ttest returns a function of one argument with bindings for
The function, when evaluated, performs a t-test using
the covariate. It returns
TRUE if the p value for a difference
in means is less than
The p-value for the test.
If set to
When the data can be split into two groups (diseased and normal for example) then we often want to select genes on their ability to distinguish those two groups. The t-test is well suited to this and can be used as a filter function.
This helper function creates a t-test (function) for the specified
covariate and considers a gene to have passed the filter if the
p-value for the gene is less than the prespecified
ttest returns a function with bindings for
p that will perform a t-test.
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