geo 读取单细胞csv表达矩阵 单细胞 改列名 seurat

getwd()
path="G:/silicosis/geo/GSE104154_scRNA-seq_fibrotic MC_bleomycin" #空间转录组
dir.create(path)
setwd(path)
getwd()
list.files()



raw_counts=read.csv("G:/silicosis/geo/GSE104154_scRNA-seq_fibrotic MC_bleomycin/GSE104154_d0_d21_sma_tm_Expr_raw/GSE104154_d0_d21_sma_tm_Expr_raw.csv"
                      )
head(raw_counts)[1:4,1:4]
counts=raw_counts[,-1]
head(counts)[1:4,1:4]
rownames(counts)=counts$symbol

head(raw_counts)[1:4,1:4]
counts=raw_counts[,-2]
head(counts)[1:4,1:4]
rownames(counts)=counts$id
counts=counts[,-1]

library(Seurat)
#https://zhuanlan.zhihu.com/p/385206713
rawdata=CreateSeuratObject(counts = counts,project = "blem",assay = "RNA")

ids=raw_counts[,1:2]
head(ids)
colnames(ids)= c('ENSEMBL','SYMBOL')
head(ids)
dim(ids) # [1] 16428 
ids=na.omit(ids)
dim(ids) # [1] 15504 
length(unique(ids$SYMBOL)) # [1] 15494 
# 这里的关系超级乱，互相之间都不是一对一 
# 凡是混乱的ID一律删除即可
ids=ids[!duplicated(ids$SYMBOL),]
ids=ids[!duplicated(ids$ENSEMBL),]
dim(ids)
pos=match(ids$ENSEMBL,rownames(rawdata) )
hp_sce=rawdata[pos,]
hp_sce
#rownames(hp_sce) = ids$SYMBOL
# RenameGenesSeurat  -----------------------------------------------
#创建函数 改名字
RenameGenesSeurat <- function(obj , 
                              newnames ) { 
  # Replace gene names in different slots of a Seurat object. Run this before integration. Run this before integration. 
  # It only changes obj@assays$RNA@counts, @data and @scale.data.
  print("Run this before integration. It only changes obj@assays$RNA@counts, @data and @scale.data.")
  RNA <- obj@assays$RNA
  
  if (nrow(RNA) == length(newnames)) {
    if (length(RNA@counts)) RNA@counts@Dimnames[[1]]            <- newnames
    if (length(RNA@data)) RNA@data@Dimnames[[1]]                <- newnames
    if (length([e-mail])) [e-mail]@Dimnames[[1]]    <- newnames
  } else {"Unequal gene sets: nrow(RNA) != nrow(newnames)"}
  obj@assays$RNA <- RNA
  return(obj)
}

hp_sce=RenameGenesSeurat(obj = hp_sce, 
                      newnames = ids$SYMBOL)
getwd()
#save(hp_sce,file = 'first_sce.Rdata')



hp_sce
rownames(hp_sce)[grepl('^mt-',rownames(hp_sce))]
rownames(hp_sce)[grepl('^Rp[sl]',rownames(hp_sce))]

hp_sce[["percent.mt"]] <- PercentageFeatureSet(hp_sce, pattern = "^mt-")
fivenum(hp_sce[["percent.mt"]][,1])
rb.genes <- rownames(hp_sce)[grep("^Rp[sl]",rownames(hp_sce))]
C<-GetAssayData(object = hp_sce, slot = "counts")
percent.ribo <- Matrix::colSums(C[rb.genes,])/Matrix::colSums(C)*100
hp_sce <- AddMetaData(hp_sce, percent.ribo, col.name = "percent.ribo")

getwd()




plot1 <- FeatureScatter(hp_sce, feature1 = "nCount_RNA", feature2 = "percent.mt")
plot2 <- FeatureScatter(hp_sce, feature1 = "nCount_RNA", feature2 = "nFeature_RNA")
CombinePlots(plots = list(plot1, plot2))

