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Similarity matrix task is only available on bulk RNA-seq count matrix data node. It is used to compute the correlation of every sample/or feature vs every other sample/or feature. The result is a matrix with the same set of samples/or features on rows and columns, the value in the matrix is correlation coefficient --r.
Click on Similarity matrix task in Correlation section on the menu (Figure 1)
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When the dialog opens, you will be asked to select whether the calculation samples or features (Figure 2). The are three correlation method options:
Pearson: linear correlation:
Spearman: rank correlation:
Kendal: rank correlation:
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Click Finish to run the task. The output report of this task can be displayed in heatmap and/or table in the data viewer.
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