Gnuplot Examples (1): Plotting With Double-yaxis

Gnuplot is one of the most useful tool for plotting all kinds of figures in Linux system. Here, we give an simple example to plot distribution function with gnuplot. We will plot the function of two kind of molecules A and B in a liquid, along the normal direction (z-axis),ie., as a function of z coordinate. The distribution file are dist_A.dat and dist_B.dat. The value is too different to each other, we plot them with different scale. The details can be found in the script scr_doubleaxis.gnuplot.

To plot, just run
$gnuplot scr_doubleaxis.gnuplot

The script is as follows.
继续阅读“Gnuplot Examples (1): Plotting With Double-yaxis”

Plot histograms in python with matplotlib

Suppose we have a file theta.dat which has 1000 lines and each line has a angle value. Its first 10 lines are as follows.


How to plot a histogram figure in python with matplotlib with the file theta.dat?

We put this file in the home directory, thus the position is ~/theta.dat.
Then , we plot in Enthought Canopy Graphical Environment! One can download and install it in Software Manager. If we open it, the window looks like this.


继续阅读“Plot histograms in python with matplotlib”

Linux下使用Keil MDK 开发TM4C123G LaunchPad

Using Keil MDK develop TM4C123G LaunchPad in LinuxMint

Linux下有原生的Code Composer Studio (CCS)可以开发德州仪器的TM4C123G LaunchPad,用起来也很方便。但是我自己在edx上面上了一门课程叫做 “Embedded System –Shape the World”。课程用的是Keil集成开发环境。然而Keil没有Linux的版本,在上课的时候我是用Virtual Box 虚拟了一个Windows XP完成了课程。课程结束之后我参考网络上一些博文结合自己的经验,实现了利用wine安装keil,并成功编译代码,烧写到LaunchPad中。

继续阅读“Linux下使用Keil MDK 开发TM4C123G LaunchPad”


One solution of “Package pdftex.def Error: File ‘eps-converted-to.pdf’ not found

The problem:
In Textstudio, when I compile a  tex file including a .eps file, I meet  a error like this:
Error:  ! Package pdftex.def Error: File `P_ba_at_t-eps-converted-to.pdf’ not found.
Here is one solution I found from web. MichaelChirico answered this question. The answer is as follows.