OVMS3-idf/tools/tiny-test-fw/Utility/LineChart.py
He Yin Ling 98d1f05ab5 tiny-test-fw: add utilities:
1. Attenuator: control programmable attenuator
2. PowerControl: control APC PDU to power on/off devices
3. LineChart: use matplotlib to draw line chart
2018-05-15 03:29:31 +00:00

50 lines
1.6 KiB
Python

# Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http:#www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import matplotlib
# fix can't draw figure with docker
matplotlib.use('Agg')
import matplotlib.pyplot as plt
# candidate colors
LINE_STYLE_CANDIDATE = ['b-o', 'r-o', 'k-o', 'm-o', 'c-o', 'g-o', 'y-o',
'b-s', 'r-s', 'k-s', 'm-s', 'c-s', 'g-s', 'y-s']
def draw_line_chart(file_name, title, x_label, y_label, data_list):
"""
draw line chart and save to file.
:param file_name: abs/relative file name to save chart figure
:param title: chart title
:param x_label: x-axis label
:param y_label: y-axis label
:param data_list: a list of line data.
each line is a dict of ("x-axis": list, "y-axis": list, "label": string)
"""
plt.figure(figsize=(12, 6))
plt.grid(True)
for i, data in enumerate(data_list):
plt.plot(data["x-axis"], data["y-axis"], LINE_STYLE_CANDIDATE[i], label=data["label"])
plt.xlabel(x_label)
plt.ylabel(y_label)
plt.legend(fontsize=12)
plt.title(title)
plt.tight_layout(pad=3, w_pad=3, h_pad=3)
plt.savefig(file_name)
plt.close()