![max rows stata 13 max rows stata 13](https://i.stack.imgur.com/8VjMe.png)
You can see a full accounting of all functions you can use in this setting inĭummy variables (also known as indicator variables or binary variables) are variables which take on two values, 0 and 1 9.
![max rows stata 13 max rows stata 13](https://datacarpentry.org/stata-economics/img/interface.png)
For example, a common transformation is to take the log of any dollar amount variable, in our case price. In addition to direct arithmetic equations, we can use a number of functions to perform calculations.
![max rows stata 13 max rows stata 13](https://miro.medium.com/max/10000/1*qRQOYNtfKrjyBOZRqblZ6w.png)
We should probably add a variable label to our new weight. If you check the arithmetic, you’ll see that we’ve got the right answer. The list command can be used to output some data, let’s use it here to output the first 5 rows’ weight and weight2 variables: The syntax for generate is straightforward, Let’s create a second weight variable measured in tons. Variable name type format label variable label For example, if we look at the variable label for weight, we see that it is measured in pounds. The generate command can be used to create new variables which are functions of existing variables. We saw the usage of this earlier when discussing loading subsets of the data. summ weight if foreign = 1 | (mpg > 20 & headroom < 10) So we could summarize a variable only when some other variables have some values. You can also use parentheses in combination with & and \(|\) to create more logical statements (e.g. We can assign values of true and false to any such conditional statements, which use the following set of conditional operators: Remembering back to middle school math classes that \(\gt\) means “greater than”, clearly the first statement is true and the second statement is false. The if requires defining a conditional statement. +-Īs you can see, the second call to summarize thinks there are only 10 rows of data. For example, if we wanted to summarize the first 10 rows for a variable, we could run: Using in, we pass a number list which consists of a lower bound, a /, and an upper bound. However, we can restrict this.īoth are optional (obviously), but you can include them if desired.
#MAX ROWS STATA 13 HOW TO#
We’ll discuss operating on subsets of the data in far more detail a bit later, but first we’ll discuss how to modify the basic command syntax to run a command only on some rows of data.īy default, this will use all rows of the data it can.
![max rows stata 13 max rows stata 13](https://miro.medium.com/max/1838/1*Oc84nwIfkSxfJ80xOYUNgA.png)