This page contains instructions on how to change the permissions of your files via a common SSH client – Putty. Why would you want to…
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Importing multiple Excel files, each with multiple sheets, into R.
Importing multiple Excel files, each with multiple sheets, into R. Excel is extremely popular as a tool for organizing data and it has fairly easy-to-use…
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Spring 2009, 4:40-6:30pm TTH (CH296) Prof. K.-P. Lin (CH 241G, 725-3931) Office Hours: 3:30-4:30 TTH & by appointment This is a course on applied econometrics dealing…
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Notepad++ is an open-source text editor for Windows. I have to work on different technologies, It’s not possible to install all editors (like Dreamweaver, Visual studio…
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医生在验光的最后程序结束后，往往会开出眼镜处方，让屈光不正的朋友们去眼镜店配眼镜。很多人看着一堆数据觉得高深莫测，其实，眼镜的处方并不难阅读和理解。 一、左右眼的表示： 右眼通常显示在眼镜处方的前面，用英文简写“R”或者“O.D”表示。左眼用英文简写“L”或者“O.S”表示。 二、处方由5个主要部分的数据组成： 球镜度数、柱镜度数、柱镜的轴向、瞳孔距离、以及下加光附加值。 三、球镜是指“近视或者远视的镜片”。用英文简写“S”或者“SPH”表示。球镜用来矫正近视眼或远视眼。如果球镜度数前是负符号（-）显示，即为近视眼；如果球镜度数前是正符号（+），即为远视眼。 四、球镜（近视、远视）的度数通常英文“D”表示，一个“D”等于100度的屈光度。 例如：处方显示“OD S：-1.75D”就是指右眼近视175度。 处方显示“OS S：+2.00D”就是指左眼远视200度。 五、柱镜是指“散光的镜片”。用英文简写“C”或者“CYL”表示。柱镜用来矫正散光眼。如果柱镜度数前是负符号（-）显示，即为近视散光；如果柱镜度数前是正符号（+），即为远视散光。 六、柱镜（散光）的度数通常英文“DC”表示，一个“DC”等于100度的散光。 …
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YouTube added video stabilization tool to new video editor. And its super easy to use: Upload your video go to video editor and click “Stabilize”. It…
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SUNDAY, 17 MAY 2009 • PERMALINK Update: This post was written back in 2009, and much has changed since then. I’ve also written a few subsequent posts…
View More TOP 10 PROGRAMMING FONTSU.S. EPA Policy and Technical Guidance on Transportation Conformity
This page contains policy guidance issued by EPA and/or the U.S. Department of Transportation to assist state and local transportation and air quality agencies implement…
View More U.S. EPA Policy and Technical Guidance on Transportation ConformitySpatial panel data models using Stata
A new command for estimating and forecasting spatial panel data models using Stata is now available: xsmle. xsmle fits fixed or random effects spatial models for balanced…
View More Spatial panel data models using StataWhat is the difference between spatial dependence and spatial heterogeneity?
These terms probably do not have a universally accepted technical definition, but their meanings are reasonably clear: they refer to second order and first order…
View More What is the difference between spatial dependence and spatial heterogeneity?