Generate blast links with NCBI blast, easy to use row.names()

[yzhong005]

For newbies, who are not familiar with shell. Or not family with other blast tools or packages. If you want to generate pairwise blast links with online NCBI Blast (https://blast.ncbi.nlm.nih.gov/Blast.cgi), here are some tricks and codes that can make your life easier.
After pairwise blast with NCBI blast, download the hit table .csv, and read it. Change the colnames as
blast_name<-c("seq_id","seq_id2","identity","length","mismatches","gaps","start","end","start2","end2","evalue","bitscores")
Double-check that your seq_id and seq_id2 are correct and match with your seqs data.
Then you can use it to draw your links now.

[thackl]

Thanks! As an alternative, you can also use gggenomes default names for blast tables. And if you need to swap your seq_id and seq_id2, you can use swap_query()

library(tidyverse)
library(gggenomes)

s0 <- tibble(
  seq_id = c("BVI_023A", "Cflag_131"),
  length = 5000)
  
l0 <- read_csv("~/Downloads/73595JMU114-Alignment-HitTable.csv", col_names=def_names("blast"))

gggenomes(seqs=s0, links=l0) +
  geom_seq() + geom_link()