Last updated: 2020-10-07

Checks: 6 1

Knit directory: ebpmf_data_analysis/

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    Modified:   topicView-app/app.R

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These are the previous versions of the repository in which changes were made to the R Markdown (analysis/news_ebpmf_wbg_k20.Rmd) and HTML (docs/news_ebpmf_wbg_k20.html) files. If you’ve configured a remote Git repository (see ?wflow_git_remote), click on the hyperlinks in the table below to view the files as they were in that past version.

File Version Author Date Message
Rmd 2cee0af zihao12 2020-10-07 add a plot to ebpmf data analysis
html 881d3d6 zihao12 2020-10-05 Build site.
Rmd 8fd7d46 zihao12 2020-10-05 add more analysis on nips and news data

Introduction

I applied ebpmf_wbg (with \(k = 20\)) to news dataset. let’s see the results.

#setwd("~/Desktop/git/ebpmf_data_analysis/")
library(Matrix)
# Warning: package 'Matrix' was built under R version 3.5.2
library(dplyr)
# Warning: package 'dplyr' was built under R version 3.5.2
library(fastTopics)
library(ggplot2)
# Warning: package 'ggplot2' was built under R version 3.5.2
library(cowplot)
# Warning: package 'cowplot' was built under R version 3.5.2
library(CountClust)
# Warning: package 'CountClust' was built under R version 3.5.2
source("code/plots.R")
source("code/util.R")
source("code/misc.R")
# Warning: package 'pheatmap' was built under R version 3.5.2
set.seed(123)

version = "v0.4.5"
method_name = "ebpmf_wbg"
data_name = "news"
dir_name = "News"
K = 20
maxiter = 2000

load data and fitted model

Note that: \(X_{ij} \sim Pois(\sum_k w_k l_{i0} l_{ik} f_{j0} f_{jk})\). I use \(\text{loading}_{ik} = w_k l_{ik}\) then scale it so that each row sums to 1. There are other ways to get a meaningful loading…

X = read_news_bag_of_words(sprintf("data/%s/docword.%s.txt", dir_name, data_name))
vocab = readLines(sprintf("data/%s/vocab.%s.txt", dir_name, data_name))
labels = readLines(sprintf("data/%s/topics.%s.txt", dir_name, data_name))

## data size
print(dim(X))
## percentage of nonzero elements
print(length(X@x)/(nrow(X) * ncol(X)))

## unique topics (20 of them, same as K used in the model)
print(unique(labels))
# [1] 18774 55911
# [1] 0.002314951
#  [1] "alt.atheism"              "comp.graphics"           
#  [3] "comp.os.ms-windows.misc"  "comp.sys.ibm.pc.hardware"
#  [5] "comp.sys.mac.hardware"    "comp.windows.x"          
#  [7] "misc.forsale"             "rec.autos"               
#  [9] "rec.motorcycles"          "rec.sport.baseball"      
# [11] "rec.sport.hockey"         "sci.crypt"               
# [13] "sci.electronics"          "sci.med"                 
# [15] "sci.space"                "soc.religion.christian"  
# [17] "talk.politics.guns"       "talk.politics.mideast"   
# [19] "talk.politics.misc"       "talk.religion.misc"
model = readRDS(sprintf("output/%s/%s/%s_%s_initLF50_K%d_maxiter%d.Rds", dir_name, version, data_name, method_name, K, maxiter))
L_scaled = model$qg$qls_mean %*% diag(model$w)
L_scaled = L_scaled/rowSums(L_scaled)
fit = list(L = L_scaled)

Meaning of topics:

See topicView (more info to add)

Visualization of \(L\)

Hierarchical Clustering

## use code from https://stephenslab.github.io/count-clustering/project/src/gtex_v6_structure_genes.html
rows <- c()
for(label in unique(labels)){
  rows <- c(rows, sample(which(labels == label), size = 50))
}

omega = fit$L[rows, ]
colnames(omega) <- c(1:NCOL(omega))
rownames(omega) <- c(1:NROW(omega))

#find sample orders in hierarchical clustering
docweights_per_tissue_mean <- apply(omega, 2,
                                    function(x) { tapply(x, labels[rows], mean) })
ordering <- heatmap(docweights_per_tissue_mean)$rowInd

Version Author Date
881d3d6 zihao12 2020-10-05

Structure Plot

levels_reordered <- unique(labels)[ordering]

annotation <- data.frame(
    sample_id = paste0("X", 1:length(labels[rows])),
    tissue_label = factor(labels[rows], levels = rev(levels_reordered)))

StructureGGplot(omega = omega, annotation = annotation, 
                palette = c(RColorBrewer::brewer.pal(12, "Paired"), RColorBrewer::brewer.pal(8, "Accent")),
                yaxis_label = "",
                order_sample = TRUE,
                split_line = list(split_lwd = .1,
                                  split_col = "white"),
                axis_tick = list(axis_ticks_length = .1,
                                 axis_ticks_lwd_y = .5,
                                 axis_ticks_lwd_x = .5,
                                 axis_label_size = 5,
                                 axis_label_face="bold"))

