preconditions: Check inputs against known limitations
In Bioconductor/DDayChallenge: Exercises to Correct Common Programming Errors and Inefficiences
Description
Usage
Arguments
Details
Value
Examples
Description
Checking inputs allows code to ‘fail early’ with clear error
messages, rather tha failing cryptically later.
Usage
1
Arguments
x
a scalar (length 1) numeric vector to be compared to a
random number.
Details
Update the code below to check that the variable used in the
if is scalar, to avoid a mysterious message “the
condition has length > 1 and only the first element will be
used”. Use stopifnot() as a convenient way to test the pre-
conditions.
Find examples on the Bioconductor support site where this error has
confused users.
Value
A scalar numeric vector. If the input is greater than a
random normal deviate, the return value is the random normal
deviate. Otherwise, the return value is the orignal input.
Examples
1
preconditions(.1)
Bioconductor/DDayChallenge documentation built on May 6, 2019, 7:49 a.m.
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Description Usage Arguments Details Value Examples
Description
Checking inputs allows code to ‘fail early’ with clear error messages, rather tha failing cryptically later.
Usage
1 |
Arguments
x |
a scalar (length 1) numeric vector to be compared to a random number. |
Details
Update the code below to check that the variable used in the
if is scalar, to avoid a mysterious message “the
condition has length > 1 and only the first element will be
used”. Use stopifnot() as a convenient way to test the pre-
conditions.
Find examples on the Bioconductor support site where this error has confused users.
Value
A scalar numeric vector. If the input is greater than a random normal deviate, the return value is the random normal deviate. Otherwise, the return value is the orignal input.
Examples
1 | preconditions(.1)
|
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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