chrisraff

import matplotlib.pyplot as plt
import numpy as np

# matlab style errorbars
def errorbars(x, y, err, erralpha=0.2, color=None, label=None, ax=plt):
    line = ax.plot(x, y, color=color, label=label)
    col = line[0].get_color()
    plt.fill_between(x, y-err, y+err, alpha=erralpha, color=col, zorder=-1)

# example

chrisraff

//x is in range [0, 1024]
byte hueCurve(int x) {
  x += 1024/3;
  x = x % 1024;
  return max(255-abs(255-x*(255.0*3/1024)), 0);
}

void setHue(int led_id, int hue) {
  byte r = hueCurve(hue);
  byte g = hueCurve(hue+(1024*2)/3);