Plotting two categorical variables against a continuous variable, map continuous variable to colorbar or marker size

Hello,

I would like to construct a plot that has a categorical variable on the y-axis (protein names) and another categorical variable on the x-axis (treatment conditions), and numerical data (expression values) scaled to a colorbar or marker size. How might I go about doing this?

Thanks!

[Adam Danz]

In which part of that multi-step process are you stuck?

[Michael Wagner]

Thanks for your quick reply!

I think I may have figured something out-- I just used the heatmap function. I imported protein names as a string array ("proteins") and created a numeric matrix of the expression data by copying and pasting from Excel ("cdata"). From there I created a cell array of the categorical conditions ("conditions"). I used this code:

h=heatmap(conditions, proteins, cdata)

I'm fairly pleased with the result, but I do think it would be better if instead of the colormap, marker size scaled to cdata would be a better visual for my results. I don't know where to start with that process, however.

[Adam Danz]

Nice work!

If you want to represent magnitude by marker size, here are some functions to look into that allow you to change the marker size of each point.

scatter(x,y,sz,c)

gscatter(x,y,g,clr,sym,siz) for grouped data