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} </style> <div class="fluid-row" id="header"> <h1 class="title toc-ignore">Circle fit to intensities</h1> <h4 class="author"><em>Joyce Hsiao</em></h4> </div> <!-- The file analysis/chunks.R contains chunks that define default settings shared across the workflowr files. --> <!-- Update knitr chunk options --> <!-- Insert the date the file was last updated --> <p><strong>Last updated:</strong> 2018-02-23</p> <!-- Insert the code version (Git commit SHA1) if Git repository exists and R package git2r is installed --> <p><strong>Code version:</strong> f434aa3</p> <hr /> <div id="overviewresults" class="section level2"> <h2>Overview/Results</h2> <p>Here we estimate a circle fit on the two-dimensional intensity distriubtion of GFP and RFP.</p> <hr /> </div> <div id="data-and-packages" class="section level2"> <h2>Data and packages</h2> <p>Packages</p> <pre class="r"><code>library(circular) library(conicfit) library(Biobase) library(dplyr) library(matrixStats) library(CorShrink) source("../code/circle.intensity.fit.R")</code></pre> <p>Load data</p> <pre class="r"><code>df <- readRDS(file="../data/eset-filtered.rds") pdata <- pData(df) fdata <- fData(df) # select endogeneous genes counts <- exprs(df)[grep("ENSG", rownames(df)), ] # log2cpm <- readRDS("../output/seqdata-batch-correction.Rmd/log2cpm.rds") # log2cpm.adjust <- readRDS("../output/seqdata-batch-correction.Rmd/log2cpm.adjust.rds") # import corrected intensities pdata.adj <- readRDS("../output/images-normalize-anova.Rmd/pdata.adj.rds")</code></pre> </div> <div id="circle-fitting" class="section level2"> <h2>Circle fitting</h2> <p>Based on all data.</p> <pre class="r"><code>source("../code/circle.intensity.fit.R") #sample_names <- rownames(pdata.adj) pdata.adj <- pdata.adj %>% group_by(chip_id) %>% mutate(rfp.z=scale(rfp.median.log10sum.adjust.ash), gfp.z=scale(gfp.median.log10sum.adjust.ash), dapi.z=scale(dapi.median.log10sum.adjust.ash)) pdata.adj <- data.frame(pdata.adj) par(mfrow=c(2,3)) for(i in 1:length(unique(pdata.adj$chip_id))) { id <- unique(as.character(pdata.adj$chip_id))[i] df_sub <- subset(pdata.adj, chip_id == id, select=c(gfp.z, rfp.z)) cpred <- circle.fit(df_sub) xlims <- range(df_sub[,1]) ylims <- range(df_sub[,2]) plot(df_sub, pch=16, col="gray50", xlim=xlims, ylim=ylims, cex=.7, main = id, xlab="GFP", ylab="RFP") points(cpred[,1], cpred[,2], col="blue", type = "p") points(mean(cpred[,1]), mean(cpred[,2]), col="red", pch=3, cex=2) }</code></pre> <p><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-3-1.png" width="672" style="display: block; margin: auto;" /></p> <p>Consider deleted residuals.</p> <pre class="r"><code>resids.del <- lapply(1:length(unique(pdata.adj$chip_id)), function(i) { id <- unique(as.character(pdata.adj$chip_id))[i] df_sub <- subset(pdata.adj, chip_id == id, select=c(gfp.z, rfp.z)) resids <- circle.fit.resid.delete(df_sub) scale(resids) }) names(resids.del) <- unique(pdata.adj$chip_id) par(mfrow=c(2,3)) for(i in 1:length(unique(pdata.adj$chip_id))) { # id <- unique(as.character(pdata.adj$chip_id))[i] # df_sub <- subset(pdata.adj, chip_id == id, select=c(gfp.z, rfp.z)) hist(resids.del[[i]], main = unique(pdata.adj$chip_id)[i]) }</code></pre> <p><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-4-1.png" width="672" style="display: block; margin: auto;" /></p> <p>Remove samples with standardized residuals greater than 3.