Practice makes perfect Practice makes perfect

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• 삶

  Poem 2007. 8. 2. 23:11

  삶 복잡함 또 다른 의미로 이해하기 어려움. 삶은 쉬울 듯 하면서 늘 내게 여운을 남긴다. 2007.08.02

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• First R code

  Computer/statistics with R 2007. 8. 2. 19:29

  R is the powerful tool to do Statistical Computing. This is the first R code for me. In the R to run the code, >> source("dipole.R") >> dipole() >>q() calibrate

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• --MARK-- in /var/log/messages

  Computer/linux 2007. 7. 31. 06:04

  [En] Strange output in the /var/log/messages file as Jul 30 22:13:18 localhost -- MARK -- Jul 30 22:33:18 localhost -- MARK -- this is a default option or the syslogd. With the man page of the syslogd, -m interval The syslogd logs a mark timestamp regularly. The default interval between two -- MARK -- lines is 20 minutes. This can be changed with this option. Setting the interval to zero turns i..

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• xset command

  Computer/linux 2007. 7. 27. 23:16

  Several options about xset xset -dpms : disable DPMS (energy star) xset +dpms: enable DPMSxset dpms 0 0 0 : disable 'standby' 'suspend' 'off' mode respectively.xset dpms 300 600 900 : enable 'standby' 'suspend' 'off' mode with 300, 600, and 900 seconds respectively.xset s off : off the screen saver xset s on : on the screen saver xset q : the current settings will be displayed.

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• GD Graphics Library

  Computer/linux 2007. 7. 26. 00:40

  It is the time to use a graphic library in the C program. debian and ubuntu package is apt-cache search gd |grep 'GD Graphics Library' the web site of the library is http://www.libgd.org one old basic example is http://www.libgd.org/%22OldBasics%22

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• t distribution and GSL random number generator

  old memories/physics 2007. 7. 2. 22:57

  t distribution with large degrees of freedom is the same as Normal (Gaussian) distribution with mean 0 and standard devitation 1 approximately.normal[x_] := PDF[NormalDistribution[0, 1], x]t[x_, nu_] := PDF[StudentTDistribution[nu]], x]Plot[{normal[x], t[x, 3], t[x, 6], t[x, 20]}, {x, -6, 6}, PlotStyle -> {Black, Gray, Blue, Red}]Five real random numbers x0 from the Gaussian distribution (0,1): ..

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• uuid and local

  Computer/linux 2007. 6. 27. 07:37

  wants to know about UUID ls -lta /dev/disk/by-uuid/ and locale more /var/lib/locales/supported.d/local

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• warning: comparison between signed and unsigned integer expressions

  Computer/linux 2007. 6. 24. 08:20

  warning: comparison between signed and unsigned integer expressions [en] This warning is due to "size_t n". I use n in the code as following: for(i=0;i

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