diff options
Diffstat (limited to 'data/2018-11-08')
| -rw-r--r-- | data/2018-11-08/ohm.png | bin | 0 -> 27829 bytes | |||
| -rw-r--r-- | data/2018-11-08/ohm.txt | 9 | ||||
| -rw-r--r-- | data/2018-11-08/ohm_symlog.png | bin | 0 -> 27330 bytes | |||
| -rw-r--r-- | data/2018-11-08/workup_ohm.py | 33 |
4 files changed, 42 insertions, 0 deletions
diff --git a/data/2018-11-08/ohm.png b/data/2018-11-08/ohm.png Binary files differnew file mode 100644 index 0000000..8142011 --- /dev/null +++ b/data/2018-11-08/ohm.png diff --git a/data/2018-11-08/ohm.txt b/data/2018-11-08/ohm.txt new file mode 100644 index 0000000..7d8a582 --- /dev/null +++ b/data/2018-11-08/ohm.txt @@ -0,0 +1,9 @@ +1 0.013 +2 0.023 +5 0.054 +10 0.102 +20 0.200 +50 0.497 +100 0.993 +200 1.985 +500 4.996 diff --git a/data/2018-11-08/ohm_symlog.png b/data/2018-11-08/ohm_symlog.png Binary files differnew file mode 100644 index 0000000..6847b86 --- /dev/null +++ b/data/2018-11-08/ohm_symlog.png diff --git a/data/2018-11-08/workup_ohm.py b/data/2018-11-08/workup_ohm.py new file mode 100644 index 0000000..95ebc42 --- /dev/null +++ b/data/2018-11-08/workup_ohm.py @@ -0,0 +1,33 @@ +import numpy as np +import matplotlib.pyplot as plt + +# get data +xi, yi = np.genfromtxt('ohm.txt').T + +# prepare figure +plt.figure() +ax = plt.gca() + +# raw +ax.plot(xi, yi) +ax.grid() +ax.set_xlim(0, 500) +ax.set_ylim(0, 5 * 1.1) +ax.set_xlabel('set point') +ax.set_ylabel('measured', color='C0') +ax.set_xscale('symlog') + +# diff +ax = ax.twinx() +error = yi - (xi*0.01) +error /= xi +error *= 100 # to percent +error = np.abs(error) # absolute value +print(error) +ax.plot(xi, error, c="C1") +ax.set_ylabel('percent error', color='C1') +ax.grid() +ax.set_ylim(0, 0.3 * 1.1) +ax.set_yticks(np.linspace(0, 0.3, 6)) + +plt.savefig('ohm_symlog.png') |
