Author Archives: Elin Videvall

About Elin Videvall

Elin is a PhD candidate in the Molecular Ecology and Evolution Lab, Lund University, Sweden. She studies birds and their microbes by analysing genomes, transcriptomes, and microbiomes. You can find her on Twitter: @ElinVidevall

Visualize your genome assemblies

Bandage (a Bioinformatics Application for Navigating De novo Assembly Graphs Easily), is a program that creates visualisations of sequence assemblies that you can interact with. When assembling a genome with your favorite assembler, you are usually building graphs, from which … Continue reading

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Missing symbionts: do some animals lack resident gut microbiomes?

It seems like the field of “gut microbiomics” is having major breakthroughs almost every month these days. It’s very exciting to follow what is being discovered and gut microbes have now been linked with an array of important host traits, … Continue reading

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Easily aggregate bioinformatic sample output with one tool

Today I’m going to write about one of my favorite bioinformatic tools, MultiQC. If you’ve used it, you know why, and if you haven’t, prepare to be amazed. Many bioinformatic software produce output on a per-sample basis. That is, you … Continue reading

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N50 for transcriptome assemblies

This is the sixth in a series of posts where we explain the N50 (Nx) metric, discuss the problems surrounding it, give solutions to those problems, and suggest an alternative N50 metric for transcriptome assemblies. Transcriptome assemblies are inherently different … Continue reading

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A solution to the N50 misassembly problem

This is the fifth in a series of posts where we explain the N50 (Nx) metric, discuss the problems surrounding it, give solutions to those problems, and suggest an alternative N50 metric for transcriptome assemblies. The misassembly problem of N50 that … Continue reading

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A solution to the N50 filtering problem

This is the fourth in a series of posts where we explain the N50 (Nx) metric, discuss the problems surrounding it (1, 2), give solutions to those problems, and suggest an alternative N50 metric for transcriptome assemblies. In the two … Continue reading

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The N50 misassembly problem

This is the third in a series of posts where we explain the N50 (Nx) metric, discuss the problems surrounding it, give solutions to those problems, and suggest an alternative N50 metric for transcriptome assemblies. In our previous post, we … Continue reading

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The N50 filtering problem

This is the second in a series of posts where we explain the N50 (Nx) metric, discuss the problems surrounding it, give solutions to those problems, and suggest an alternative N50 metric for transcriptome assemblies. The problem with N50 (or … Continue reading

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Posted in genomics | Tagged , , | 1 Comment

What’s N50?

This is the first in a series of posts where we explain the N50 (Nx) metric, discuss the problems surrounding it, give solutions to those problems, and suggest an alternative N50 metric for transcriptome assemblies. Most genome assembly papers include … Continue reading

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Posted in genomics | Tagged , , | 6 Comments

Phylogenetic trees in R using ggtree

Recently, one R package which I like to use for visualizing phylogenetic trees got published. It’s called ggtree, and as you might guess from the name it is based on the popular ggplot2 package. With ggtree, plotting trees in R has … Continue reading

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Posted in bioinformatics, howto, phylogenetics, R | Tagged , , , | 2 Comments