Tutorial 03 -Code Logic: Functions, Conditionals and Loops

JIANWEI LI

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Data Mining the City

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2 min read

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Sep 27, 2017

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import csv
def setup():
 size(480,120)
with open(“4.5_week.csv”) as e:
 reader = csv.reader(e)
 header = reader.next() # skip the header row.
 print header
 
 global magnitudes # means make this “ magnitudes” as global var
magnitudes = []
 # make a group
 
 for row in reader: # var = row 
 magnitude = float(row[4])
 magnitude+=1
 magnitudes.append(magnitude)
 print magnitudes
 
def draw():
 background(0)
scalar = 10
 x = 0
 for magnitude in magnitudes:
 leftEdge = x — (magnitude*scalar)/2
 rightEdge = x + (magnitude*scalar)/2
 if leftEdge < mouseX and mouseX<rightEdge:
 fill(155,221,255) # columbia’s color
 rectMode(CENTER)
 rect(x,height/2,magnitude*scalar*1.5,magnitude*scalar*1.5,8)
else:
 fill(255,255,255)
ellipse(x,height/2,magnitude*scalar,magnitude*scalar)
 x+=5
 saveFrame(‘output.png’)

import csv
def setup():
 size(480,480)
with open(“4.5_week.csv”) as e:
 reader = csv.reader(e)
 header = reader.next() # skip the header row.
 print header
 
 global magnitudes # means make this “ magnitudes” as global var
 global lats
 global lons
magnitudes = []
 lats = []
 lons = []
 # make a group
 
 for row in reader: # var = row 
 magnitude = float(row[4])
magnitudes.append(magnitude)
 # print magnitudes
lat = float(row[1])
 
 lats.append(lat)
 # print lats
 
 lon = float(row[2])
 
 lons.append(lon)
 # print lats
def draw():
 background(0)
scalar = 0.8
 x = 0
 i = 0
 t = 3
 while i < len(magnitudes):
 lon = lons[i]
 lat = lats[i]
 
 magnitude = magnitudes[i]
 u = lon+width/2
 v = (-lat)+height/2 # (-lat)
 
 
 # set range
 xleftEdge = u-(magnitude*scalar)/4
 xrightEdge = u+(magnitude*scalar)/4
 yleftEdge = v-(magnitude*scalar)/4
 yrightEdge = v+(magnitude*scalar)/4
if (xleftEdge < mouseX and mouseX< xrightEdge) and (yleftEdge< mouseY and mouseY <yrightEdge):
 fill(155,221,255) # columbia’s color
 rectMode(CENTER)
 rect(u,v,magnitude*scalar*t,magnitude*scalar*t,8)
 textSize(12)
 text(“The magnitude of this earthquake is located at “+ str(lat)+”, “+str(lon), 30,height*3/4)
 else:
 fill(255,255,255)
 ellipse(u,v,magnitude*scalar,magnitude*scalar)
 i+=1