#COLLAPSE STATA SOFTWARE#
This software is also available via IUanyWare. To see which of IU's research supercomputers have Stata installed, log into HPC everywhere, select HPC Applications, and then enter stata into the "Software Search" field.If the data is already in wide form this is just a matter of dropping the level one variables. For the ACS that would be a data set of households, with no individual-level variables.
#COLLAPSE STATA WINDOWS#
#COLLAPSE STATA PLUS#
Its capabilities include a broad range of statistical analyses, plus data management, graphics, simulations, and custom programming. These are useful, for example, if you want to create a cross-section data set from annual data, with. It differs only in offering four additional 'aggregation' operators: first, last, firstnm, and lastnm. © W.Stata is a general-purpose statistical analysis package created and maintained by StataCorp LP. collapse2 is an extension of Stata's built-in collapse command, which converts the data in memory into a dataset of means, sums, medians, etc. Fortunately, Stata develops labels for each variable providing details on which statistic occurred from a collapse. For further information see help contract. Using multiple statistical outcomes from one collapse can make keeping track of statistic output somewhat difficult by looking at the variable name alone.
Note that by default missing values are treated as a value in its own right, but this, just as a number of other features, can be changed with the help of options. Will create a dataset that contains all occupation-gender combinations in your original data and the frequency with which each combination occurs. Represents the frequency of each combination. ContractĬontract creates a new dataset consisting of all combinations of a number of variables plus a new variable that For more information, please check the Official Stata website.In this Introduction to Stata video, you will learn.
Using outreg2 to report regression output, descriptive statistics, frequencies and basic crosstabulations. Stata is a statistical software that is used for estimating econometrics models. Rather, use the egen command described in the section about generate/replace. Predicted probabilities and marginal effects after (ordered) logit/probit using margins in Stata. Note that you do not have to collapse data if you just want to add the mean of variable (possibly for subgroups) to your current dataset.
See help collapse to find out more about other options. The new data set will contain one row for each occupation, and the variable "income" will give the mean of income of each occupation. So, the simplest version of the command goes like this: This is much liking creating statistics for groups of cases, but by collapsing your data a new data set is created that contains these statistics and can be put to further use.īy default, the mean of one (or several) variables is created. Multiple Imputation: Analysis and Pooling StepsĬollapsing your data means to combine several cases into single lines.Note that we won’t necessarily see a benefit for small(ish) datasets like the one. The community-contributed gtools suite can help a lot with speedups and, fortunately, has a faster version of collapse, called gcollapse. Confidence Intervals with ci and centile With big datasets, Stata can be slow compared to other languages, though they do seem to be trying to change that a bit.Changing the Look of Lines, Symbols etc.
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