spline Questions
1
I'm trying to make a model for a very simple data set using spline regression but so far I couldn't find any Python implementation that lets me choose knots position. The picture below shows where ...
Diachronic asked 1/2, 2019 at 15:2
3
I am trying to fit a cubic spline to a given set of points. My points are not ordered. I CANNOT sort or reorder the points, since I need that information.
But since the function scipy.interpolate....
Macule asked 27/6, 2013 at 16:15
1
I would like to display a plot created by geom_smooth() but it is important for me to be able to describe how the plot was created.
I can see from the documentation when n >= 1000, gam is used as...
1
When creating a spline chart, it is getting loops inside the chart and some portions are going beyond the chart panel. Please find the below code
ChartView {
title: "Spline"
anchors.fill: pare...
2
Solved
I'm trying to make a bumps chart (like parallel coordinates but with an ordinal x-axis) to show ranking over time. I can make a straight-line chart very easily:
library(ggplot2)
set.seed(47)
df...
7
Question: How do you fit a curve to points on a plane if they aren't single valued?
For the example shown, how would one fit a curve (like the black one) to the noisy blue data? It's similar to sp...
Cotenant asked 14/6, 2009 at 23:44
1
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I am on the lookout for (an ideally inbuilt) function in Matlab that calculates a B spline basis matrix the same way as in R, e.g. for a spline basis with 20 equally spaced knots of degree 3, I wou...
1
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Take a data frame that looks like this and contains data for some dates in 2005 and a measurement at each date.
df <- data.frame("date" = c('2005-04-04','2005-04-19', '2005-04-26', '2005-05-05...
Banka asked 19/7, 2018 at 13:40
4
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Suppose I want to approximate a half-cosine curve in SVG using bezier paths. The half cosine should look like this:
and runs from [x0,y0] (the left-hand control point) to [x1,y1] (the right-hand...
Medellin asked 12/3, 2015 at 23:46
1
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As I was working out how Epi generates the basis for its spline functions (via the function Ns), I was a little confused by how it handles the detrend argument.
When detrend=T I would have expecte...
2
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I would like to calculate a third-degree polynomial that is defined by its function values and derivatives at specified points.
https://en.wikipedia.org/wiki/Cubic_Hermite_spline
I know of scipy'...
Excitor asked 15/4, 2016 at 10:10
3
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I have data that are strictly increasing and would like to fit a smoothing spline that is monotonically increasing as well with the smooth.spline() function if possible, due to the ease of use of t...
2
I'm using scipy.interpolate.UnivariateSpline to smoothly interpolate a large amount of data. Works great. I get an object which acts like a function.
Now I want to save the spline points for later...
2
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I have a signal which I want to remove the basline drift using the picewise cubic spline algorithm in MATLAB.
d=load(file, '-mat');
t=1:length(a);
xq1=1:0.01:length(a);
p = pchip(t,a,xq1);...
Integrator asked 30/8, 2017 at 20:40
1
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Take for instance the following one-knot, degree two, spline:
library(splines)
library(ISLR)
fit.spline <- lm(wage~bs(age, knots=c(42), degree=2), data=Wage)
summary(fit.spline)
I see estimat...
Bury asked 24/6, 2017 at 17:40
2
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I am interested in some disturbing behaviour of the lm function and the associated predict.lm function in R. The splines base package provides the function bs to generate b-spline expansions, which...
2
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I am generating a graph of a cubic spline through a given set of data points:
import matplotlib.pyplot as plt
import numpy as np
from scipy import interpolate
x = np.array([1, 2, 4, 5]) # sort d...
2
How can I get a fast estimate for the distance between a point and a bicubic spline surface in Python? Is there an existing solution that I could leverage in SciPy, NumPy, or some other package?
I...
1
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I have the following piece of code. It generates the 3-D cubic spline of the given 3-D function given in parametric form. I pretty much adapted this to my case using the online documentation for sp...
Inefficacious asked 15/1, 2017 at 8:5
1
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Most people are probably familiar with bs from splines:
library(splines)
workingModel <- lm(mpg ~ factor(gear) + bs(wt, knots = 5) + hp, data = mtcars)
bs(mtcars$wt, knots = 4)
This uses a ...
Pisolite asked 12/1, 2017 at 21:20
1
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I want to use function gam in mgcv packages:
x <- seq(0,60, len =600)
y <- seq(0,1, len=600)
prova <- gam(y ~ s(x, bs='cr')
can I set the number of knots in s()? and then can I kno...
Mcgray asked 15/10, 2016 at 7:54
2
I have a two-part question about how to use splines in pythonOCC.
Firstly, I know that I can create a spline with
array = []
array.append(gp_Pnt2d (0,0))
array.append(gp_Pnt2d (1,2))
array.appen...
Enfleurage asked 14/10, 2013 at 8:41
5
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I'm trying to do something like the following (image extracted from wikipedia)
#!/usr/bin/env python
from scipy import interpolate
import numpy as np
import matplotlib.pyplot as plt
# sampling
...
Drabble asked 2/2, 2015 at 13:40
3
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Is there a library or function in python to compute Catmull-Rom spline from three points ?
What I need in the end are the x,y coordinates of points along the spline, provided that they are always ...
1
Solved
Here is the code I ran
fun <- function(x) {1 + 3*sin(4*pi*x-pi)}
set.seed(1)
num.samples <- 1000
x <- runif(num.samples)
y <- fun(x) + rnorm(num.samples) * 1.5
fit <- smooth.spline(...
Cher asked 21/4, 2016 at 20:20
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