Someone just gave me some data with a small microarray. There are four exposed animals (Exp.1 through Exp.4) and four control animals (Exp.5 through Exp.8). The microarray has 96 genes, as well as some housekeeping genes
††† Position†† UniGene† Genebank Symbol
97††††††† 97†††††† N/A†† L08752†† PUC18
98†††††† 100†††† Blank†††† Blank† Blank
99†††††† 103†† Mm.5289††† M32599†† Gapd
100††††† 105†† Mm.5246 NM_008907†† Ppia
101††††† 109† Mm.13020 NM_009438 Rpl13a
102††††† 111 Mm.195066††† M12481†† Actb†††††
To read this data into R, I first created a comma separated value file from Excel. Then I used the read.csv() command in R to create a data frame. When I have time, I will try to document all the steps in the data analysis of this small microarray.
You can find an earlier version of this page on my original website.