Complementing a Strand of DNA
In DNA strings, symbols 'A' and 'T' are complements of each other, as are 'C' and 'G'. The reverse complement of a DNA string s is the string sc formed by reversing the symbols of s, then taking the...
View ArticleRabbits and Recurrence Relations
Problem A sequence is an ordered collection of objects (usually numbers), which are allowed to repeat. Sequences can be finite or infinite. Two examples are the finite sequence (Π,−√2,0,Π) and the...
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使用ImageMagick压缩TIFF
TIFF (Tagged Image File Format)拥有更宽的线性动态范围，所以在专业的图片处理上，一直是一个通用的文件格式。 最近一篇发表在Metallomics的文章，我本来做的图片都是PDF格式，矢量图最好了，文件特别小，还可以任意放大。不过杂志社要求600DPI的TIFF或EPS。...
View ArticleConsensus and Profile
Problem A matrix is a rectangular table of values divided into rows and columns. An m×n matrix has m rows and n columns. Given a matrix A, we write Ai,j to indicate the value found at the intersection...
View ArticleInstall Emacs on Mac
package manager 之前一直用NetBSD的pkgsrc做为各种Unix-like系统的包管理系统，pkgsrc在自己内部解决依赖关系，这点对于生产环境来说，是很好的一个优点，我通常会在服务器里装一个pkgsrc，在用户目录下，维护一套UNIX软件。但是用在自己的机器上，内部解决软件依赖，就是个缺点，浪费编译时间和硬盘空间。...
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Run remote R in Emacs with ESS
Emacs is a great front-end for most of the command line tools. Although R-Studio is pretty good, I think Emacs/ESS is better. I’ve always used Emacs/ESS to run R, since 2007 on Ubuntu, on Windows, and...
View Articlelocal blast
I was asked to set up a local blast for the lab. Blast can be installed directly using apt in debian and it turns out to be easy. ?View Code BASH1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16...
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