Let’s take a look at an example. I’m currently looking at a longitudinal data set filled with economic data on all 67 counties in Alabama. The time frame is in decades, from 1960 to 2000. Five time periods by 67 counties give me a total of 335 observations. If you haven't ever used text to columns, it allows you to take one column of data and separate it into multiple columns using delimiters that you provide. One time this is helpful is when converting data from other formats. If you're learning Stata, you may wonder how you can gain this useful functionality. May 20, 2008 · This document is designed to help you conduct event studies using Stata. We assume that you already have data with a date variable, which we call "date", and a company identifier, which we have called "company_id". If you need to prepare your data or want to try out the commands with our sample data, go to data preparation page. If you haven't ever used text to columns, it allows you to take one column of data and separate it into multiple columns using delimiters that you provide. One time this is helpful is when converting data from other formats. If you're learning Stata, you may wonder how you can gain this useful functionality. For Stata, red color means error, in this case it was expecting numeric variables but some values have letters attached so Stata reads them as string characters. To convert those string characters into numeric you need to use destring command (type help destring for details) as follows. In a comment to the previous post destring complication: negative numbers, Nick Cox pointed out “the most important advise” in using destring: “never destring, replace unless you are absolutely sure that you are right or are willing to do things again if you made the wrong decision. 例）foreach x in ID Year Date { replace `x'=0 if `x'==. replace val99 = 1 if val0=="`x'" } 例）foreach i in 2 5 17 { replace val`i'=0 if val`i'==. 3) is not a Stata download site (has no stata.toc file). how can i download this commant, please help anyway, i am running the fixed model for data panel, and trying to use collin to know the vif, what should be the value for vif suitable for checking collin ? This paper discusses the use of Stata for the analysis of time series and panel data. The evolution of time-series capabilities in Stata is reviewed. Facilities for data management, graphics, and econometric analysis from both official Stata and the user community are discussed. “Keep if Level == “X”” makes the STATA to further drop data for all levels except the “Level X” where X can be any whole number between 1 to 7, depending on the level of our choice. “destring, replace” is used to destring all the data. dates and then combining them once more using Stata functions for both. At present, oﬃcial Stata lacks facilities for handling run-together dates as such, but auser-written program may be accessed in an up-to-date Stata1 by typing ssc describe todate. 1ssc wasadded to Stata 7.0 on 14 November 2001. If necessary, update your Stata (see ... surveybe timestamp variables are recorded as 19 character long strings in the format dd/mm/yyyy hh:mm:ss, and can be converted into STATA date/time variables (STATA Internal Format, SIF) using the following STATA commands: To create date only variables: gen double date=date(YOURTIMESTRING, "DMYhms") format date %td // formats the variable in Human Readable Form (HRF) To create date time ... Stata provides you with a handy variable called _merge that identifies if observations matched (3), were only in the master file (1) or only in the using file (2). list if _merge==2 list if _merge!=3 Use your knowledge to get rid of _merge. Stata won't let you merge another dataset if _merge is already there. If you haven't ever used text to columns, it allows you to take one column of data and separate it into multiple columns using delimiters that you provide. One time this is helpful is when converting data from other formats. If you're learning Stata, you may wonder how you can gain this useful functionality. Thanks for A2A. From your description it seems that your data looks like the following May be instead of “value1960”, “value1990” your variable names are “1960”, “1990” etc. Jan 31, 2011 · Hello all! I have a data multi-variable data set that I would like to use with STATA. Two of my variables, date and time, are causing me a bit of trouble as they show up as "strings" when I import them into STATA. I have then "formatted" them within STATA but the new time variable happens to include the year "1960" on all entries. If you sort the data by date, then the lagged variable x can be obtained by typing . gen xlag1= x[_n-1] Of course you can use as many lags as you want. . gen xlag2=x[_n-2] Likewise, you can lead the date by using _n+1, _n+2. If you are a serious user of time-series data, then it would be better served by using time series operators. Jul 27, 2014 · destring stata string numeric nonnumeric: ... 