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这有点一个相关的问题,以this post:定制plotly轴蜱
我有我想为其在plotly以产生热图的基因表达数据。
数据:
require(permute)
set.seed(1)
mat <- rbind(cbind(matrix(rnorm(2500,2,1),nrow=25,ncol=500),matrix(rnorm(2500,-2,1),nrow=25,ncol=500)),
cbind(matrix(rnorm(2500,-2,1),nrow=25,ncol=500),matrix(rnorm(2500,2,1),nrow=25,ncol=500)))
rownames(mat) <- paste("g",1:50,sep=".")
colnames(mat) <- paste("s",1:1000,sep=".")
hc.col <- hclust(dist(t(mat)))
dd.col <- as.dendrogram(hc.col)
col.order <- order.dendrogram(dd.col)
hc.row <- hclust(dist(mat))
dd.row <- as.dendrogram(hc.row)
row.order <- order.dendrogram(dd.row)
mat <- mat[row.order,col.order]
颜色数据由表达的间隔:
require(RColorBrewer)
mat.intervals <- cut(mat,breaks=6)
interval.mat <- matrix(mat.intervals,nrow=50,ncol=1000,dimnames=list(rownames(mat),colnames(mat)))
interval.cols <- brewer.pal(6,"Set2")
names(interval.cols) <- levels(mat.intervals)
require(reshape2)
interval.df <- reshape2::melt(interval.mat,varnames=c("gene","sample"),value.name="expr")
interval.cols2 <- rep(interval.cols, each=ncol(mat))
color.df <- data.frame(range=c(0:(2*length(interval.cols)-1)),colors=c(0:(2*length(interval.cols)-1)))
color.df <- setNames(data.frame(color.df$range,color.df$colors),NULL)
for (i in 1:(2*length(interval.cols))) {
color.df[[2]][[i]] <- interval.cols[[(i + 1)/2]]
color.df[[1]][[i]] <- i/(2*length(interval.cols))-(i %% 2)/(2*length(interval.cols))
}
剧情与plotly:
require(ggplotly)
heatmap.plotly <- plot_ly(z=c(interval.df$expr),x=interval.df$sample,y=interval.df$gene,colors=interval.cols2,type="heatmap",colorscale=color.df,
colorbar=list(title="score",tickmode='array',tickvals=c(1:6),ticktext=names(interval.cols),len=0.2,outlinecolor="white",bordercolor="white",borderwidth=5,bgcolor="white"))
现在我正在尝试自定义x轴刻度。 假设interval.df$sample[1:500]
对应于群集“A”并且interval.df$sample[501:1000]
对群集“B”。我希望在250和750(每个群集的x轴范围的中间)有2个x轴刻度,并且刻度文本分别为“A”和“B”。
根据该文件,我想这会做到这一点:
heatmap.plotly <- plot_ly(z=c(interval.df$expr),x=interval.df$sample,y=interval.df$gene,colors=interval.cols2,type="heatmap",colorscale=color.df,
colorbar=list(title="score",tickmode='array',tickvals=c(1:6),ticktext=names(interval.cols),len=0.2,outlinecolor="white",bordercolor="white",borderwidth=5,bgcolor="white")) %>%
layout(xaxis=list(title="Cluster",tickmode="array",tickvals=c(250,750),ticktext=c("A","B")))
但我看到在x轴上没有刻度。
此:
heatmap.plotly <- plot_ly(z=c(interval.df$expr),x=interval.df$sample,y=interval.df$gene,colors=interval.cols2,type="heatmap",colorscale=color.df,
colorbar=list(title="score",tickmode='array',tickvals=c(1:6),ticktext=names(interval.cols),len=0.2,outlinecolor="white",bordercolor="white",borderwidth=5,bgcolor="white")) %>%
layout(xaxis=list(title="Cluster",tick0=250,dtick=500,nticks=2,ticktext=c("A","B")))
打印interval.df$sample[c(250,750)]
而非c("A","B")
,虽然在所希望的位置: