Return the relationship of samples acorrding from the gene expression values. Click Here to see an example figure. HCA wikipedia
The HCA will be accomplished by R using hclust and plot functions
The expression matrix file must contain row and column names and separated by Tabs, generally the row names are the unigene IDs and the column names are the sample names, displayed as follow.
GeneID sample1 sample2 sample3 sample4
gene00001 1300.99 1665.09 1352.56 1121.33
gene00002 3454.18 355.8 440.78 2260.36
gene00003 1873.72 551.4 1529.66 519.94 ...