ExpressionSet: any shortcut for number-of-samples and number-of-features?
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aush ▴ 40
@aush-9128
Last seen 5 months ago
United States

I often need to retrieve number of samples or features of a given ExpressionSet. I use constructs like dim(es)[[2]], and just to make my code easier to read I wrapped it into functions, so that I can call it like nSamples(es). Hence two questions:
1) Maybe there's already a function for that?
2) if not, is it a good practice to use dim() for that purpose, or I should call something else?

expressionSet • 102 views
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@martin-morgan-1513
Last seen 4 hours ago
United States

nrow() and ncol() return features and samples directly, although these are not as semantically rich as nSamples()

> nrow(ExpressionSet())
Features
       0
> ncol(ExpressionSet())
Samples
      0
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