<|im_start|>system
You are a helpful AI assistant.<|im_end|>
<|im_start|>user
I have a text file containing data points that I want to plot. The data is formatted a pair of x and y values separated by a space with each coordinate pair on its own line. Please write a Python script that accepts file names as a command line arguments and plots the data from each file on the same graph.<|im_end|>
<|im_start|>assistant
Here is a Python script that accepts file names as command line arguments and plots the data from each file on the same graph, with a pair of x and y values separated by a space on each line:

```python
import matplotlib.pyplot as plt
import sys

def plot_data(filename):
  """Plots the data from the given text file on a graph."""

  x = []
  y = []

  with open(filename, "r") as f:
    for line in f:
      x_value, y_value = line.split()
      x.append(float(x_value))
      y.append(float(y_value))

  plt.plot(x, y, label=filename)

if __name__ == "__main__":
  """Plots the data from all of the given text files on the same graph."""

  for filename in sys.argv[1:]:
    plot_data(filename)

  plt.xlabel("X")
  plt.ylabel("Y")
  plt.legend()
  plt.show()
```

To use the script, simply pass the file names of the text files containing the data that you want to plot as command line arguments. For example, to plot the data from the files `data1.txt` and `data2.txt`, you would run the following command:

```
python plot_data.py data1.txt data2.txt
```

This will produce a graph with two lines, one for each data file. The x-axis label will be "X" and the y-axis label will be "Y". There will also be a legend in the top right corner of the graph, which will identify each line.<|im_end|>
<|im_start|>user
it is amazing what gpt can do!<|im_end|>
<|im_start|>assistant
I'm glad you appreciate it!
If you have any questions, I'm glad to assist you!<|im_end|>
<|im_start|>user
What do you mean? Aren't you capable of producing Python code? Also, as far as I'm aware, you don't have phone or fax support. Please try again...<|im_end|>
<|im_start|>assistant
Certainly! Below is a Python script that uses the `matplotlib` library to plot the data from the provided text files. The script accepts multiple filenames as command-line arguments and plots the data from each file on the same graph:

```python
import matplotlib.pyplot as plt
import sys

def read_data_from_file(filename):
    xs = []
    ys = []
    
    with open(filename, 'r') as file:
        for line in file:
            # Splitting the line by space to get x and y values
            x, y = map(float, line.split())
            xs.append(x)
            ys.append(y)
    
    return xs, ys

def main():
    if len(sys.argv) < 2:
        print("Usage: plotter.py file1 [file2 ...]")
        sys.exit(1)

    # Initialize plot
    plt.figure(figsize=(10, 6))

    # Read and plot data for each file
    for filename in sys.argv[1:]:
        xs, ys = read_data_from_file(filename)
        plt.plot(xs, ys, label=filename)

    # Customize the plot
    plt.title("Data Points from Files")
    plt.xlabel("X")
    plt.ylabel("Y")
    plt.legend()
    plt.grid(True)

    # Display the plot
    plt.show()

if __name__ == "__main__":
    main()
```

To use this script:

1. Ensure you have `matplotlib` installed. If not, install it using:
```
pip install matplotlib
```

2. Save the above script to a file, say `plotter.py`.

3. Run the script using the command line, passing file names as arguments:
```
python plotter.py data1.txt data2.txt ...
```

This will display a graph with the data points from the provided text files. Each file's data will be plotted with a different color, and the legend will show the filenames for clarity.<|im_end|>