Combine CSV
MOOSE is able to output vector postprocessor comma separated value (CSV) files. Also, other generated CSV files for input and output from MOOSE are created. Combine CSV is a simple tool to combine CSV files into one file. Combine CSV is able to output the combine CSV file in a bilinear format that may be directly used by MOOSE (e.g., PiecewiseBilinear).
Input files require a specific format for names. The basename is followed by a four digit code representing the timestep number and then ".csv" extension. The time file replaces the four digit code with "time.csv". A simple example of file names is:
basename_pattern_0000.csv basename_pattern_0001.csv basename_pattern_0002.csv basename_pattern_time.csv
Standard Usage
Combine CSV is a command line script, combine_csv.py. To display all command line options with some help descriptions:
combine_csv.py -h
The non-bilinear format of the output single CSV file has timestep number (or time if a "*time.csv" file is provide and -t option is used) as each column's header, if written with -w. Row values are ordered as they are found in each input file. If the "X variable" name is provided after -x then the first column will have these values.
Bilinear Usage
Outputting the CSV file in bilinear format requires command line options -b and -w. Also, usually -t is used where a "*time.csv" file defines what time corresponds to timestep number. A typical command line execution is:
combine_csv.py basename_pattern_ -o out_file -x x_name -y y_name -w -t -b
The bilinear output format transposes a standard output's data. The first column header is also omitted during output.
Error Messages
Error messages are put through Python's exception handling method. Initial errors directly create specific errors from Combine CSV that have messages identifying the error and what went wrong. These are usually produced from wrong command line arguments.