If you append a (4000, 0) entry at the end of your data, your line will be expanded.
Placing this after you read your data should do the trick:
```python
data = np.concatenate((data, [[0, 4000]]))
```
I have attached code that I wrote to plot Infrared spectra. The x axis of the plot (attached) runs from 400 to 4000, which is the range of the infrared portion of the electromagnetic spectrum. The spectrum of the sample runs from 400 to 2800. My question is how can I expand the data plot from 2800 to 4000 (the intensity is 0.0 in that range)? Of course this is not the case for each spectrum The only thing I've found via Google is https://stackoverflow.com/questions/47190853/extend-baseline-of-stem-plot- in-matplotlib-to-axis-limits. I appreciate your assistance. Thanks in advance. Stephen P. Molnar, Ph.D. Life is a fuzzy set www.molecular-modeling.net Stochastic and Multivariate (614)312-7528 (c) Skype: smolnar1
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