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open_csv

Syntax

open_csv("out_filename","col_1",...,"col_n")

Parameters

out_filename
The filename of the CSV to be produced, with its extension, surrounded by quotes.
col_1, ..., col_n
A comma-separate list of header names (in quotes!) to place at the start of the file. Each header name must be a non-empty string of alphanumeric and underscore characters.

Description

Opens an output CSV file, allowing for print_csv to write values to it.

It is a run-time error to call open_csv() more than once on the same file.

Examples

The following prints the value of the likes_baseball agent variable for every ordinary agent ID defined in a file called agents.txt to out.txt.

agents.txt

ID,likes_baseball
123,0
456,1
789,1
999,0

main.fred

simulation {
    locations = none
    default_model = none
    start_date = 2020-Jan-01
    end_date = 2020-Jan-01
}

variables {
    agent numeric likes_baseball
}

condition TEST {
    start_state = Agent_Start
    meta_start_state = Meta_Start

    state Meta_Start {
        read_agent_file("agents.txt")
        open_csv("out.txt","id","likes_baseball")
        wait()
        default()
    }

    state Agent_Start {
        print_csv("out.txt",id,likes_baseball)
        wait()
        default()
    }
}

See Also