Metadata and expression data matrix

The expression data matrix can be accompanied with metadata in the form of another Excel or CSV file. A header row must be present in the expression matrix to link the sample to the identifier in the metadata. The link needs to be an exact match.

Importing metadata is however optional.

For an example of a metadata table that matches the expression matrix described above, see figure 3.3.

Image count_matrix_metadata
Figure 3.3: Metadata describing the samples from figure 3.1.

An example of a workflow using the Import Expression Data tool is described in the next section.