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From |
Ulrich Kohler <kohler@wzb.eu> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Simple questions regarding time series data |

Date |
Fri, 17 Jul 2009 09:09:42 +0200 |

<> Others might be better prepared for answering your question 1. Meanwhile I have answers to the others: Am Freitag, den 17.07.2009, 10:17 +0800 schrieb Shruthi JAYARAM: > I have a few very simple questions regarding time series data manipulation > - I'm relatively new to STATA (was using R before) and couldn't locate the > answers in the help manual. ... > 2. Is it possible to concatenate strings and numbers into a larger string? > For example, I have a variable y and I want to get the output "The > forecasted GDP for 2009 is y". Can I write a command that intuitively > carries out this: gen outputstring = paste("The forecast GDP for 2009 is", > y) . gen outputstring = "The forcast GDP for 2009 is " + string(y) see -help operators- and -help string functions-. > 3. If I have a time variable x that runs from 1990m1 to 1990m12, how do I > extract the first observation? In R, variables are arrays or matrices, > allowing you to specify the particular observation you would need, such as > x[1] for the first observation of x. What is the equivalent in STATA? It is just the same: . display x[1] displays the frist value in variable x. You can also put expressions inside the brackets: . display x[int(_N/2)+1)] See -help exp- for what Stata (not: STATA) means by "expression". > 4. Finally, is it possible to invoke the system command line from within > STATA to run an outside program during the STATA proceses? See . help shell Hope this helps Uli -- kohler@wzb.eu 030 25491-361 * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**RE: st: Simple questions regarding time series data***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**AW: st: Simple questions regarding time series data***From:*"Martin Weiss" <martin.weiss1@gmx.de>

**References**:**st: Simple questions regarding time series data***From:*Shruthi JAYARAM <Shruthi_JAYARAM@mti.gov.sg>

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