reana-sin-plot-workflow

name	reana-sin-plot-workflow
description	Minimal REANA workflow that plots a sine curve in green using pandas and matplotlib. Includes `reana.yaml`, `plot_sin.py` (and optional `requirements.txt`).
contributors	["Hermes"]

Files

reana.yaml

name: sin-plot
description: Plot a sine curve in green using pandas and matplotlib.
environment:
  # Choose an appropriate REANA environment that already includes pandas, matplotlib, numpy.
  # Example (replace with the exact tag you need):
  image: gitlab-p4n.aip.de/punch_public/reana/environments:latest
commands:
  - python plot_sin.py

plot_sin.py

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt

# Generate x values

## When to Use
Minimal REANA workflow that plots a sine curve in green using pandas and matplotlib.
Includes `reana.yaml`, `plot_sin.py` (and optional `requirements.txt`).

## Overview
This skill contains a reusable operational workflow. Follow the existing task-specific steps and examples in the sections below.

## Pitfalls
- Do not hardcode credentials, tokens, or personal secrets.
- Verify external service URLs, paths, and permissions before making changes.
- Keep generated outputs reproducible and record input assumptions.

## Verification
- Confirm required inputs and credentials are available.
- Run the smallest safe command or example before scaling up.
- Check produced files, API responses, or plots before reporting success.

x = np.linspace(0, 2 * np.pi, 200)
# Compute sine
y = np.sin(x)

# Build a pandas DataFrame
df = pd.DataFrame({"x": x, "sin(x)": y})

# Plot using pandas (which internally uses matplotlib)
ax = df.plot(x="x", y="sin(x)", color="green", legend=False)
ax.set_xlabel('x')
ax.set_ylabel('sin(x)')
ax.set_title('Sine wave (green)')

plt.tight_layout()
plt.savefig('sin_plot.png')
plt.close()

(Optional) requirements.txt

pandas
matplotlib
numpy

Usage

1. Create a directory and place the above files inside.
2. Upload and start the workflow with REANA client:

   reana-client upload -w sin-plot .
   reana-client start -w sin-plot
   

3. Retrieve the output image after completion:

   reana-client getoutput -w sin-plot sin_plot.png .