Filtering your data

1. Why filter? Many data sets contain tens to hundreds of thousands of genes, so filtering out the ones that contain little biological information makes doing analyses much easier. If the data set is not large, then you may not need to filter it.
2. Go to the main menu on top and click Adjust Data ? Data Filters ? Variance Filters. Put in the percentage that you wish to filter out. We will use 50% here as a default, but you can choose a lower percentage to filter out even more genes.
3. The filtered data can be seen by using the navigation tree on the left. It is under Analysis Results -> Data Filter -> Expression Image. If you go further and look under parameters, it will tell you the type of filter that was used and the percentage filtered out.

From now on, all tests done on the sample will be done on the filtered data. The algorithm toolbar on top, where the icons say Clustering, Statistics,… etc, is where all the main modules are found. The same modules can also be found under Analysis in the main toolbar above it.