Author Archives: Jenny

Dos and don’ts for a heatmap color scale

Heatmaps. We see them all over the scientific journals – the shading matrices that convey meaningful stories. Wanna interpret gene expressions? Draw a heatmap. Gotta examine the correlation among variables? Get it done with a heatmap. It seems that the shading has breathed such life into those cheerless matrices of… Read more »

How to read PCA biplots and scree plots

Principal component analysis (PCA) has been gaining popularity as a tool to bring out strong patterns from complex biological datasets. We have answered the question “What is a PCA?” in this jargon-free blog post — check it out for a simple explanation of how PCA works. In a nutshell, PCA… Read more »

Principal component analysis explained simply

As we are entering the era of Big Data, everyone and their moms seem to be talking about PCA. All the papers you read mention PCA (with lots of jargon, of course). Half of the seminars you’ve been to this month touch on PCA. Your boss/collaborators suggest trying PCA on… Read more »

How to draw a modified box plot

      No Comments on How to draw a modified box plot

Box plots, a.k.a box-and-whisker plots, are an excellent way to compare groups. They are intuitive: viewers can see samples’ medians, distribution, and variabilities with a quick glance. They allow comparing samples of different sizes; for example, a set of 50 data points with a set of 30. They don’t even… Read more »

How to make a histogram in a breeze

Histogram is one of the most popular tools to study the distribution of a variable. How to draw a histogram in a simple fashion, yet still keep it aesthetically pleasing? No worries. Here we show you how easy it can be to create and fine-tune a histogram with BioVinci. The… Read more »