</p> <pre class="r"><code>resids.del.remove <- lapply(1:length(unique(pdata.adj$chip_id)), function(i) { which(resids.del[[i]] > 3) }) names(resids.del.remove) <- unique(pdata.adj$chip_id) pdata.adj.filt <- do.call(rbind, lapply(1:length(unique(pdata.adj$chip_id)), function(i) { id <- unique(as.character(pdata.adj$chip_id))[i] df_sub <- pdata.adj[which(pdata.adj$chip_id == id),] ii.remove <- resids.del.remove[[i]] df_sub_return <- df_sub[-ii.remove,] rownames(df_sub_return) <- (rownames(pdata.adj)[which(pdata.adj$chip_id == id)])[-ii.remove] data.frame(df_sub_return) }) )</code></pre> <p>Visualize fit after removing outliers.</p> <pre class="r"><code>par(mfrow=c(2,3)) for(i in 1:length(unique(pdata.adj.filt$chip_id))) { id <- unique(as.character(pdata.adj.filt$chip_id))[i] df_sub <- subset(pdata.adj.filt, chip_id == id, select=c(gfp.z, rfp.z)) cpred <- circle.fit(df_sub) xlims <- range(df_sub[,1]) ylims <- range(df_sub[,2]) plot(df_sub, pch=16, col="gray50", xlim=xlims, ylim=ylims, cex=.7, main = id, xlab="GFP", ylab="RFP") points(cpred[,1], cpred[,2], col="blue", type = "p") points(mean(cpred[,1]), mean(cpred[,2]), col="red", pch=3, cex=2) }</code></pre> <p><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-6-1.png" width="672" style="display: block; margin: auto;" /></p> <pre class="r"><code>saveRDS(pdata.adj.filt, file = "../output/images-circle-ordering.Rmd/pdata.adj.filt.rds")</code></pre> </div> <div id="project-positions" class="section level2"> <h2>Project positions</h2> <pre class="r"><code>pdata.adj.filt <- readRDS("../output/images-circle-ordering.Rmd/pdata.adj.filt.rds") proj.res <- vector("list", length=length(unique((pdata.adj$chip_id)))) for(i in 1:length(unique((pdata.adj$chip_id)))) { proj.res[[i]] <- vector("list",2) id <- unique(as.character(pdata.adj.filt$chip_id))[i] df_sub <- subset(pdata.adj.filt, chip_id == id, select=c(gfp.z, rfp.z)) # sample_ids <- cpred <- circle.fit(df_sub) proj.res[[i]][[1]] <- data.frame(cpred, df_sub) colnames(proj.res[[i]][[1]]) <- c("pos.pred.x", "pos.pred.y", "gfp.z", "rfp.z") # convert projected coordinates to radians # modulo 2*pi proj.res[[i]][[1]]$rads <- coord2rad(cbind(proj.res[[i]][[1]]$pos.pred.x, proj.res[[i]][[1]]$pos.pred.y)) rownames(proj.res[[i]][[1]]) <- rownames(df_sub) # compute centers centers <- LMcircleFit(as.matrix(df_sub), ParIni=colMeans(as.matrix(df_sub)), IterMAX=50) proj.res[[i]][[2]] <- data.frame(x.center=centers[1], y.center=centers[2]) } names(proj.res) <- unique(pdata.adj.filt$chip_id)</code></pre> <p>Save output</p> <pre class="r"><code>saveRDS(proj.res, file = "../output/images-circle-ordering.Rmd/proj.res.rds")</code></pre> <p>Plot circle fit.</p> <pre class="r"><code>proj.res <- readRDS(file = "../output/images-circle-ordering.Rmd/proj.res.rds") par(mfrow=c(2,3)) for (i in 1:length(proj.res)) { # xlims <- range(proj.res[[i]]$gfp.z) # ylims <- range(proj.res[[i]]$rfp.z) xlims <- c(-2.5, 2.5) ylims <- c(-2.5, 2.5) plot(subset(proj.res[[i]][[1]], select=c(gfp.z, rfp.z)), pch=16, col="gray50", xlim=xlims, ylim=ylims, cex=.5, main = names(proj.res)[i], xlab = "GFP", ylab = "RFP") points(proj.res[[i]][[1]]$pos.pred.x, proj.res[[i]][[1]]$pos.pred.y, col="blue", pch=1) points(proj.res[[i]][[2]]$x.center, proj.res[[i]][[2]]$y.center, col="red", pch=3, cex=2) }</code></pre> <p><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-10-1.png" width="864" style="display: block; margin: auto;" /></p> <pre class="r"><code>par(mfrow=c(2,3)) for (i in 1:length(proj.res)) { plot(proj.res[[i]][[1]]$rads, stack=TRUE, bins=90, main = names(proj.res)[i]) }</code></pre> <p><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-10-2.png" width="864" style="display: block; margin: auto;" /></p> <hr /> </div> <div id="property-of-the-circle-fit" class="section level2"> <h2>Property of the circle fit</h2> <div id="intensity-values-by-circle-fit" class="section level3"> <h3>Intensity values by circle fit</h3> <pre class="r"><code>pdata.adj.filtered <- readRDS("../output/images-circle-ordering.Rmd/pdata.adj.filt.rds") proj.res <- readRDS("../output/images-circle-ordering.Rmd/proj.res.rds") for (i in 1:length(unique(pdata.adj.filt$chip_id))) { par(mfrow=c(2,2), mar = c(3,2,2,1)) ids <- unique(as.character(pdata.adj.filt$chip_id)) p_sub <- subset(pdata.adj.filt, chip_id == ids[i]) #all.equal(rownames(p_sub), rownames(proj.res$NA18870[[1]])) plot(proj.res[[i]][[1]]$rads, stack=T, bins=180, main = "Distribution") library(RColorBrewer) color <- colorRampPalette(brewer.pal(11,"Spectral"))(11) plot(x=as.numeric(proj.res[[i]][[1]]$rads), y=p_sub$rfp.z, pch=16, cex=.5, col=color[1], ylim=c(-2.5, 2.5), xlab = "Position on the circle", ylab = "RFP", main = "RFP") abline(h=0, lwd=.5) plot(x=as.numeric(proj.res[[i]][[1]]$rads), y=p_sub$gfp.z, pch=16, cex=.7, col=color[9], ylim=c(-2.5, 2.5), xlab = "Position on the circle", ylab = "GFP", main = "GFP") abline(h=0, lwd=.5) plot(x=as.numeric(proj.res[[i]][[1]]$rads), y=p_sub$dapi.z, pch=16, cex=.7, col=color[10], ylim=c(-2.5, 2.5), xlab = "Position on the circle", ylab = "DAPI", main = "DAPI") abline(h=0, lwd=.5) title(names(proj.res)[i], outer=TRUE, line =-1) }</code></pre> <p><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-11-1.png" width="576" style="display: block; margin: auto;" /><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-11-2.png" width="576" style="display: block; margin: auto;" /><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-11-3.png" width="576" style="display: block; margin: auto;" /><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-11-4.png" width="576" style="display: block; margin: auto;" /><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-11-5.png" width="576" style="display: block; margin: auto;" /><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-11-6.png" width="576" style="display: block; margin: auto;" /></p> </div> <div id="expression-variation-by-cell-time" class="section level3"> <h3>Expression variation by cell time</h3> <pre class="r"><code># load cell cycle genes genes.cycle <- readRDS("../output/seqdata-select-cellcyclegenes.Rmd/genes.cycle.detect.rds") # log2cpm log2cpm <- readRDS("../output/seqdata-batch-correction.Rmd/log2cpm.rds") log2cpm.adjust <- readRDS("../output/seqdata-batch-correction.Rmd/log2cpm.adjust.rds") counts.cycle <- counts[rownames(counts) %in% genes.cycle, ] log2cpm.cycle <- log2cpm[rownames(log2cpm) %in% genes.cycle, ] log2cpm.adjust.cycle <- log2cpm.adjust[rownames(log2cpm.adjust) %in% genes.cycle, ]</code></pre> </div> <div id="pearson-correlation" class="section level3"> <h3>Pearson correlation</h3> <pre class="r"><code>corrs <- lapply(1:length(unique(pdata.adj.filt$chip_id)), function(i) { id <- unique(pdata.adj.filt$chip_id)[i] log2cpm_sub <- log2cpm.adjust.cycle[, match(rownames(proj.res[[i]][[1]]), colnames(log2cpm.adjust.cycle))] counts_sub <- counts.cycle[, match(rownames(proj.res[[i]][[1]]), colnames(counts.cycle))] corrs <- do.call(rbind, lapply(1:nrow(counts_sub), function(g) { vec <- cbind(as.numeric(proj.res[[i]][[1]]$rads), log2cpm_sub[g,]) filt <- counts_sub[g,] > 