Complexheatmap with multiple files plotting - r

Question

I would like to use Complexheatmap for multiple files for plotting individual data frame or files .
So far I was able to do this as for small subset of files.
Reading files as list
list_of_files <- list.files('Model_hmap/',pattern = '\\.txt$', full.names = TRUE)
#Further arguments to read.csv can be passed in ...
#all_csv <- lapply(list_of_files,read_delim,delim = "\t", escape_double = FALSE,trim_ws = TRUE)
all_csv <- lapply(list_of_files,read.table,strip.white = FALSE,check.names = FALSE,header=TRUE,row.names=1)
#my_names = c("gene","baseMean","log2FoldChange","lfcSE","stat","pvalue","padj","UP_DOWN")
my_names = c("Symbol","baseMean","log2FoldChange","lfcSE","stat","pvalue","padj","UP_DOWN")
#my_names = c['X2']
#my_names = c("Peak","annotation","ENSEMBL","log2FoldChange","padj","UP_DOWN")
result_abd = lapply(all_csv, FUN = function(x) subset(x, select=-c(1:7,155)))
names(result_abd) <- gsub(".txt","",
list.files("Model_hmap/",full.names = FALSE),
fixed = TRUE)
Then Scaling the data
fun <- function(result_abd) {
p <- t(scale(t(result_abd[,1:ncol(result_abd)])))
}
p2 <- mapply(fun, result_abd, SIMPLIFY = FALSE)
Next step was to use the metadata which i would like to annotate my heat-map
My metadata is as such
dput(head(metadata))
structure(list(patient = c("TCGA-AB-2856", "TCGA-AB-2849", "TCGA-AB-2971",
"TCGA-AB-2930", "TCGA-AB-2891", "TCGA-AB-2872"), prior_malignancy = c("no",
"no", "no", "no", "no", "no"), FAB = c("M4", "M0", "M4", "M2",
"M1", "M3"), Risk_Cyto = c("Intermediate", "Poor", "Intermediate",
"Intermediate", "Poor", "Good")), row.names = c(NA, -6L), class = c("tbl_df",
"tbl", "data.frame"))
To read the above metadata I'm doing this below Im not sure if its the right way or approach.
list_of_files1 <- list.files('Model_hmap_meta/',pattern = '\\.txt$', full.names = TRUE)
#Further arguments to read.csv can be passed in ...
meta1 <- lapply(list_of_files1,read.table, row.names = 1,sep = "\t",header = TRUE)
Now I'm stuck at the above step Im not sure how do I pass the argument as list which i have done for the dataframe of my gene expression which I had calculated the zscore which is a list. So I think the metadata should be the same class if I have to use this .
For single file This is how I used to annotation into my final plot
metadata = read_delim("Model_hmap_meta/FAB_table.txt",delim = "\t", escape_double = FALSE,
trim_ws = TRUE)
head(metadata)
dim(metadata)
ann <- data.frame(metadata$FAB, metadata$Risk_Cyto)
colnames(ann) <- c('FAB', 'Risk_Cyto')
colours <- list('FAB' = c('M0' = 'red2', 'M1' = 'royalblue', 'M2'='gold','M3'='forestgreen','M4'='chocolate','M5'='Purple'),
'Risk_Cyto' = c('Good' = 'limegreen', 'Intermediate' = 'navy' , 'N.D.' ='magenta','Poor'='black'))
colAnn <- HeatmapAnnotation(df = ann,
which = 'col',
col = colours,
annotation_width = unit(c(1, 4), 'cm'),
gap = unit(1, 'mm'))
Now this is what I need to pass it to the list if I understand which I'm not able to do
My plotting function.
This is the code I use to plot.
hm1 <- Heatmap(heat,
col= colorRamp2(c(-2.6,-1,0,1,2.6),c("blue","skyblue","white","lightcoral","red")),
#heatmap_legend_param=list(at=c(-2.6,-1,0,1,2.6),color_bar="continuous",
# legend_direction="vertical", legend_width=unit(5,"cm"),
# title_position="topcenter", title_gp=gpar(fontsize=10, fontface="bold")),
name = "Z-score",
#Row annotation configurations
cluster_rows=T,
show_row_dend=FALSE,
row_title_side="right",
row_title_gp=gpar(fontsize=8),
show_row_names=FALSE,
row_names_side="left",
#Column annotation configuratiions
cluster_columns=T,
show_column_dend=T,
column_title="DE genes",
column_title_side="top",
column_title_gp=gpar(fontsize=15, fontface="bold"),
show_column_names = FALSE,
column_names_gp = gpar(fontsize = 12, fontface="bold"),
#Dendrogram configurations: columns
clustering_distance_columns="euclidean",
clustering_method_columns="complete",
column_dend_height=unit(10,"mm"),
#Dendrogram configurations: rows
clustering_distance_rows="euclidean",
clustering_method_rows="complete",
row_dend_width=unit(4,"cm"),
row_dend_side = "left",
row_dend_reorder = TRUE,
#Splits
border=T,
row_km = 1,
column_km = 1,
#plot params
#width = unit(5, "inch"),
#height = unit(4, "inch"),
#height = unit(0.4, "cm")*nrow(mat),
#Annotations
top_annotation = colAnn)
# plot heatmap
draw(hm1, annotation_legend_side = "right", heatmap_legend_side="right")
Objective
How do I wrap all the above into a small function where I can take input multiple files and plot them.
UPDATE
Data files
My data files my metadafile

