Stata cond function

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August undefined, 2024

WebThe cond() function yields one of two results, depending on whether its ﬁrst ar-gument is nonzero (true) or zero (false). See Kantor and Cox (2005) for a tutorial if desired. The … WebUseful 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.

generation a new variable using -cond()- function - Statalist

WebThese are missing values. For example, the value of rep78 for the AMC Spirit is missing. Stata treats a missing value as positive infinity, the highest number possible. So, when we said list if rep78 >= 4, Stata included the observations where rep78 was ‘. ' as well. If we wanted to include just the valid (non-missing) observations that are ... WebRemarks and examples stata.com The condition number of a matrix A is cond = norm(A, p) norm(A 1, p) These functions return missing when A is singular. Values near 1 indicate … spectrum ookla

cond() function - Statalist

WebJun 22, 2024 · Otherwise your new variable could be max (,) or min (,) of the two variables as each function ignores missings when possible. cond (!missing (more_children), more_children, more_children_pregnant) is a way to do it with cond () but max (more_children, more_children_pregnant) is in my view better. 1 like William Lisowski Join … Webgen z = cond(missing(x, y), ., (x > y)) That way it's explicit what happens with missings. And it's quite easy to put in words: If there are missings on any x or y, return missing; otherwise evaluate (x > y). Yet more variables can be packed into the -missing()-: gen z = cond(missing(x, y, a, b), ., (x > y) & (a == b)) WebThe equivalent of Excel's IF () in Stata is function cond (). Such as in the following example: generate dollar_price=cond (foreign, price*1.33, price) which generates a dollar_price … spectrum online tv online

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Stata tip 48: Discrete uses for uniform() - SAGE Journals

WebWhere Stata only allows one to work with one data set at a time, multiple data sets can be loaded into the R environment simultaneously, and hence must be specified with each function call. Note: Rdoes not have an equivalent to Stata’s `codebook` command. Summarize Data Estimate Models, 1/2 OLS Setup browse // open browser for loaded data Webconducted, one for each cond() function. The irecode() function in the third example, however, is fed one draw from runiform(). The function compares this one draw with the cutpoints provided by the user and assigns group membership accordingly. References Buis, M. L. 2007. Stata tip 48: Discrete uses for uniform(). Stata Journal 7: 434–435. spectrum opelika al office hoursWebStata has two built-in variables called _n and _N. _n is Stata notation for the current observation number. _n is 1 in the first observation, 2 in the second, 3 in the third, and so … spectrum ookla speed test oxford ma

"Webreal scalar cond(numeric matrix A, real scalar p) Remarks and examples stata.com The condition number of a matrix A is cond = norm(A, p) norm(A 1, p) These functions return missing when A is singular. Values near 1 indicate that the matrix is well conditioned, and … " - Stata cond function

Stata cond function

WebMay 27, 2024 · Skip to the content following this video. If a gen command has an if condition, the resulting variable will (and must) still exist for all observations. However it will be assigned a missing value for observations where the if condition is not true. If a replace command has an if condition, observations where the if condition is not true will be left … WebMay 18, 2016 · In this technical report, I show how to use asm – a Stata program to construct J-K overlapping momentum portfolios. Also, I outline details of the primary functions/ features of the program.

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WebMar 26, 2024 · 1 The following works for me: sysuse auto, clear generate price2 = price + 5345 egen a_price = mean (price) if foreign == 0 egen b_price = mean (price2) if foreign == 1 replace a_price = b_price if foreign == 1 Share Follow answered Mar 25, 2024 at 14:15 user8682794 Add a comment 0 This should work WebNov 12, 2024 · cond () function. Hi all! I have the following dilemma. I would like to create variables such that: if a local takes on a certain name (i.e. price) the variable is created, …

WebSep 4, 2024 · 1 Answer Sorted by: 2 You need to use 'or' ( ) instead of 'and' ( & ): sysuse auto, clear generate x = . replace x = 5 if price == 4099 replace x = 5 if price == 4749 generate y … WebSep 4, 2024 · 1 Answer Sorted by: 2 You need to use 'or' ( ) instead of 'and' ( & ): sysuse auto, clear generate x = . replace x = 5 if price == 4099 replace x = 5 if price == 4749 generate y = 5 if price == 4099 price == 4749 Alternatively you can use the inlist () function: generate z = 5 if inlist (price, 4099, 4749) Results:

WebJan 6, 2024 · Stata orders the data according to varlist1 and varlist2, but the stata_cmd only acts upon the values in varlist1. This is a handy way to make sure that your ordering involves multiple variables, but Stata will only perform the command on the first set of variables. REMOVE REPEATED DEATHS FROM PATIENT 8 WebMar 14, 2024 · Given an expression that can be true or false when evaluated, Stata will return 1 when the expression is true and 0 when it is false. So, with such a generate statement, Stata automatically loops over observations, returning 1 for observations for which the expression is true and 0 for the others.

WebNov 19, 2016 · cond () is strictly a function, not a command. More crucially, you don't give a data example or tell us what code you tried, so it remains unclear what the question is. …

WebJun 25, 2024 · There are many different functions in Stata that you can use to generate new variables or perform calculations. For example, the cond () function which we cover in this post, or the sqrt () function which you can use to instantly calculate the square root of all the observations in a variable. spectrum online tv guideWebStata has two built-in variables called _n and _N. _n is Stata notation for the current observation number. _n is 1 in the first observation, 2 in the second, 3 in the third, and so on. _N is Stata notation for the total number of observations. Let’s see how _n and _N work. spectrum operating hoursWebThe same result can be achieved even more concisely, given that in Stata a true condition is evaluated as 1 and a false condition as 0 (Cox 2005). uniform() < .6is ... Kantor, D., and N. J. Cox. 2005. Depending on conditions: A tutorial on the cond() function. Stata Journal 5: 413{420. Title: The Stata Journal Author: Stata Press Subject: Stata ... spectrum opal art glass spectrum operationsWebNov 16, 2024 · It is just tempting to look at a cond() solution, because cond() is a good general do-it-yourself function in which you spell out what you want given two possible … spectrum operations apprentice courseWebUseful 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 … spectrum ookla speed testWebPlotting the graph of the cube function x3 = y underlines that it is single-valued and deﬁned for arguments everywhere on the real line. So also is the inverse or cube root function x = y1/3 = 3 √ y. In Stata, you can see a graph of the cube function by typing, say, twoway function x^3, range(-5 5) (ﬁgure 1). To see a graph of its inverse, spectrum operations apprenticeship course