How to input data in stata 12 how to#
How to input data in stata 12 code#
How to input data in stata 12 download#

The destring command is useful in a sense that it does not convert data to missing observations.

How to input data in stata 12 code#

The following code creates a new variable numvar destring strvar, ignor('#error' '#na' '*') gen( numvar) We can specify these in the ignore option. The above tables shows that there are three non-numeric variables in our dataset. tabulate strvar if missing(real( strvar)) Suppose that the above code comes up with a list of the following non-numeric characters. Suppose that our variable strvar contains non-numeric values tabulate strvar if missing(real( strvar )) We can list all non-numeric characters using the tabulate command and the real() function. *Now destring the two variables destring price, replace ignore(',') 1.2 List all non-numeric characters See the following example: *First create a dummy data In such cases, we can use the ignore(вЂњ,вЂќ) option, which tells Stata that the given character i.e. If there are non-numeric characters in our dataset, destring command will show an error non-numeric characters foundДЇor example, our data might have comma separators, therefore, destring will generate the above error. *Now destring the two variables destring price, replace destring return, replace 1. Here is an example: *First create a dummy data input str15(price return)

With this command, we can either generate a new variable or replace the existing one. The destring command might be the first choice for converting string variables to numeric if we have a limited number of non-numeric characters. LetвЂ™s start with the destring command first. If a numeric variable is stored as a string variable in Stata, we have several ways to convert them to numeric variables.

How to input data in stata 12 how to#

In this post, I show how to convert string variables to numeric in Stata.

The implied cost of capital (ICC) | GLS model | Stata | Gebhardt et al.

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Replace year = year(date(dates, 'Y')) if year =. Replace datenum = date(dates, 'Y') if datenum =. *Replace the missing values for dates that have only year part *Assuming that the first part of the date is the date, second is the month, third is the year. We would then use the replace command with the if condition to fill the missing values using again a matching format. Where the format does not match the code, the newly created variable shall then contain missing values. If you have all these dates in the same column, then you can extract the date or year separately from each format. Gen weekly_date = dofw( dofq(given_date)) Gen quarterly_date = qofd( dofw(given_date)) Gen quarterly_date = qofd( dofm(given_date)) Gen monthly_date = dofm( dofq(given_date)) Gen weekly_date = dofw( dofm(given_date))

Gen monthly_date = dofm( dofw(given_date)) The second column in the following table provides an example of a given format in which the date is already recorded, and the third column presents the code which shall convert the date to the desired frequency. If we already have dates in weekly, monthly, or quarterly frequencies, we can convert them back to daily dates and then toВ other frequencies. The file extension should be changed from doc to do after download.

How to input data in stata 12 download#

To see the codes in action, download this do file and execute. The second column in the following table provides an example of a given format in which the date is already recorded, and the third column presents the code which shall create a daily date. If we already have dates in weekly, monthly, or quarterly frequencies, we can convert them back to daily dates. Gen year = year(daily_date) From other frequencies to daily * Now convert the variable text to Stata dateДЇrom daily to other frequencies From daily to We can do that by using the %tdformat, for example, we can use the code format mydate %td textД®xample using some data * Enter example data Once the date is converted into a Stata readable format, we need to format the date so that the visual display of the date is human-readable. To convert them into a Stata date, the example code is shown in the second column. In the following table, the first column shows different date formats in which the date is already recorded and brought into Stata. Before we can use the Stata time-series or panel-data capabilities, we need to convert the string date to a Stata date. (2001) modelД¬opying data from the internet, CSV files, or other sources into Stata will record the date as a string variable, shown with red color.