The Gaussian process latent variable model (GPLVM) is a popular probabilistic method used for nonlinear dimension reduction, matrix factorization, and state-space modeling. Inference for GPLVMs is computationally tractable only when the data likelihood is Gaussian. Moreover, inference for GPLVMs has typically been restricted to obtaining maximum a posteriori point estimates, which can lead to overfitting, or variational approximations, which mischaracterize the posterior uncertainty. Here, we present a method to perform Markov chain Monte Carlo (MCMC) inference for generalized Bayesian nonlinear latent variable modeling. The crucial insight necessary to generalize GPLVMs to arbitrary observation models is that we approximate the kernel function in the Gaussian process mappings with random Fourier features; this allows us to compute the gradient of the posterior in closed form with respect to the latent variables. We show that we can generalize GPLVMs to non-Gaussian observations, such as Poisson, negative binomial, and multinomial distributions, using our random feature latent variable model (RFLVM). Our generalized RFLVMs perform on par with state-of-the-art latent variable models on a wide range of applications, including motion capture, images, and text data for the purpose of estimating the latent structure and imputing the missing data of these complex data sets.

提出一种新的方法，用于一般化贝叶斯非线性潜在变量建模，通过使用随机傅里叶特征来逼近高斯过程映射中的核函数，从而将 GPLVM 推广至泊松、负二项和多项分布等情况，并通过随机特征潜变量模型（RFLVM）对广泛的应用进行评估，结果表明该算法在复杂数据集的潜在结构和数据填充方面表现出着与现有先进算法相当的实用性。

基于随机傅里叶特征的贝叶斯非线性潜变量建模