gistfile1.txt

####################################
# Golden Spiral Heatmap Demo 
# Questions? Email feedback@plot.ly
# For more docs, see plot.ly/api
####################################

from numpy import *

# Golden spiral with fibonacci rectangles

## Build the spiral
def spiral(th):
    a = 1.120529
    b = 0.306349 
    r = a*exp(-b*th)
    return (r*cos(th), r*sin(th))

nspiral = 2 # number of spiral loops

th = linspace(-pi/13,2*pi*nspiral,1000); # angle
(x,y) = spiral(th)

yshift = (1.6 - (max(y)-min(y)))/2  # shift the spiral north so that it is centered

s = {'x': -x+x[0], 'y': y-y[0]+yshift, 'line':{'color':'white','thickness':3}}  # spiral

## Build the rectangles as a heatmap
# specify the edges of the heatmap squares
phi = ( 1+sqrt(5) )/2.
xe = [0, 1, 1+(1/(phi**4)), 1+(1/(phi**3)), phi]    
ye = [0, 1/(phi**3),1/phi**3+1/phi**4,1/(phi**2),1]

z = [ [13,3,3,5],
      [13,2,1,5],
      [13,10,11,12],
      [13,8,8,8]
    ]

hm = {'x':sort(xe), 'y':sort(ye)+yshift, 'z': z, 'type':'heatmap', 
      'scl':[[0,"rgb(12,51,131)"],[0.25,"rgb(10,136,186)"],[0.5,"rgb(242,211,56)"],[0.75,"rgb(242,143,56)"],[1,"rgb(217,30,30)"]]}

layout = {'margin':{'t':200,'r':200,'b':200,'l':200},
    'xaxis':{'range':[0,1.6],'autorange':False,'showgrid':False,'zeroline':False,'linecolor':'rgba(0,0,0,0)','showticklabels':False,'ticks':None},
    'yaxis':{'range':[0,1.6],'autorange':False,'showgrid':False,'zeroline':False,'linecolor':'rgba(0,0,0,0)','showticklabels':False,'ticks':None},
    'showlegend':False,'width':700,'height':700,'autosize':False}

plot([s, hm],layout=layout)