1 nsamp <- sum(filt) if (nsamp > ncol(counts_sub)/2) { vec <- vec[filt,] corr <- cor(vec[,1], vec[,2]) nsam <- nrow(vec) data.frame(corr=corr, nsam=nsam) } else { data.frame(corr=NA, nsam=nrow(vec)) } })) rownames(corrs) <- rownames(counts_sub) return(corrs) }) names(corrs) <- unique(pdata.adj.filt$chip_id)</code></pre> <pre class="r"><code>par(mfrow=c(2,3)) for (i in 1:length(corrs)) { hist(corrs[[i]]$corr, main = names(corrs)[i]) } title(main = "Pearson correlation", outer = TRUE, line = -1)</code></pre> <p><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-14-1.png" width="672" style="display: block; margin: auto;" /></p> <p>Apply CorShrink</p> <pre class="r"><code>par(mfrow=c(2,3)) for (i in 1:length(corrs)) { corrs_sub <- corrs[[i]] corr.shrink <- CorShrinkVector(corrs_sub$corr, nsamp_vec = corrs_sub$nsam, optmethod = "mixEM", report_model = TRUE) names(corr.shrink$estimate) <- rownames(corrs_sub) plot(corr.shrink$model$result$betahat, corr.shrink$model$result$PosteriorMean, col = 1+as.numeric(corr.shrink$model$result$svalue < .01), xlab = "Correlation", ylab = "Shrunken estimate") abline(0,1) title(names(corrs)[i]) }</code></pre> <p><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-15-1.png" width="672" style="display: block; margin: auto;" /></p> </div> <div id="ciruclar-correlation" class="section level3"> <h3>Ciruclar correlation</h3> <pre class="r"><code>source("../code/corr.cl.R") corrs.cl <- lapply(1:length(unique(pdata.adj.filt$chip_id)), function(i) { id <- unique(pdata.adj.filt$chip_id)[i] log2cpm_sub <- log2cpm.adjust.cycle[, match(rownames(proj.res[[i]][[1]]), colnames(log2cpm.adjust.cycle))] counts_sub <- counts.cycle[, match(rownames(proj.res[[i]][[1]]), colnames(counts.cycle))] corrs <- do.call(rbind, lapply(1:nrow(counts_sub), function(g) { vec <- cbind(as.numeric(proj.res[[i]][[1]]$rads), log2cpm_sub[g,]) filt <- counts_sub[g,] > 1 nsamp <- sum(filt) if (nsamp > ncol(counts_sub)/2) { vec <- vec[filt,] corr <- R2xtCorrCoeff(lvar=vec[,2], cvar=vec[,1]) nsam <- nrow(vec) data.frame(corr=corr, nsam=nsam) } else { data.frame(corr=NA, nsam=nrow(vec)) } })) rownames(corrs) <- rownames(counts_sub) return(corrs) }) names(corrs.cl) <- unique(pdata.adj.filt$chip_id)</code></pre> <pre class="r"><code>par(mfrow=c(2,3)) for (i in 1:length(corrs)) { hist(corrs.cl[[i]]$corr, main = names(corrs)[i]) } title(main = "Circular-linear correlation", outer = TRUE, line = -1)</code></pre> <p><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-17-1.png" width="672" style="display: block; margin: auto;" /></p> <p>Compute significance value</p> <pre class="r"><code>corrs.cl.sig <- lapply(1:length(unique(pdata.adj.filt$chip_id)), function(i) { id <- unique(pdata.adj.filt$chip_id)[i] log2cpm_sub <- log2cpm.adjust.cycle[, match(rownames(proj.res[[i]][[1]]), colnames(log2cpm.adjust.cycle))] counts_sub <- counts.cycle[, match(rownames(proj.res[[i]][[1]]), colnames(counts.cycle))] corrs <- do.call(rbind, lapply(1:nrow(counts_sub), function(g) { vec <- cbind(as.numeric(proj.res[[i]][[1]]$rads), log2cpm_sub[g,]) filt <- counts_sub[g,] > 1 nsamp <- sum(filt) if (nsamp > ncol(counts_sub)/2) { vec <- vec[filt,] corr <- R2xtIndTestRand(lvar=vec[,2], cvar=vec[,1], NR=100) nsam <- nrow(vec) return(corr) } else { return(data.frame(corr=NA, pval=NA)) } })) rownames(corrs) <- rownames(counts_sub) return(corrs) }) names(corrs.cl.sig) <- unique(pdata.adj.filt$chip_id)</code></pre> <pre class="r"><code>par(mfrow=c(2,3)) for(i in 