Description Usage Arguments Details Author(s) See Also Examples
Given a number of points (generally representing the number of points on a plot's axis), and a vector of chromosome lengths - will generate a vector of the same length as the one passed in containing scaling factors for each chromosome.
1 |
points |
The number of points to scale the chromosome length to. |
cLengths |
A vector of chromosome lengths. |
method |
Determines whether to use relative or absolute scaling. Default is "max" (absolute). |
chrom |
Which chrom to determine the scale for |
The scale factor is calculated in a manner based on the method
argument. If method is max
, the factor is derived by dividing the
points argument by each chromosome's length (in base pairs). If the
method chosen is relative
, then the scale is determined by dividing
the points argument by the maximum chromsome length, and applying that
value to each chromosome.
Jeff Gentry
1 2 3 4 5 6 7 8 9 10 | ## A bit of a hack to not have a package dependency on hgu95av2
## but need to fiddle w/ the warn level to not fail the example anyways.
curWarn <- options(warn=0)
on.exit(options(warn), add=TRUE)
if (require("hgu95av2.db")) {
z <- buildChromLocation("hgu95av2")
for (sc in c("max","relative"))
scale <- cScale(1000, chromLengths(z),sc,"Y")
} else print("This example needs the hgu95av2 data package")
|
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