# Questions tagged [functional-data-analysis]

Functional Data Analysis defines a framework where the fundamental units of analysis are functions.

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### Identify minimal set of information to gather - multi-criteria analysis background

I do not know where to ask this question thus I started here. Feel free to propose a StackExchange community you think more relevant for this question. Imagine: $y$ is an indicator calculated from ...
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### How should I understand smoothing in functional data analysis from a modelling perspective (specifically for temperature data)?

The specifics of this question are that I am looking at daily maximum and minimum temperature from the GHCND data set obtained from NOAA's API and I view the temperatures observed at days in a year as ...
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### Continuous response variable with zeros (Functional Data Analysis)

I am using functional linear model for scalar response. It is that I have i.e. data frame with five columns. Every value in these columns is pressure estimation to certain time ( let's say every 0.04 ...
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### R: Regression between Two related Dependent Variables (not paired)

I have two dependent variables that are measured during an experiment, they both change in time (independent variable). The measurements for both variables do not always coincide in time (so they are ...
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### From a statistical perspective: Fourier transform vs regression with Fourier basis

I am trying to understand whether discrete Fourier transform gives the same representation of a curve as a regression using Fourier basis. For example, ...
283 views

### Smooth hazard function at given knots in R

Is there a way to obtain a smooth estimate of the hazard function at specific x coordinates in R? My problem is related to functional data analysis where I have a number of hazard function estimates (...
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### How to select the optimal number principal components in functional principal components analysis?

I am interested in the selecting the optimal number of principal components in functional principal component analysis (FPCA). There are various techniques to do that for example AIC, BIC etc. (I am ...
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### Confusion about when to use least-squares regression analysis

I am going through an article titled On the misuse of regression in earth science. On page 65, the author say as follows about the least-squares method. It is usual to require that the independent ...
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### How to select the number of basis functions and smoothing parameter in functional data analysis?

I am confused over the selection of number of basis and smoothing parameter for particular data set in functional data analysis. I have two data sets (A) Daily temperature data set of England of 228 ...