Description Usage Arguments Details Value Author(s) Examples
Apply a user-defined function with a sliding window.
1 2 3 4 5 6 | snpgdsSlidingWindow(gdsobj, sample.id=NULL, snp.id=NULL,
FUN=NULL, winsize=100000L, shift=10000L, unit=c("basepair", "locus"),
winstart=NULL, autosome.only=FALSE, remove.monosnp=TRUE, maf=NaN,
missing.rate=NaN, as.is=c("list", "numeric", "array"),
with.id=c("snp.id", "snp.id.in.window", "none"), num.thread=1,
verbose=TRUE, ...)
|
gdsobj |
an object of class |
sample.id |
a vector of sample id specifying selected samples; if NULL, all samples are used |
snp.id |
a vector of snp id specifying selected SNPs; if NULL, all SNPs are used |
FUN |
a character or a user-defined function, see details |
winsize |
the size of sliding window |
shift |
the amount of shifting the sliding window |
unit |
|
winstart |
|
autosome.only |
if |
remove.monosnp |
if TRUE, remove monomorphic SNPs |
maf |
to use the SNPs with ">= maf" only; if NaN, no MAF threshold |
missing.rate |
to use the SNPs with "<= missing.rate" only; if NaN, no missing threshold |
as.is |
save the value returned from |
with.id |
"snp.id", "snp.id.in.window" or "none" |
num.thread |
the number of (CPU) cores used; if |
verbose |
if TRUE, show information |
... |
optional arguments to |
If FUN="snpgdsFst"
, two additional arguments "population"
and
"method"
should be specified. "population"
and "method"
are defined in snpgdsFst
. "as.is"
could be "list" (returns
a list of the values from snpgdsFst
), "numeric" (
population-average Fst, returns a vector) or "array" (population-average and
-specific Fst, returns a ‘# of pop + 1’-by-‘# of windows’ matrix, and the first
row is population-average Fst).
Return a list
Xiuwen Zheng
1 2 3 4 5 6 7 8 9 10 11 12 | # open an example dataset (HapMap)
genofile <- snpgdsOpen(snpgdsExampleFileName())
# sliding windows
rv <- snpgdsSlidingWindow(genofile, winsize=500000, shift=100000,
FUN=function(...) NULL)
# plot
plot(rv$chr1.num, ylab="# of SNPs in the sliding window")
# close the genotype file
snpgdsClose(genofile)
|
Loading required package: gdsfmt
SNPRelate -- supported by Streaming SIMD Extensions 2 (SSE2)
Sliding Window Analysis:
Excluding 8 SNPs (monomorphic: TRUE, MAF: NaN, missing rate: NaN)
Working space: 279 samples, 9,080 SNPs
using 1 (CPU) core
window size: 500000, shift: 100000 (basepair)
Chromosome Set: 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23
Mon May 21 20:46:51 2018, Chromosome 1 (716 SNPs), 2448 windows
Mon May 21 20:46:51 2018, Chromosome 2 (742 SNPs), 2416 windows
Mon May 21 20:46:51 2018, Chromosome 3 (609 SNPs), 1985 windows
Mon May 21 20:46:51 2018, Chromosome 4 (562 SNPs), 1894 windows
Mon May 21 20:46:51 2018, Chromosome 5 (566 SNPs), 1797 windows
Mon May 21 20:46:51 2018, Chromosome 6 (565 SNPs), 1694 windows
Mon May 21 20:46:51 2018, Chromosome 7 (472 SNPs), 1573 windows
Mon May 21 20:46:51 2018, Chromosome 8 (488 SNPs), 1445 windows
Mon May 21 20:46:51 2018, Chromosome 9 (416 SNPs), 1393 windows
Mon May 21 20:46:51 2018, Chromosome 10 (483 SNPs), 1343 windows
Mon May 21 20:46:51 2018, Chromosome 11 (447 SNPs), 1338 windows
Mon May 21 20:46:51 2018, Chromosome 12 (427 SNPs), 1316 windows
Mon May 21 20:46:51 2018, Chromosome 13 (344 SNPs), 948 windows
Mon May 21 20:46:51 2018, Chromosome 14 (281 SNPs), 847 windows
Mon May 21 20:46:51 2018, Chromosome 15 (262 SNPs), 774 windows
Mon May 21 20:46:51 2018, Chromosome 16 (278 SNPs), 873 windows
Mon May 21 20:46:51 2018, Chromosome 17 (207 SNPs), 773 windows
Mon May 21 20:46:51 2018, Chromosome 18 (266 SNPs), 753 windows
Mon May 21 20:46:51 2018, Chromosome 19 (120 SNPs), 627 windows
Mon May 21 20:46:51 2018, Chromosome 20 (229 SNPs), 602 windows
Mon May 21 20:46:51 2018, Chromosome 21 (126 SNPs), 311 windows
Mon May 21 20:46:51 2018, Chromosome 22 (116 SNPs), 312 windows
Mon May 21 20:46:51 2018, Chromosome 23 (358 SNPs), 1507 windows
Mon May 21 20:46:51 2018 Done.
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