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xwu / utn28-default-operators.md
Last active October 10, 2017 23:50
UTN28 Default Operators

Extracted from UTN28

"The following table gives the default math keywords, their target characters and codes along with spacing and linear-format build-up properties."

Omitted from the original table are operands, enclosures, spaces, big/long variants, and non-NFKC characters. Three characters that default to their emoji variants on iOS, and one related character, are excised.

Keyword Glyph Code Spacing LF Property
pm ± U+00B1 unary/binary unary/binary
times × U+00D7 binarynsp normal
@xwu
xwu / swift-default-operators.md
Last active October 12, 2017 01:46
Swift Default Operators
Glyph Code Description
! U+0021 EXCLAMATION MARK
% U+0025 PERCENT SIGN
& U+0026 AMPERSAND
* U+002A ASTERISK
+ U+002B PLUS SIGN
- U+002D HYPHEN-MINUS
/ U+002F SOLIDUS
< U+003C LESS-THAN SIGN
@xwu
xwu / pca.r
Created July 22, 2014 22:56
Principal component analysis of gene expression microarray datasets
my.data.frame <- read.delim("tab_delimited_file_with_probeset_ids_in_first_column.txt", row.names=1)
my.data.matrix <- as.matrix(my.data.frame)
# PCA by sample:
# center each gene (mean) without scaling
# scale each sample (root mean square) without centering
# transpose the matrix to PCA by sample instead of by gene
a <- scale(t(my.data.matrix), center=TRUE, scale=FALSE)
b <- scale(t(a), center=FALSE, scale=TRUE)
@xwu
xwu / NNNN-rename-sequence-elements-equal.md
Last active November 12, 2017 05:34
Rename Sequence.elementsEqual

Rename Sequence.elementsEqual

  • Proposal: SE-NNNN
  • Authors: Xiaodi Wu
  • Review Manager: TBD
  • Status: Awaiting review

During the review process, add the following fields as needed:

@xwu
xwu / dna3bit.py
Created March 13, 2022 20:50
Command line utility for encoding and decoding SEQC 3-bit representations of DNA
import argparse
import sys
from functools import reduce
from typing import Iterator
def encode(raw: str) -> int:
return reduce(lambda x, y: x * 8 + y,
map(lambda x: x % 32 % 5 + 3, raw.encode()))
def _decode(cooked: int) -> Iterator[int]: