How do I set values to No Data in Idrisi

I am conducting a trend analysis of SST from AVHRR data.  My cloud flagged pixels are set to zero.  I want to remove these pixels entirely from the analysis as zero could be a legitimate sea surface temperature.  I have 1456 images per dataset so individual masking is not feasible.  I understand Idrisi does not have a No Data option, but I am sure others must have had a similar problem.  Do you have a recommendation?

Thank you very much,

Michelle Howard

University of Idaho, Dept. of Geography


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