R console theme

July 26, 2014 less than 1 minute read

R console 并没有提供 theme 选项，只有自己配 color。在 “X:[R-folder]\etc\Rconsole” 文件中可以指定 color（在 ## Colours for console and pager(s) 小节）（color 的名称在 “X:[R-folder]\etc\rgb.t...

Octave: fmincg and Anonymous Functions

July 26, 2014 less than 1 minute read

One-vs-all Classfication 的作业里用到了 fmincg，但是语法有点奇怪：

R Generating Random Numbers and Random Sampling

July 8, 2014 3 minute read

R Debugging

July 8, 2014 1 minute read

1. log

Derivative and Partial Derivative

July 6, 2014 1 minute read

感谢 良田围 网友在 偏导数有什么用 问题上的精彩回复，以下全文摘抄，仅加音标并稍微排版。