#TOSTRING STATA HOW TO#
This is a good example of how to check your work: compare what you got to what you expected, and if they don't match make sure you know why! The prices are still generally lower than you'd see at a car dealership, but that's probably because today's cars are much nicer than 1978 cars.
The code will be:Īdd this line to your do file, run it, and examine the results with: To do so you need to multiply the prices by a conversion factor which is the Consumer Price Index in 2020 divided by the Consumer Price Index in 1978, or about 4. The prices in the auto data set are in 1978 dollars, so it might be useful to convert them to 2020 dollars. It's especially important to use do files when you change your data, so start by creating a do file that loads the auto data set: Usually this is exactly what you'd expect and want. If the expression depends on a missing value at any point, the result is missing. You can explore what functions are available by typing help functions.
Expressions can be as simple as a single number or involve all sorts of complicated functions. Where variable is the name of the variable you want to create or change, and expression is the mathematical expression whose result you want to put in it.
gen creates new variables replace changes the values of existing variables. The primary commands for creating and changing variables are generate (usually abbreviated gen) and replace (which, like other commands that can destroy information, has no abbreviation). This article will teach you the basics of making new variables, modifying existing variables, and creating labels. If you're new to Stata we highly recommend starting from the beginning. This is part six of Introduction to Stata.
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