adding sparkline example

Author: jposada202020

docs/examples.rst

@@ -140,3 +140,12 @@ umap simple example
     :caption: examples/uplot_umap.py
     :linenos:
 .. image:: ../docs/uplot_ex17.jpg
+
+Sparkline Animation Example
+---------------------------
+
+Sparkline animation example
+
+.. literalinclude:: ../examples/uplot_sparkline.py
+    :caption: examples/uplot_sparkline.py
+    :linenos:

examples/uplot_sparkline.py

@@ -0,0 +1,47 @@
+# SPDX-FileCopyrightText: Copyright (c) 2023 Jose D. Montoya
+#
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+from ulab import numpy as np
+from adafruit_display_shapes.sparkline import Sparkline
+from circuitpython_uplot.uplot import Uplot, color
+
+
+# Setting up the display
+display = board.DISPLAY
+
+# Adding the plot area
+plot = Uplot(0, 0, display.width, display.height)
+
+# 500 linearly spaced numbers
+x = np.linspace(-10 * np.pi, 10 * np.pi, 500)
+
+# the function, which is y = sin(x) here
+y = np.sin(x)
+
+# Creating the sparkline
+sparkline = Sparkline(
+    width=200,
+    height=200,
+    max_items=80,
+    y_min=np.min(y),
+    y_max=np.max(y),
+    x=100,
+    y=40,
+    color=color.TEAL,
+)
+
+# Adding shapes to the plot
+plot.append(sparkline)
+
+# Plotting and showing the plot
+display.show(plot)
+
+for element in y:
+    display.auto_refresh = False
+    sparkline.add_value(element)
+    display.auto_refresh = True
+
+    time.sleep(0.1)