Answer 1

Using the code you provided I made the following function (make_heatmap). Some of the read in statements are altered to match what I was working with on my machine. I also only used 2 of your files but it should work with all 4 that you're using.
This function will allow you to pass the counts matrix (which you normalize and set up before passing to the function). The assumption is that you're using the same metadata/annotation for each file you're passing. If you have different annotation files you could set up the heatmap annotation before the function and then pass that to the function. This is a bit more tedious though.
Usually the way that I set up my heatmap analyzes is that I have a script containing all of my functions (one for each type of heatmap I have to make) and then every time I need to make a new heatmap I have another script where I read in/prepare (ie median center) my counts matrix and then call the heatmap function I need.
list_of_files <- dir(pattern = 'MAP', full.names = TRUE)
#Further arguments to read.csv can be passed in ...
#all_csv <- lapply(list_of_files,read_delim,delim = "\t", escape_double = FALSE,trim_ws = TRUE)
all_csv <- lapply(list_of_files,read.table,strip.white = FALSE,check.names = FALSE,header=TRUE,row.names=1)
#my_names = c("gene","baseMean","log2FoldChange","lfcSE","stat","pvalue","padj","UP_DOWN")
my_names = c("Symbol","baseMean","log2FoldChange","lfcSE","stat","pvalue","padj","UP_DOWN")
#my_names = c['X2']
#my_names = c("Peak","annotation","ENSEMBL","log2FoldChange","padj","UP_DOWN")
result_abd = lapply(all_csv, FUN = function(x) subset(x, select=-c(1:7,155)))
names(result_abd) <- gsub(".txt","",
list.files("Model_hmap/",full.names = FALSE),
fixed = TRUE)
fun <- function(result_abd) {
p <- t(scale(t(result_abd[,1:ncol(result_abd)])))
}
p2 <- mapply(fun, result_abd, SIMPLIFY = FALSE)
# list_of_files1 <- list.files('Model_hmap_meta/',pattern = '\\.txt$', full.names = TRUE)
# #Further arguments to read.csv can be passed in ...
# meta1 <- lapply(list_of_files1,read.table, row.names = 1,sep = "\t",header = TRUE)
make_heatmap<-function(counts_matrix){
metadata = read.table("FAB_table.txt",sep = "\t", header=1)
head(metadata)
dim(metadata)
ann <- data.frame(metadata$FAB, metadata$Risk_Cyto)
colnames(ann) <- c('FAB', 'Risk_Cyto')
colours <- list('FAB' = c('M0' = 'red2', 'M1' = 'royalblue', 'M2'='gold','M3'='forestgreen','M4'='chocolate','M5'='Purple'),
'Risk_Cyto' = c('Good' = 'limegreen', 'Intermediate' = 'navy' , 'N.D.' ='magenta','Poor'='black'))
colAnn <- HeatmapAnnotation(df = ann,
which = 'col',
col = colours,
annotation_width = unit(c(1, 4), 'cm'),
gap = unit(1, 'mm'))
hm1 <- Heatmap(counts_matrix,
col= colorRamp2(c(-2.6,-1,0,1,2.6),c("blue","skyblue","white","lightcoral","red")),
#heatmap_legend_param=list(at=c(-2.6,-1,0,1,2.6),color_bar="continuous",
# legend_direction="vertical", legend_width=unit(5,"cm"),
# title_position="topcenter", title_gp=gpar(fontsize=10, fontface="bold")),
name = "Z-score",
#Row annotation configurations
cluster_rows=T,
show_row_dend=FALSE,
row_title_side="right",
row_title_gp=gpar(fontsize=8),
show_row_names=FALSE,
row_names_side="left",
#Column annotation configuratiions
cluster_columns=T,
show_column_dend=T,
column_title="DE genes",
column_title_side="top",
column_title_gp=gpar(fontsize=15, fontface="bold"),
show_column_names = FALSE,
column_names_gp = gpar(fontsize = 12, fontface="bold"),
#Dendrogram configurations: columns
clustering_distance_columns="euclidean",
clustering_method_columns="complete",
column_dend_height=unit(10,"mm"),
#Dendrogram configurations: rows
clustering_distance_rows="euclidean",
clustering_method_rows="complete",
row_dend_width=unit(4,"cm"),
row_dend_side = "left",
row_dend_reorder = TRUE,
#Splits
border=T,
row_km = 1,
column_km = 1,
#plot params
#width = unit(5, "inch"),
#height = unit(4, "inch"),
#height = unit(0.4, "cm")*nrow(mat),
#Annotations
top_annotation = colAnn)
# plot heatmap
draw(hm1, annotation_legend_side = "right", heatmap_legend_side="right")
}
make_heatmap(as.matrix(p2[[1]])) #just call the function with the counts matrix
make_heatmap(as.matrix(p2[[2]]))
If you need to output the heatmap to a pdf or something, you can do that before calling the function or you can put that command inside of the heatmap function (just make sure to call dev.off() inside the function too in that case).