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Questions tagged [extrapolation]

extrapolation is a method of constructing new data points outside the range of a discrete set of known data points

Extrapolation is a method of constructing new data points outside the range of a discrete set of known data points.

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R time series interpolation, and extrapolation of a specific value

I have daily values for 11 different yield curves, that is time series for 11 yield maturities (1yr, 2yr, 3yr, 4yr, 5yr, 7yr, 10yr, 15yr, 20yr, 25yr, 30yr) in the same period of time. Some of the yields in some days are missing (NAs) and I'd like to…
stem
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How does Matlab Simbiology calculate pharmacokinetic (PK) non-compartmental (NCA) area under the curve (AUC)?

I can't seem to find the answer to my question in SimBiology's documentation. Does anyone know how Matlab calculates the non-compartmental AUC? Does it use the linear / log-linear trapezoidal rule? How many points does it use to extrapolate the…
Nicholas Syn
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Predicting via Lowess in R (OR reconciling Loess & Lowess)

I'm trying to interpolate/locally extrapolate some salary data to fill out a data set. Here's the data set and a plot of the available data: experience salary 1: 1 21878.67 2: 2 23401.33 3: 3 23705.00 4: …
MichaelChirico
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PHP MYSQL - cross result from database extrapolation

From a given database I need to extrapolate the results in this way: LINES contain the types of sport brands e.g. Nike, Reebook, etc. COLUMNS contain the stores e.g. store 1, store 2, store 3, etc. As a "cross" result, the table must show the…
Olivia S.
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How can I extrapolate a pattern from a collection of filenames?

I want to know if there is a well-known algorithm for extrapolating a filename pattern, given a collection of sample filenames as input. Take the following example filenames: ABC_348093423.csv i.ABC_348097340.csv …
Jim Tough
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Smith Wilson interpolation and extrapolation in SAS 9.1

I want to make an algorithm in SAS that allows me to interpolate interest rates in SAS and extrapolate from the last interest rate towards an interest rate of 4.2% using the Smith-Wilson algoritm. The presented in this note:…
Mathias
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Interpolation along stream network (QGIS, GRASS, PostGIS, R..)

I would like to inter/extrapolate values(concentration) along a stream network line. So far theoretically the best match would be rtop package in R, but somehow there is a bug and I cannot execute the example data. Do anyone has any other "ready"…
Celia
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imacros. Need to extrapolate random values from one column

I have an imacros script that takes data from a csv file. But i need to tell imacros to take data randomly from a column. i.e.: =ID:tag_editor_input CONTENT={{!COL2}} =ID:tag_editor_input CONTENT={{!COL2}} =ID:tag_editor_input…
Hugester.com
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interpolate and extrapolate missing columns in a data frame

I have a data frame containing data for every 4 or 5 years. I wish to interpolate data for years not in the data frame and extrapolation data for columns at either end of the data frame. I have been able to perform the interpolation with the code…
Mark Miller
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Negative fitted curve extrapolation

Good day, I am currently working with a set of data imported from a csv file. I have y values and x values (See image attached) that I am trying to extrapolate (to Age 100) and plot on a plane. My problem however, is that each polynomial fit…
Bottle
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How to extrapolate using cuRe package in R?

I am fitting a non-mixture cure model in R with splines, using the cuRe package. Here is my example: dat <- cuRe::colonDC non_mcm_spl_3df <- GenFlexCureModel(formula = Surv(FUyear, status) ~ 1, smooth.formula = …
krtbris
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Detemine the similarity between extrapolated curve and actual curve in Python

I have data, such that one data frame is subset of the other dataframe: ## Import Modules import pandas as pd import numpy as np import matplotlib.pyplot as plt #Create an original dataset, with 21 rows original_data = {'time': [ 1, 2, 3, 4, …
NN_Developer
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Extrapolation from data set in a non-rectangular domain?

I have this set of data which can be regularly spaced if needed. The problem is that there are different regimes and the boundaries are non-rectangular. For example, there is a change of phase that happens at the y = 1 - 1/x, meaning that the data…
Yannenou
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Create rotated geo coordinate grid in python

For a project I have the lovely joy to create an equally spaced grid, to be placed on a map later in QGIS. To this end, I created 4 reference coordinates, defining the top left corner as well as the x and y spacing. Based on this grid, my Python…
significant
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Trying to get a value out of an extrapolation

I have some data on voltage [mV] and current[mA] that shows the behavior of an Infrared LED, so in order to get more values that might work. I extrapolated the data, so I can get a graphic that shows me the original data(blue dots) and the…
Nicolas
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