Zhaohua Tian's Web

Python #PlotRecently I struggled to choose the right way to write python. I’m not willing to use bloatware such as spyder to write. Since I want to feel very free when I want to start to write. This could be done via text eidter such as sublime text or vs code. However, my another demand is to write the note and code in the same file. This demand could be best solved via jupyter notebook when you want to solve something and show how you solve it. I have tested the way of animating the plot by u ...

Python #Tools目的自己目前在用VNote写笔记，这个笔记软件非常便于我们管理本地Markdown文件，具体的用法后续会单独介绍，今天我要记录的是，怎么用python来复制特定的文件。 我的Hexo博客文件夹是Onedrive同步的，单独的文件夹。博客笔记要更新或者修改，我一般不直接对Hexo的文件操作，而是有一个单独的笔记本文件夹，觉得可以分享到网络上的笔记，我会复制到Hexo文件夹下的_post文件目录。这样的缺点是有时候会不小心直接在Hexo文件夹下改，而原来的本地文件夹的文件没有修改，造成版本混乱。而且手动复制也很麻烦。有没有更加自动化的操作呢? 用过Linux的都知道，Linux下有通过*来模糊匹配的方法，并且有cp命令来进行文件的复制。windows我不太清楚，打算通过python来实现，也算是一个学习python的机会。这是本片笔记的目的 方法通过网络上查询，知道了可以通过os，shutil包来操作文件，具体的 os.listdir() 可以展示某一个文件夹下的文件以及文件夹。缺点是只能展示一级文件夹。 os.walk() 可以遍历某一个文件夹下的所有文件以及 ...

Inkscape #DrawInkscape基础操作 F1 拾取器(Selector)按下Ctrl来进行水平或竖直移动再次在矩形上单击，控制器会发生变化按下Ctrl以保持旋转的角度为15度的整数倍按下Ctrl以保持扭曲(倾斜)的角度为15度的整数倍。 群组选择一个或多个对象后，按Ctrl+G可以将它们组合在一起选中一个或多个群组后，按Ctrl+U可以解散组合 填充与轮廓- Shift+Ctrl+W 填充和笔刷-shift+Ctrl+F设置：颜色+透明度+填充+轮廓 再制、对齐和分布再制duplicating-(Ctrl+D）对齐对话框-(Ctrl+Shift+A) 叠放次序Z-order置顶-Home键置底-End键上升-PgUp键下降-PgDn键如果没有选择任何对象，按Tab将会选择最底层的对象Shift+Tab的选择方向则相反，从最顶层开始，往底层逐次选择 选择下面的对象并移动Alt+click–实现从顶层到底层的循环选择 文本工具切换到文本工具 -F8文本和字体对话框-Shift+Ctrl+T

MATLAB #PlotData Visualization Via MATLAB (3 dimensional data)The three dimensinal data are composed of matrix. Its data also has the position matrix. (x,y,z). We can plot the isosurface, contourlines, slice plots etc for this kind of data. 3d Contour Surface PlotsWe should extract the contour data via the function isosurface. Though I have completed the figure, I can’t understand the reason. I will give issulation later. 12345678910111213141516171819202122232425262728293031323334353637383940 ...

Python #PlotRecently I am interested in the data visualization and I have try different plots. Previously in my research work I ploted a 3d contour figure via MATLAB. Since the frequently used Python package Matplotlib has poor support on this kind of 3d data visualization. I also tried the Mayavi package before and I didn’t learn it well. After reading a lot of examples I begin to control the skill of using Mayavi. I try to replot the original plots via python. Here is the process. We firs ...

This figure is the Fig2 of my research work and I let it rotated. This time I try o plot the 3d animated distribution via python package Mayavi Different from the animated operation via using the Matplotlib, This 3d data visualization is more powerful. I only upload the figure this time and I will write a complete note latterly. The data are calculated via parameter sweep and store with txt format. We need load it 123456789101112# %% Load the datadis_tri = np.loadtxt('../3D_Animation/BigRangeSw ...

SublimeSublime Text 3 的安装及使用目前的编辑器非常多，比如Sublime，Atom, Vs Code等，都各有优劣。目前来看VS Code应该是份额最高、功能最全的。即使这样，也还有其不如人意的地方，比如一般开启比较慢。Sublime Text 3 是我大三时候经朋友推荐开始使用的，一直用到了现在博三（2019 12 28），用这款编辑器写过MATLAB, Python, Bash脚本, Markdown, Latex等，对其特性还是比较了解的，本片笔记将会从安装开始，详细写下Sublime Text 3 的安装及配置以及一些插件的使用。 软件安装Windows 平台直接去Sublime Text 3 官网下载对应的版本，最好选Windows的exe版本而不是portable version。下载好后一路点击安装确定就好了。 Linux 平台官网也有安装教程，以Ubuntu为例 Install the GPG key: 1wget -qO - https://download.sublimetext.com/sublimehq-pub.gpg | sudo apt ...

Python #PlotAll the python study code can be found in my own repository. As a study of Python data visualization, I plot a 3D follower and let it rotated horizontally. The packages I used are 1234567import subprocessimport numpy as npfrom matplotlib import pyplot as pltfrom matplotlib import animationfrom mpl_toolkits.mplot3d import Axes3Dfrom matplotlib import cmfrom matplotlib.ticker import LinearLocator The follower is defined via the following data 12345678910[x, t] = np.meshgrid(np.array(ra ...