eisaR settings for three biological replicates
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Last seen 4 months ago


While running the eisaR program with three biological replicates each for control and treated samples instead of two replicates (as shown in the vignette), is there any change to be made in the program? Can it be done in the default mode, i.e., "Run eisa convenienty?" This approach resulted in error due to which I switched to "run eisa step-by-step" mode. In this approach, I got the following error:

> y <- estimateDisp(y, design)
Warning message:
In estimateDisp.default(y = y$counts, design = design, group = group,  :
  No residual df: setting dispersion to NA
> fit <- glmFit(y, design)
Error in glmFit.default(y = y$counts, design = design, dispersion = dispersion,  : 
  NA dispersions not allowed

Kindly guide me as to how to rectify this issue and what changes need to be made in the command.

Thank you

Regards Nishanth

eisaR edgeR • 145 views
Entering edit mode
Last seen 6 hours ago
WEHI, Melbourne, Australia

You have most likely setup up the design matrix incorrectly.

You don't shown us how you created the design matrix, so we can't tell what you might have done wrong. When you post a question here you need to give all the code necessary to create the error, not just one or two commands in isolation with undefined input arguments. See https://www.bioconductor.org/help/support/posting-guide/

Entering edit mode

Thank you, Dr. Smyth; I corrected the column titles in the matrix and the error was solved. I have gone through the posting-guide and will stick to the guidelines. Thank you.


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