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'''Scalars''' are a fundamental data type in Stata, like [[Stata/Matrices|matrices]]. |
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| == Definition == | == Usage == |
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| To define a scalar, use the `scalar define` command. The `define` keyword can be left off. | Scalars are singular values. To declare a scalar, try: |
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| Scalar variables are accessed by their name. | Note the `define` subcommand can be omitted. |
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| {{{ generate double score = i * j }}} |
String scalars can hold arbitrarily long strings, and can also hold binary data. To list all defined scalars, try `scalar list _all` or `scalar dir _all`. To clear all scalars, try `scalar drop _all`. |
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| === String Scalars === | === Anonymous Scalars === |
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| String scalars can hold arbitrarily long strings, and can also hold binary data. ---- == Usage == To examine a scalar variable, try: |
To obtain a random, temporary name for a scalar that will never collide with an existing variable or scalar defined, try: |
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| scalar dir i }}} Use `scalar dir _all` (or `scalar list _all`) to list the contents of all scalar variables. To delete a scalar variable, try: {{{ scalar drop i }}} Use `scalar drop _all` to delete all scalar variables. To obtain a random, temporary name for a scalar that cannot collide with any variables or scalars defined in a dataset, try: {{{ tempname n1 n2 count if cohort==1 scalar `n1' = r(N) count if cohort==2 scalar `n2' = r(N) |
tempname myN scalar `myN' = r(N) |
Stata Scalars
Scalars are a fundamental data type in Stata, like matrices.
Contents
Usage
Scalars are singular values.
To declare a scalar, try:
scalar define i = 1 scalar j = 2 scalar k = "Hello, world!"
Note the define subcommand can be omitted.
String scalars can hold arbitrarily long strings, and can also hold binary data.
To list all defined scalars, try scalar list _all or scalar dir _all.
To clear all scalars, try scalar drop _all.
Anonymous Scalars
To obtain a random, temporary name for a scalar that will never collide with an existing variable or scalar defined, try:
tempname myN scalar `myN' = r(N)