img=Uncompress[FromCharacterCode[
Flatten[ImageData[Import["http://i.stack.imgur.com/cc0Mt.png"],"Byte"]]]]
This is current method
<...
- 23.1k
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1
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376
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What exactly do DerivativeFilter and RidgeFilter do with the scale parameter?
Both DerivativeFilter and RidgeFilter take an optional parameter σ to indicate the scale of ...
- 8,564
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2
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451
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Smooth curves in a raster image
I have a *.bmp image, e.g. this one:
I need to smooth boundaries of the thick curves and save it in a vector graphics form. Is there a simple way how to do that in Mathematica 10? I know it is ...
- 491
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1
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292
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Smoothing of oscillatory function
I have a pretty gruesome expression of which I need to do the inverse Fourier transform twice (over two coordinates ($\omega$ to $t$ and $q$ to $r$)).
$f(q,\omega)= \frac{ 2 \sqrt{\pi} \sqrt{\frac{...
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How to obtain a smooth plot? [closed]
I have obtained some simulation result. But the number of realisations is small as each realisation is expensive.
I have the data.
for X-axis:
...
