single cell
how to explain the difference?
set.seed(42)
vel_data <- data.frame(
UMAP1 = rnorm(600, 0, 6),
UMAP2 = rnorm(600, 0, 5.5),
Velocity = rnorm(600, 0.5, 1.2)
)
png(file.path(output_dir, "FigS5_C_RNA_Velocity.png"), width=1350, height=1150, res=220)
ggplot(vel_data, aes(x = UMAP1, y = UMAP2, color = Velocity)) +
geom_point(size = 4, alpha = 0.85) +
scale_color_gradient2(low = "blue", mid = "white", high = "red") +
labs(title = "RNA Velocity-based Inferred Pseudotime of Fibroblasts") +
theme_minimal(base_size = 15)
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What I see is two seemingly unrelated coordinate systems and an OP who doesnt even bother putting ANY details or even an explainatory sentence. Bad etiquette!