在树莓派上设置透明代理
目前, 我在树莓派上搭建了VPN. 只有树莓派联网, 其他设备都通过VPN连接树 …
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Mathematica 生成随机4阶矩阵
代码很简单，
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ranOrt := Orthogonalize[RandomInteger[4, {4, 4}]] ranOrt // MatrixForm P = ranOrt; P.Transpose[P] // Simplify // MatrixForm |
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Mathematica绘制美元对人民币走势图
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startdate = "12/31/1980"; enddate = DateString[{"Month", "/", "Day", "/", "Year"}]; fxdownload = Import@StringJoin[ "http://www.federalreserve.gov/datadownload/Output.aspx?rel=H10&\ series=356f2a973bbb516442c693dc19615b69&lastObs=&from=", startdate, "&to=", enddate, "&filetype=csv&label=include&layout=seriescolumn"]; fxdata = Drop[fxdownload, 6]; datelistfx = Cases[fxdata, {_, _?NumberQ}]; datelistfx[[All, 1]] = Join[ToExpression@StringSplit[#, "-"], {0, 0, 0.}] & /@ datelistfx[[All, 1]]; DateListPlot[datelistfx, Joined -> True, PlotLabel -> StringJoin["Daily CNY/USD from ", DateString[datelistfx[[1, 1]], {"Day", "/", "Month", "/", "Year"}], " to ", DateString[ datelistfx[[-1, 1]], {"Day", "/", "Month", "/", "Year"}]]] |
最简单的传送文件的方式:使用mutt+msmtp发送邮件
首先安装mutt+msmtp+openssl sudo apt-get inst …
Mathemathica递归定义函数的最简单例子
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a[0] = 1; a[n_] := 2*a[n - 1] + 1; Table[a[k], {k, 0, 5}] |
AutoRun McMyAdmin at reboot/start (Linux/Ubuntu)
1. Login as root, create a file as vim / …
AutoRun McMyAdmin at reboot/start (Linux/Ubuntu) Read more »