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Results for "inverse regression"
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2 votes
0 answers
41 views

Calculation of inverse regression

I am reading the paper on consistency and sparsity for sliced inverse regression in high dimensions (https://doi.org/10.1214/17-AOS1561). … What I only know is the classical sliced inverse regression conclusion that $E(x|y)$ satisfies $$ E(x|y) = \Sigma\beta(\beta^{T}\Sigma\beta)^{-1}\beta^T E(x|y). $$ Is there a similar conclusion when we …
Gareth's user avatar
  • 41
2 votes
Accepted

Should we use measured vs. modelled or modelled vs. measured?

And that is exactly what ordinary least squares regression does. … The use of 45 degree angles makes it easier to compare differences (see also this question and answer about slopegraphs) Related questions Inverse Regression vs Reverse Regression Effect of switching …
Sextus Empiricus's user avatar
3 votes

If $X$ and $Y$ are uncorrelated random variables, then under what condition is $E[X \mid Y] ...

This question was motivated by the sliced inverse regression method of Duan and Li, where you regress $X$ on $Y$ to learn about $Y|X$ …
Thomas Lumley's user avatar
1 vote

R's lm(), get x when y is known

I don't have enough reputation to comment, but I've heard it referred to as calibration or inverse regression. Hope that gives you something to start. …
PRZ's user avatar
  • 113
2 votes
Accepted

Is it possible (and even correct) to calculate a confidence interval from an interpolated va...

This is a 'calibration' or (perhaps more descriptively) an 'inverse regression' problem. That should guide you to some useful theoretical treatments. …
conjugateprior's user avatar
0 votes
0 answers
50 views

Model fit after inverse regression and forward stagewise on residuals

"B", "C", "D", "E"), height = c(2, 4, 6, 10, 12), gene1 = c(0.2, -0.3, -0.6, -0.7, -0.8), gene2 = c(0.4, -0.2, -0.4, -0.2, -0.6), gene3 = c(-0.1, 0.1, 0.3, 0.5, 0.7)) I became interested in doing inverseregression on gene 1, since the residual values I obtain from that gives different results than using height as response. …
Pardus's user avatar
  • 1
0 votes

Which is the error of a value corresponding to the maximum of a function?

This is a variant of calibration, or inverse regression/inverse prediction. One survey paper is this at JSTOR but it does not look explicitly at predicting the peak location. … Some stored google searches that looks promosing: peak detection and confidence intervals and response surface, inverse regression. …
kjetil b halvorsen's user avatar
5 votes
2 answers
4k views

Inverse Regression vs Reverse Regression

This is what I mean by inverse regression. However I've seen since been playing with some toy models and I'm starting to see that the 'wrong' method produces much better predictions. … Are there other situations where inverse regression actually outperforms? …
JackEm's user avatar
  • 61
3 votes
1 answer
277 views

Using QR Factorization to improve Sliced Inverse Regression

This code implements Slice Inverse Regression (SIR) in an unusual way. I notice that, when I compare it to the standard algorithm, the modified algorithm does better. … import numpy as np import matplotlib.pyplot as plt from sliced import SlicedInverseRegression # sliced inverse regression # X - NxM matrix of M inputs and N observations # Y - vector of responses of length …
kilojoules's user avatar
1 vote
0 answers
67 views

Regression betas of X on Y and Y on X are both less than one? [duplicate]

If I regress y on x and the beta is less that one, shouldn't the beta from a regression of x on y be greater than one. … And if that's the case should the inverse regression yield a beta greater than one? What am I missing? Is there an easy way to conceptualize this? …
Eddie11's user avatar
  • 13
0 votes
1 answer
124 views

Can we use sliced inverse regression for p> n

I've been using sliced inverse regression for my work and I use the dr package in R to estimate the parameter vector. … I really appreciate it if someone can direct me to a link or an R package that can handle the p>n case for sliced inverse regression. Or if you can explain why we can't use it when p>n. …
userK's user avatar
  • 51
0 votes
0 answers
472 views

Regression and calibration/inverse regression - the same?

I will do this by using a multiple regression. First question: Is a simple multiple regression sufficient or is there something "advanced" more suitable? … Despite from that, I wonder if a calibration is the same as an inverse regression? …
Ben's user avatar
  • 3,493
5 votes

Are negative Detection Limit for concentrations consistent

Magno, “A statistical overview on univariate calibration, inverse regression, and detection limits: application to gas chromatography/mass spectrometry technique”, Mass Spectrometry Reviews 26 (2007) 1 …
Ed V's user avatar
  • 376
3 votes
1 answer
76 views

Inverted dose-response variables

Typically this is done with inverse regression techniques (i.e. after-fitting / reparameterisation), but sometimes these impose constraints or come with a greater degree of uncertainty. …
André.B's user avatar
  • 1,535
1 vote

What is the error of my regression?

$$A=\frac{1}{1-\left(\frac{V}{\theta_0} \right)^{\theta_1}}+\theta_2 \tag 1$$ The inverse function is : $$V=\theta_0\left(1-\frac{1}{A-\theta_2} \right)^{1/\theta_1} \tag 2$$ The problem is to evaluate … ADDITION after comments Cubic Polynomial Regression works very well with log-log variables : Even quadratic polynomial regression is sufficient as shown on the next figure : But the polynomial regression
JJacquelin's user avatar

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