High number of cell lines with copy number equal to 0

[jnoorbak]

Thanks all for reporting this issue. Please see the following post for more information:

[IMPORTANT UPDATE] Issues with DepMap 20Q4 data

We have discovered issues with files in the original 20Q4 data release that have now been addressed on the public DepMap portal. Updates have been made to the ‘DepMap Public 20Q4’ dataset and are now available in the ‘DepMap Public 20Q4 v2’ dataset (as of Dec. 22, 2020). There were two separate sets of issues, described in more detail below. The first set of issues affected the 20Q4 copy number data, as well as the CRISPR (Avana) CERES data, which is dependent on copy number information. In the…