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Research Note: How can we pre-estimate sample size for multi-factorial ANOVA(ANCOVA) designed study? Question: Researchers, especially in the field of experimental psychology are still confused with how to estimate the required sample size of a complex design, for example, 2×2×22\times 2 \times 22×2×2 between-within mixed design ANOVA, or a more complicated one like, 2(between−subjects)×2(between−subjects)×2(within−subjects)×2(within−subjects)2(between-subjects)\times 2(between-subjects) \time ...

Dev Note: Cheats Lists on Virtual Environment Building with conda Problems: If you built virtual environment with conda and pyenv, sometimes configuration files might conflict, thus pip install packages in global environment instead of local one. I just encountered this problem which motivates me to record how I fixed it. Error Status: testing cross-device function of application Git clone from my private repo and created env with conda create -n myenv python=3.11 However, after run pip inst ...

Dev Note: A simple work flow record of processing eye tracking data collected with a psychology experiment (1) Intro I’m taking part in a cognitive psychology experiment involved in eye tracking data. In this experiment, participants are introduced to complete 2 simple tasks: 1) exposure task and 2) evaluation task with equipping eye tracking devices. Ongoing… Aims Although it seems quite complex to meet all demands, there are at least three functions I need to code: Pre-process of raw data ...

Conference record: 3rd Descriptive Science on Data (day 2) Persistent Homogeneity on Financial Market Stocks Configuration spaces of financial market stacks TDA Market -> Topological space Status of market -> Regime RQ: Valance are R how to apply it to configuration space? Definitions rα(t)=log(previous/current)r_{\alpha}(t) = log(previous/current)rα​(t)=log(previous/current) definition of distance: Euclidean distance of (yi−yi−1)1/2(y_i - y_{i-1})^{1/2}(yi​−yi−1​)1/2 Assumption: betti ...

Conference record: 3rd Descriptive Science on Data (day 1) 5-dimension data visualization Big data in Materials science, 5D (3D + t + E) time, energy Topology of Mine tracking history (continous data) 3D rotation + 4D rotation Raw data(4, 1) -> (3, 4)R(1, 4) = (3, 1) data=(xyzw)−>(1,0,0,10,1,0,10,0,1,1)R(x,y,z,w)=(x~y~z~)\mathrm{data} = \begin{pmatrix} \mathrm{x} \\ \mathrm{y} \\ \mathrm{z} \\ \mathrm{w} \\\end{pmatrix} -> \begin{pmatrix} 1, 0 , 0, 1 \\ 0, 1, 0, 1 \\ 0, 0, 1,1 \\ ...

Dev Note: Develop my personal site with Hexo (1) Questions I always forget the prompts of Hexo, although its prompts are really simple! LOL… In using Hexo I have built a personal web blog site by using Hexo, and deployed configuration files to connected to Github page in a really simple way. I might write a blog to summarize how I did it soon…? In addition, I write blogs with Obsidian and Obsidian do powerfully support almost every thing. Editing blog pages Create a directory in source/ ...

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Dev Note: Tips on building environments, venv or conda? Questions It is suffering to build a virtual environment sometime I could like to record two of the most common approach to build virtual environment under Ubuntu (precisely the Linux subsystem built on Windows) The reason why I choose to write this memo is “I ALWAYS forget the prompts, lol” with venv venv is the most recommended way of managing virtual environment since Python 3.5, it is a module within the Python Standard Library, so ...

Dev Note: Tips of developing with WSL Questions Ubuntu running under Windows Subsystem for Linux (WSL) popped up error about inefficient memory in virtual disk I have to expand the memory of virtual disk Source: How to manage WSL disk space | Microsoft Learn Procedure Open Windows Command Prompt with admin privileges and then open the diskpart command 1diskpart Wait for diskpart awake, using Select vdisk to specify the path to disk, but most of the time, the path to VHD (Virtual Hard D ...

Image Formation 2: Geometric Image Formation 1.3