You can use the cat command (see man cat for more information) to concatenate the text files. If you want to create a new file cat [FILE1] [FILE2]. You have already redirected the output of file1 and file2 to the new file file3. With this command cat file1 file2 > file3 | sort, sort after pipe. How to concatenate two files into a new file using Python – To merge multiple files in a new file you can simply read files and write them to a.

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When you have two data files, you may want to combine them by stacking them one on top of the other referred to as concatenating files. Below we have a file called dads and a file containing moms. Below we have stacked concatenated these files creating a file we called momdad. These examples will show how to concatenate files in SAS.

It then combines them concatenates them creating a file called dadmom. The output from this program shows that the files were combined properly. The dads and moms are stacked together in one file.

But, there is a little problem. When we combine the two files together the momdad variable will tell us who concaetnare moms and dads are.

Concatenating data files in SAS | SAS Learning Modules

Here we get a more desirable result, because we can tell the dads from the moms by looking at the variable momdad. This required some thinking ahead because we had to put momdad in both the dads data file and the moms data file before we merged the data files. Concatenxre above examples cover situations where there are no complications. However, look out for the following problems. For example, income is called dadinc and in the dads file tile called mominc in the moms file, as shown below.


The most obvious solution is to choose appropriate variable names for the original files i. This solution is not always possible concatenxre you might be concatenating files that you did not originally create.

To save space, we omit illustrating this solution.

If solution 1 is not possible, then this problem can be addressed using an if statement in a data step. Another way conctenare can fix this is by using the rename option on the set statement of a data step to rename the variables just before the files are combined. This is illustrated below.

Note that the names for the moms are truncated to be length 3.

How to concatenate two files into a new file using Python

This is because the length for names in the dads file is 3. To fix this, use the length statement in the data step that merges the two files.

This problem is similar to the problem above, except that it has an additional wrinkle, illustrated below. In the dads file there is a variable called fulltime that is coded 1 if the dad is working full time, 0 if he is not. The moms file also has a variable called fulltime that is coded Y is she is working full time, and N if she is not.


Not only are these variables of different types numeric and characterbut they are coded differently as well. Code the variables in the two files in the same way. This is the simplest solution if you are creating the files yourself. We will omit illustrating this solution to save space. You may not have created the original raw data files, so solution 1 may not be possible for you. In that case, you can create a new variable in each file that has the same coding and will be compatible when you merge the files.

How to concatenate two files into a new file using Python?

Below we illustrate this strategy. For the dads file, we make a variable called full that is the same as fulltimeand save the file as dads2dropping fulltime. For the concwtenare, we create full by recoding fulltimeand save the file as moms2also dropping fulltime.