# Questions tagged [interpolation]

Given a set of bivariate data (x, y), to impute a value of y corresponding to some value of x at which there is no measurement of y is called interpolation, if the value of x is within the range of the measured values of x.

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### Link between RKHS reconstruction and SVM

Simply put, my question is the following : I know Reproducing Kernel Hilbert Space Reconstruction (RKHS)-type methods like RBF reconstruction and I've used them in the past. I understand Support ...
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### Interpolation of Hessian matrix

I have a model where hessian matrices are calculated along a path. Since the calculation is done using finite differences, this is very time consuming. I have tried to calculate only every second ...
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### Is a spline interpolation considered to be a nonparametric model?

I am aware of the basic differences between nonparametric and parametric statistics. In parametric models, we assume the data follows a distribution and fit it onto it using a fixed number of ...
1answer
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### Is it possible (and even correct) to calculate a confidence interval from an interpolated value?

I am using a probit model to calculate the limit of detection of a diagnostic test. For this, in R, I used glm(): ...
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### Bilinear Interpolation Algorithm for up-sampling 2D images

In keras it is possible to use UpSampling2D layer to up-sample an image. You can use Bilinear Interpolation. Given an image ${h\times w}$ it is possible to increase its size in ${h*k\times w*l}$, ...
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### How to calculate the z-score to an interpolated 2-dimensional point?

I have many 2-dimensional data-points (x,y) and I know that there is a correlation between x and y. Now, for a certain point P, I want to calculate something like a z-score (in y), given its x-value. ...
1answer
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### Interpolating between points of known uncertainty

I have a large but finite set of objects (phylogenetic trees), each of which is assigned an integer value 0 ≤ v ≤ x. x varies from set to set, but is small (≪ 100). For a given set, I wish to ...
1answer
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### Average sales of last three years using interpolation/extrapolation

I have average sales value for the last three years of a company, e.g. year avg. sales 2017 100 2018 150 2019 200 Is it possible to somehow come up with an estimate of total average sales value ...
0answers
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### GDP and multipoint interpellation

I'm trying to interpolate multiple points between two points in time. I'm trying to convert an annual forecast to quarterly to fill in the missing data points. My data: Historical quarterly GDP ...
0answers
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### How to get the number of deaths per month in this dataset?

This dataset shows the number of deaths (of all causes) in the US in 2019. It's labeled in weeks. What is the right interpretation of this for getting the number of deaths in January? Should I add ...
0answers
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### standard deviation of two constant noised signals related through interpolation

Let us say say we have a noised constant signal and want to evaluate the standard deviation (std) of the noise. We calculate the std of the said noised signal and call it σ1. Now we process the signal,...
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### Does ordinary kriging assumes a random field with zero drift?

The question is actually the above one. I'm a beginner in spatial stats and just trying to fit many puzzle pieces together. So I just wondered if ordinary kriging, in contrast to universal kriging, ...
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### What's the difference between modpolyfit and peak.Detection functions in R baseline package in terms of interpolation?

I want to use these functions to subtract the baseline off the spectrum. The first one, the modpolyfit I guess just interpolates every nth point of the spectrum. But how about the baseline....
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### Is there a method to approximately predict a 3D curve given two plane view of the curve?

Let's say the original data contains three variables, so it is a list of (x,y,z). In the figure, the blue and red curves are the lists of (x,z1) and (y,z2), respectively. These two lists are obtained ...