Original file (SVG file, nominally 360 × 540 pixels, file size: 51 KB)
 | This is a file from the
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Summary
| Description |
English: Recreated from Figure 6 of
Roberts, Larry. "The Arpanet and computer networks." A history of personal workstations. 1988. 141-172. ```python import matplotlib.pyplot as plt import numpy as np
communications_cost_points = np.array([(60, 0.9), (80, 0.12)]) computing_cost_points = np.array([(62, 10), (77, 0.01)])
communications_years = np.linspace(communications_cost_points[0][0], communications_cost_points[1][0], 100) computing_years = np.linspace(computing_cost_points[0][0], computing_cost_points[1][0], 100)
communications_cost_values = np.logspace(np.log10(communications_cost_points[0][1]), np.log10(communications_cost_points[1][1]),
100)
computing_cost_values = np.logspace(np.log10(computing_cost_points[0][1]), np.log10(computing_cost_points[1][1]),
100)
slope = (np.log10(computing_cost_values[-1]) - np.log10(computing_cost_values[0])) / (computing_years[-1] - computing_years[0]) intercept = np.log10(computing_cost_values[0]) - slope * computing_years[0] extrapolated_computing_years = np.linspace(60, 80, 100) extrapolated_computing_cost_values = 10**(slope * extrapolated_computing_years + intercept)
composite_packet_switching_cost_values = np.interp(extrapolated_computing_years, communications_years, communications_cost_values) + extrapolated_computing_cost_values
fig, ax = plt.subplots(figsize=(4, 6)) ax.plot(communications_years, communications_cost_values, label='Communications Cost Trend') ax.plot(extrapolated_computing_years, extrapolated_computing_cost_values, label='Computing Cost Trend') ax.plot(extrapolated_computing_years, composite_packet_switching_cost_values, label='Composite Packet Switching Cost Trend', linestyle='--') ax.set_yscale ('log')
ax.set_xlim(60, 80) ax.set_ylim(0.01, 10)
ax.set_xlabel('Year of Service') ax.set_ylabel('Cost ($/million bits)') ax.set_title('Cost Trends Over Time') ax.legend()
plt.grid(True, which="both", ls="--")
plt.savefig("Packet-switching cost performance trends.svg") plt.show() ``` |
| Date | |
| Source | Own work |
| Author | Cosmia Nebula |
Licensing
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
|
This media file is uncategorized.
Please help improve this media file by adding it to one or more categories, so it may be associated with related media files (
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Please notify the uploader with {{subst:Please link images|File:Packet-switching cost performance trends, 1960-1980.svg}} ~~~~ |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:15, 1 December 2023 |
| 360 × 540 (51 KB) | Cosmia Nebula | fix |
| 00:13, 1 December 2023 |
 | 360 × 540 (50 KB) | Cosmia Nebula | fx | |
| 00:11, 1 December 2023 |
 | 576 × 432 (1 KB) | Cosmia Nebula | Uploaded while editing "Packet switching" on en.wikipedia.org |
File usage
Metadata
Original file (SVG file, nominally 360 × 540 pixels, file size: 51 KB)
| This is a file from the
Wikimedia Commons. Information from its
description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
English: Recreated from Figure 6 of
Roberts, Larry. "The Arpanet and computer networks." A history of personal workstations. 1988. 141-172. ```python import matplotlib.pyplot as plt import numpy as np
communications_cost_points = np.array([(60, 0.9), (80, 0.12)]) computing_cost_points = np.array([(62, 10), (77, 0.01)])
communications_years = np.linspace(communications_cost_points[0][0], communications_cost_points[1][0], 100) computing_years = np.linspace(computing_cost_points[0][0], computing_cost_points[1][0], 100)
communications_cost_values = np.logspace(np.log10(communications_cost_points[0][1]), np.log10(communications_cost_points[1][1]),
100)
computing_cost_values = np.logspace(np.log10(computing_cost_points[0][1]), np.log10(computing_cost_points[1][1]),
100)
slope = (np.log10(computing_cost_values[-1]) - np.log10(computing_cost_values[0])) / (computing_years[-1] - computing_years[0]) intercept = np.log10(computing_cost_values[0]) - slope * computing_years[0] extrapolated_computing_years = np.linspace(60, 80, 100) extrapolated_computing_cost_values = 10**(slope * extrapolated_computing_years + intercept)
composite_packet_switching_cost_values = np.interp(extrapolated_computing_years, communications_years, communications_cost_values) + extrapolated_computing_cost_values
fig, ax = plt.subplots(figsize=(4, 6)) ax.plot(communications_years, communications_cost_values, label='Communications Cost Trend') ax.plot(extrapolated_computing_years, extrapolated_computing_cost_values, label='Computing Cost Trend') ax.plot(extrapolated_computing_years, composite_packet_switching_cost_values, label='Composite Packet Switching Cost Trend', linestyle='--') ax.set_yscale ('log')
ax.set_xlim(60, 80) ax.set_ylim(0.01, 10)
ax.set_xlabel('Year of Service') ax.set_ylabel('Cost ($/million bits)') ax.set_title('Cost Trends Over Time') ax.legend()
plt.grid(True, which="both", ls="--")
plt.savefig("Packet-switching cost performance trends.svg") plt.show() ``` |
| Date | |
| Source | Own work |
| Author | Cosmia Nebula |
Licensing
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
|
|
This media file is uncategorized.
Please help improve this media file by adding it to one or more categories, so it may be associated with related media files (
how?), and so that it can be more easily found.
Please notify the uploader with {{subst:Please link images|File:Packet-switching cost performance trends, 1960-1980.svg}} ~~~~ |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:15, 1 December 2023 |
| 360 × 540 (51 KB) | Cosmia Nebula | fix |
| 00:13, 1 December 2023 |
| 360 × 540 (50 KB) | Cosmia Nebula | fx | |
| 00:11, 1 December 2023 |
| 576 × 432 (1 KB) | Cosmia Nebula | Uploaded while editing "Packet switching" on en.wikipedia.org |