r - 如何突出显示 Bioconductor Enhancedvolcano 中的特定基因?
问题描述
我喜欢这个包EnhancedVolcano
。我的数据是 RNAseq,我用 DESeq2 对其进行分析。我想将结果绘制为火山图,在其中突出显示我选择的基因列表pick_genes。我已成功更改 pointSize 并且我正在使用 SelectLab 突出显示,但是当我想为所选基因赋予另一种颜色时,我会卡住。我在结果文件中添加了一个逻辑向量,指定要突出显示的基因。我努力了
col = ifelse...
它不起作用,所有点都是灰色的。
EnhancedVolcano(res_complete,
lab = res_complete$gene_name,
x = "log2FoldChange",
y = "pvalue",
pCutoff = 10e-3,
FCcutoff = 1,
xlim = c(-10, 10),
ylim = c(0, -log10(10e-12)),
col = (ifelse(res_complete$picked_genes == T, "forestgreen", "grey60")),
pointSize = (ifelse(res_complete$picked_genes == T, 5, 0.5)),
labSize = 2.5,
selectLab = picked_genes,
shape = 16,
shade = res_complete$picked_genes == T,
shadeFill = "forestgreen",
shadeSize = 5,
shadeLabel = res_complete$picked_genes,
boxedLabels = TRUE,
title = "DESeq2 results",
subtitle = "Differential expression HC vs RA",
caption = "FC cutoff, 1; p-value cutoff, 10e-3",
legendPosition = "right",
legendLabSize = 14,
colAlpha = 0.9,
drawConnectors = TRUE,
hline = c(10e-8),
widthConnectors = 0.2)
我也试过:
colCustom =ifelse...
但是我收到一条错误消息...
错误:美学长度必须为 1 或与数据 (58735) 相同:颜色
EnhancedVolcano(res_complete,
lab = res_complete$gene_name,
x = "log2FoldChange",
y = "pvalue",
pCutoff = 10e-3,
FCcutoff = 1,
xlim = c(-10, 10),
ylim = c(0, -log10(10e-12)),
colCustom = (ifelse(res_complete$picked_genes == T, "forestgreen", "grey60")),
pointSize = (ifelse(res_complete$picked_genes == T, 5, 0.5)),
labSize = 2.5,
selectLab = picked_genes,
shape = 16,
shade = res_complete$picked_genes == T,
shadeFill = "forestgreen",
shadeSize = 5,
shadeLabel = res_complete$picked_genes,
boxedLabels = TRUE,
title = "DESeq2 results",
subtitle = "Differential expression HC vs RA",
caption = "FC cutoff, 1; p-value cutoff, 10e-3",
legendPosition = "right",
legendLabSize = 14,
colAlpha = 0.9,
drawConnectors = TRUE,
hline = c(10e-8),
widthConnectors = 0.2)
有人能想出解决这个问题的办法吗?
解决方案
我找到了,终于明白了。colCustom 每个点都需要一对,一个颜色和一个名称。我创建了矩阵键值
keyvals <- ifelse(
res_complet$picked_genes < T, 'grey60',
'forestgreen')
names(keyvals)[keyvals == 'forestgreen'] <- 'picked'
names(keyvals)[keyvals == 'grey60'] <- 'rest'
` 比我用它代替 col=
`
EnhancedVolcano(res_complete,
lab = res_complete$gene_name,
x = "log2FoldChange",
y = "pvalue",
pCutoff = 10e-3,
FCcutoff = 1,
xlim = c(-10, 10),
ylim = c(0, -log10(10e-12)),
pointSize = (ifelse(res_complete$picked_genes == T, 5, 0.5)),
labSize = 2.5,
shape = c(19, 19, 19, 19),
selectLab = picked_genes,
boxedLabels = TRUE,
title = "DESeq2 results",
subtitle = "Differential expression HC vs RA",
caption = "FC cutoff, 1; p-value cutoff, 10e-3",
legendPosition = "right",
legendLabSize = 14,
colCustom = keyvals,
colAlpha = 0.9,
drawConnectors = TRUE,
hline = c(10e-8),
widthConnectors = 0.2)
`
为了让所有点都可见,我在逻辑列 res_complete$picked_genes 之后对结果数据框进行了排序,并再次制作了火山。瞧