Error in scv$pl$velocity_embedding_stream

[ZivTQ]

Hi
when i studied with this Tutorial,
https://github.com/JEFworks-Lab/veloviz/blob/package_extras/docs/scVeloVignette.md

I got this error:
#Error: AttributeError: can't set attribute 'categories'

somebody know what happened?
thank you

[LylaAtta123]

Hi,

Thanks for trying out the package! Can you please provide the part of the code that generated the error?

Thanks!

[ZivTQ]

thanks for your reply:
The code was listed as below:
`veloviz = buildVeloviz(
curr = curr, proj = proj,
normalize.depth = TRUE,
use.ods.genes = TRUE,
alpha = 0.05,
pca = TRUE,
nPCs = 20,
center = TRUE,
scale = TRUE,
k = 20,
similarity.threshold = 0.2,
distance.weight = 1,
distance.threshold = 1,
weighted = TRUE,
verbose = FALSE
)

emb.veloviz <- veloviz$fdg_coords

plotEmbedding(emb.veloviz,
colors = cell.cols[rownames(emb.veloviz)],
main='VeloViz with dynamical velocity',
xlab = "VeloViz X", ylab = "VeloViz Y",
alpha = 0.8,
cex.lab = 1.5)

plotVeloviz(veloviz)

a.plot <- adata

#remove unconnected cells from anndata object
connected.cells <- rownames(emb.veloviz)
a.plot.vv <- a.plot[a.plot$obs_names$isin(connected.cells)]
a.plot.vv$obsm$update("X_veloviz1" = emb.veloviz)

#get colors
plot.cols = unique(cell.cols)
c = unlist(sapply(c(1:length(col)), function(x) which(plot.cols == col[x])))
plot.cols = plot.cols[c]

#plotting params
pt.size = 50
dnsty = 0.7
plt.size = c(3.5,3.5)

scv$pl$velocity_embedding_stream(a.plot.vv,
basis='umap',
density = 0.8,
cutoff_perc = 0,
n_neighbors = 20L,
title = "",legend_fontoutline = 2,
size = 50,
alpha = 0.6,
legend_fontsize = 12,
linewidth = 1.5,
show = FALSE,
figsize = c(5,5),
palette = plot.cols)
`
All the code run successfully, except scv$pl$velocity_embedding_stream. I got error"Error: AttributeError: can't set attribute 'categories'"

thanks