比如有的数据中有逗号，导致转换失败。可以用destring date, replace ignore(",")来忽略逗号。 ... Date() function only recognizes year as four digits for one century, adding 2008 forces Stata to consider the change in centuries. For more details type help date . "Datevar1" should have the same structure as "date1". Sep 08, 2009 · There is an easy way to change commas to decimals and vice versa: set dp comma. or . set dp period. It can also be changed permanently by adding the option , permanently.. In order to set a limit for the number of decimal places, one simply has to set the format. Date() function only recognizes year as four digits for one century, adding 2008 forces Stata to consider the change in centuries. For more details type help date . "Datevar1" should have the same structure as "date1". 2016-03-06 1 Introduction to Macro and Loop in Stata SOC 561 Programming for the Social Sciences Hyungjun Suh Mar. 7. 2016 2 Overview Macros (local and global macros) 2016-03-06 1 Introduction to Macro and Loop in Stata SOC 561 Programming for the Social Sciences Hyungjun Suh Mar. 7. 2016 2 Overview Macros (local and global macros) Jan 31, 2011 · Hello all! I have a data multi-variable data set that I would like to use with STATA. Two of my variables, date and time, are causing me a bit of trouble as they show up as "strings" when I import them into STATA. I have then "formatted" them within STATA but the new time variable happens to include the year "1960" on all entries. Destring destring applies destring to the new string variables, replacing the variables initially created as strings by numeric variables where possible. See [D] destring. ignore(), force, float, percent; see [D] destring. Remarks and examples stata.com handles dates and times. Basically, Stata treats each time period as an integer. The integer records the number of time units (whatever you define them to be) that have passed from an agreed-upon base, which for Stata is 1960. For example, for 100 quarterly data ions observatthat start in 1960 we could generate Stata dates using . set obs 100 ... Useful Stata Commands (for Stata versions 13, 14, & 15) Kenneth L. Simons – This document is updated continually. For the latest version, open it from the course disk space. – This document briefly summarizes Stata commands useful in ECON-4570 Econometrics and ECON-6570 Advanced Econometrics. to Stata 1/12 Michele Claibourn, StatLab ... Percentage of rst-time, full-time, degree-seeking ... destring : convert string variables to numeric By the way, Stata _10_ also offers full support for date-times. I was thinking: why isn't Jorge using proper date-times -- and guessing that it was because he is using an outdated version of Stata. But date-time support is also available to him in Stata 10, so the difference is irrelevant here. First I used Copy+Paste > transposeto change the rows and columns. Then I used the Excel formula =”Y”&TEXT(C1;”yyyymmdd”)to change the dates for Stata. Finally I copy+pasted as valuesto get rid of the Excel formulas. The data now looks as follows: Jan 31, 2011 · Hello all! I have a data multi-variable data set that I would like to use with STATA. Two of my variables, date and time, are causing me a bit of trouble as they show up as "strings" when I import them into STATA. I have then "formatted" them within STATA but the new time variable happens to include the year "1960" on all entries. (1) Split string dates into day and time (2) Date/time; input as strings are converted to elasped time (numbers of milliseconds from a datum). (3) The minimum and maximum dates are obtained with the summarize command and saved in local macros. (4) The range is calculated and saved in a local macro. A second method of achieving the same result is the command destring. Let’s try using the destring command and see how it works. The first line of syntax loads the dataset again, so that we are starting with a dataset containing only string variables again. The second line of syntax runs the destring command. Hello, I have a time series dataset with the following date variable format: 2000M09 2000M10 2000M11 And so on until 2015M09. This variable is a string variable, which I would like to destring such that it can act as the date variable. This paper discusses the use of Stata for the analysis of time series and panel data. The evolution of time-series capabilities in Stata is reviewed. Facilities for data management, graphics, and econometric analysis from both official Stata and the user community are discussed. Stata's tsset command is used to declare data in memory as time series. After setting the data as time-series, you can use many of Stata's time-series operators such as tsline (to draw a time-series plot), L. and F. (for lag and lead) and so on.