VlnPlot(hp_sce, features = c("percent.ribo", "percent.mt"), ncol = 2)
VlnPlot(hp_sce, features = c("nFeature_RNA", "nCount_RNA"), ncol = 2)
VlnPlot(hp_sce, features = c("percent.ribo", "nCount_RNA"), ncol = 2)
hp_sce

hp_sce1 <- subset(hp_sce, subset = nFeature_RNA > 200 & nCount_RNA > 1000 & percent.mt < 20)
hp_sce1


sce=hp_sce1
sce
colnames(sce)
grep(colnames(sce),pattern = ".1")
grep(colnames(sce),pattern = ".2")
[e-mail]$stim <-c(rep("PBS", length(grep("1$", sce@assays$RNA@counts@Dimnames[[2]]))), 
                       rep("PBS", length(grep("2$", sce@assays$RNA@counts@Dimnames[[2]]))),
                       rep("PBS", length(grep("3$", sce@assays$RNA@counts@Dimnames[[2]]))),
                       rep("Bleomycin", length(grep("4$", sce@assays$RNA@counts@Dimnames[[2]]))),
                       rep("Bleomycin", length(grep("5$", sce@assays$RNA@counts@Dimnames[[2]]))),
                       rep("Bleomycin", length(grep("6$", sce@assays$RNA@counts@Dimnames[[2]])))
                        ) ## 8186,7947;

table(sce$stim)

library(dplyr)
sce[["RNA"]]@meta.features <- data.frame(row.names = rownames(sce[["RNA"]]))

All = sce%>%Seurat::NormalizeData(verbose = FALSE) %>%  
  FindVariableFeatures(selection.method = "vst", nfeatures = 2000) %>%
  ScaleData(verbose = FALSE)
All = RunPCA(All, npcs = 50, verbose = FALSE)

pdf("2_ElbowPlot.pdf")
ElbowPlot(All, ndims = 50)
dev.off()

library(cowplot)
#[e-mail]$stim <- c(rep("case", length(grep("1$", All@assays$RNA@counts@Dimnames[[2]]))), rep("ctrl", length(grep("2$", All@assays$RNA@counts@Dimnames[[2]])))) ## 8186,7947;
pdf("2_pre_harmony_harmony_plot.pdf")
options(repr.plot.height = 5, repr.plot.width = 12)
p1 <- DimPlot(object = All, reduction = "pca", pt.size = .1, group.by = "stim")
p2 <- VlnPlot(object = All, features = "PC_1", group.by = "stim", pt.size = .1)
plot_grid(p1, p2)
dev.off()
##########################run harmony

All <- All %>% RunHarmony("stim", plot_convergence = TRUE)
harmony_embeddings <- Embeddings(All, 'harmony') 


pdf("2_after_harmony_harmony_plot.pdf")
options(repr.plot.height = 5, repr.plot.width = 12)
p3 <- DimPlot(object = All, reduction = "harmony", pt.size = .1, group.by = "stim")
p4 <- VlnPlot(object = All, features = "harmony_1", group.by = "stim", pt.size = .1)
plot_grid(p3, p4)
dev.off()
#############cluster
#library(harmony)
All <- All %>% 
  RunUMAP(reduction = "harmony", dims = 1:30) %>% 
  RunTSNE(reduction = "harmony", dims = 1:30) %>% 
  FindNeighbors(reduction = "harmony", dims = 1:30)
All<-All%>% FindClusters(resolution = 3) %>% identity()


options(repr.plot.height = 4, repr.plot.width = 10)
pdf("3_after_harmony_umap_two_group.pdf")
DimPlot(All, reduction = "umap", group.by = "stim", pt.size = .1)
dev.off()

pdf("3_after_harmony_cluster_UMAP.pdf")
DimPlot(All, reduction = "umap", label = TRUE, pt.size = .1)
dev.off()

pdf("3_umap_samples_split.pdf")
DimPlot(All, reduction = "umap", pt.size = .1, split.by = "stim", label = T)
dev.off()

pdf("3_after_harmony_tsne_two_group.pdf")
DimPlot(All, reduction = "tsne", group.by = "stim", pt.size = .1)
dev.off()

pdf("3_after_harmony_cluster_tSNE.pdf")
DimPlot(All, reduction = "tsne", label = TRUE, pt.size = .1)
dev.off()

pdf("3_tSNE_samples_split.pdf")
DimPlot(All, reduction = "tsne", pt.size = .1, split.by = "stim", label = T)
dev.off()
getwd()
#save(All,file ="G:/silicosis/geo/GSE104154_scRNA-seq_fibrotic MC_bleomycin/All_for_clustering.rds" )
load("G:/silicosis/geo/GSE104154_scRNA-seq_fibrotic MC_bleomycin/All_for_clustering.rds")