Version Author Date
881d3d6 zihao12 2020-10-05

t-SNE plots

p12 <- my_tsne_plot(fit,k = 1:K,num_threads = 8,verbose = FALSE)
print(p12)

Version Author Date
881d3d6 zihao12 2020-10-05

PCA plots

lams = svd(x = L_scaled)$d
plot(1:length(lams), lams/sum(lams), xlab = "eigen idx", ylab = "prop of variance explained")

Version Author Date
881d3d6 zihao12 2020-10-05

PCA plots (Show the density of the points by “hexbin” plots)

bins <- c(0,1,5,10,100,Inf)
p4 <- pca_hexbin_plot(fit,1:2,bins = bins) + guides(fill = "none")
p5 <- pca_hexbin_plot(fit,3:4,bins = bins) + guides(fill = "none")
p6 <- pca_hexbin_plot(fit,5:6,bins = bins) + guides(fill = "none")
plot_grid(p4,p5,p6,nrow = 1,ncol = 3)

Version Author Date
881d3d6 zihao12 2020-10-05

Show where each topic lies in PC1-PC2 space

p9 <- my_pca_plot(fit,pcs = 1:2,k = 1:K)
print(p9)

Version Author Date
881d3d6 zihao12 2020-10-05

about g

\(l_{ik} \sim \pi_{kl} Ga(1/\phi_{kl}, 1/\phi_{kl})\). Note \(Var(X) = \phi, X \sim Ga(1/\phi, 1/\phi)\), and for very big \(\phi\), the mass is almost all on 0.

get_prior_summary(model$qg$gls)

get_prior_summary(model$qg$gfs)


sessionInfo()
# R version 3.5.1 (2018-07-02)
# Platform: x86_64-apple-darwin15.6.0 (64-bit)
# Running under: macOS  10.15.7
# 
# Matrix products: default
# BLAS: /Library/Frameworks/R.framework/Versions/3.5/Resources/lib/libRblas.0.dylib
# LAPACK: /Library/Frameworks/R.framework/Versions/3.5/Resources/lib/libRlapack.dylib
# 
# locale:
# [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
# 
# attached base packages:
# [1] stats     graphics  grDevices utils     datasets  methods   base     
# 
# other attached packages:
# [1] pheatmap_1.0.12    Rtsne_0.15         CountClust_1.10.1  cowplot_0.9.4     
# [5] ggplot2_3.3.0      fastTopics_0.3-177 dplyr_0.8.1        Matrix_1.2-17     
# [9] workflowr_1.6.2   
# 
# loaded via a namespace (and not attached):
#  [1] maptpx_1.9-5       nlme_3.1-140       mcmc_0.9-5         fs_1.3.1          
#  [5] RColorBrewer_1.1-2 progress_1.2.2     httr_1.4.1         rprojroot_1.3-2   
#  [9] tools_3.5.1        backports_1.1.7    R6_2.4.1           irlba_2.3.3       
# [13] vegan_2.5-5        lazyeval_0.2.2     mgcv_1.8-28        colorspace_1.4-1  
# [17] permute_0.9-5      nnet_7.3-12        withr_2.2.0        tidyselect_0.2.5  
# [21] prettyunits_1.1.1  compiler_3.5.1     git2r_0.26.1       quantreg_5.40     
# [25] SparseM_1.77       plotly_4.9.2.1     labeling_0.3       slam_0.1-45       
# [29] scales_1.1.1       hexbin_1.28.1      SQUAREM_2017.10-1  quadprog_1.5-8    
# [33] stringr_1.4.0      digest_0.6.25      rmarkdown_2.1      MCMCpack_1.4-3    
# [37] pkgconfig_2.0.3    htmltools_0.5.0    limma_3.38.3       highr_0.8         
# [41] htmlwidgets_1.3    rlang_0.4.6        farver_2.0.3       jsonlite_1.6.1    
# [45] gtools_3.8.2       magrittr_1.5       modeltools_0.2-22  Rcpp_1.0.5        
# [49] munsell_0.5.0      ape_5.3            lifecycle_0.2.0    stringi_1.4.3     
# [53] whisker_0.3-2      yaml_2.2.0         MASS_7.3-51.4      flexmix_2.3-15    
# [57] plyr_1.8.4         grid_3.5.1         parallel_3.5.1     promises_1.1.1    
# [61] ggrepel_0.8.2      crayon_1.3.4       lattice_0.20-38    splines_3.5.1     
# [65] hms_0.4.2          knitr_1.28         pillar_1.4.4       boot_1.3-22       
# [69] reshape2_1.4.3     stats4_3.5.1       picante_1.8.2      glue_1.4.1        
# [73] evaluate_0.14      data.table_1.12.2  RcppParallel_4.4.3 vctrs_0.3.0       
# [77] httpuv_1.5.4       MatrixModels_0.4-1 gtable_0.3.0       purrr_0.3.4       
# [81] tidyr_0.8.3        assertthat_0.2.1   xfun_0.8           coda_0.19-3       
# [85] later_1.1.0.1      viridisLite_0.3.0  tibble_3.0.1       cluster_2.1.0     
# [89] ellipsis_0.3.1