1:length(corrs.cl.sig)) { hist(corrs.cl.sig[[i]]$pval, main = names(corrs.cl.sig)[i]) }</code></pre> <p><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-19-1.png" width="672" style="display: block; margin: auto;" /></p> <p>Consider significant ones</p> <pre class="r"><code>for (i in 1:length(corrs.cl.sig)) { ii.sig <- corrs.cl.sig[[i]]$pval < .01 print(sum(ii.sig, na.rm=TRUE)) }</code></pre> <pre><code>[1] 12 [1] 21 [1] 23 [1] 11 [1] 4 [1] 10</code></pre> <p>Print some genes</p> <pre class="r"><code>for (i in 1:length(corrs.cl.sig)) { ii.sig <- corrs.cl.sig[[i]]$pval < .01 id <- unique(pdata.adj.filt$chip_id)[i] log2cpm_sub <- log2cpm.adjust.cycle[, match(rownames(proj.res[[i]][[1]]), colnames(log2cpm.adjust.cycle))] genes <- rownames(corrs.cl.sig[[i]]) if (i == 5) {numgene <- 3} else {numgene <- 4} par(mfrow=c(2,2)) for (g in 1:numgene) { gene <- genes[which(ii.sig)[g]] plot(x=as.numeric(proj.res[[i]][[1]]$rads), y = log2cpm_sub[rownames(log2cpm_sub) == gene,] , xlab = "Inferred cell time", ylab = "log2cpm", main = gene) } title(names(proj.res)[i], outer = TRUE, line = -1) }</code></pre> <p><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-21-1.png" width="480" style="display: block; margin: auto;" /><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-21-2.png" width="480" style="display: block; margin: auto;" /><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-21-3.png" width="480" style="display: block; margin: auto;" /><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-21-4.png" width="480" style="display: block; margin: auto;" /><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-21-5.png" width="480" style="display: block; margin: auto;" /><img src="figure/images-circle-ordering.Rmd/unnamed-chunk-21-6.png" width="480" style="display: block; margin: auto;" /></p> <hr /> </div> </div> <div id="session-information" class="section level2"> <h2>Session information</h2> <pre><code>R version 3.4.1 (2017-06-30) Platform: x86_64-redhat-linux-gnu (64-bit) Running under: Scientific Linux 7.2 (Nitrogen) Matrix products: default BLAS/LAPACK: /usr/lib64/R/lib/libRblas.so locale: [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C [3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 [5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 [7] LC_PAPER=en_US.UTF-8 LC_NAME=C [9] LC_ADDRESS=C LC_TELEPHONE=C [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C attached base packages: [1] parallel stats graphics grDevices utils datasets methods [8] base other attached packages: [1] RColorBrewer_1.1-2 bindrcpp_0.2 CorShrink_0.1.1 [4] matrixStats_0.53.1 dplyr_0.7.4 Biobase_2.38.0 [7] BiocGenerics_0.24.0 conicfit_1.0.4 geigen_2.1 [10] pracma_2.1.4 circular_0.4-93 loaded via a namespace (and not attached): [1] Rcpp_0.12.15 plyr_1.8.4 compiler_3.4.1 [4] pillar_1.1.0 git2r_0.21.0 bindr_0.1 [7] iterators_1.0.9 tools_3.4.1 boot_1.3-19 [10] digest_0.6.15 evaluate_0.10.1 tibble_1.4.2 [13] lattice_0.20-35 pkgconfig_2.0.1 rlang_0.2.0 [16] foreach_1.4.4 Matrix_1.2-10 yaml_2.1.16 [19] mvtnorm_1.0-7 stringr_1.3.0 knitr_1.20 [22] rprojroot_1.3-2 grid_3.4.1 glue_1.2.0 [25] R6_2.2.2 rmarkdown_1.8 reshape2_1.4.3 [28] ashr_2.2-4 magrittr_1.5 MASS_7.3-47 [31] codetools_0.2-15 backports_1.1.2 htmltools_0.3.6 [34] assertthat_0.2.0 stringi_1.1.6 pscl_1.5.2 [37] doParallel_1.0.11 truncnorm_1.0-7 SQUAREM_2017.10-1</code></pre> </div> <!-- Adjust MathJax settings so that all math formulae are shown using TeX fonts only; 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