'numpy.float64' object has no attribute 'plot'

Question

I have a very simple code but at the end i found problem which I couldn't solve or find any solution. I can't draw plot. All I get is error AttributeError: 'numpy.float64' object has no attribute 'plot'

import pylab as p
import numpy as np
import sympy as s
import matplotlib
from random import random

X=np.arange(0,1000)
y=np.random.randint(100,size=1000)

if len(X)==len(y):
    print "ok"
else:
    print "not ok"

 polyfit=np.polyfit(X,y,6)
 poly1d=np.poly1d(polyfit)
 print poly1d


i=1
my=[]
for i in X:
    p=poly1d(i)
    my.append(p)

 print my

 p.plot(X,my)
 p.show()

I look after docs but I found nothing,google also can't help me.

Ffisegydd · Accepted Answer · 2015-01-02 19:13:21Z

5

You've overwritten the pylab module accidentally later on in your code by assigning something else to p. You can avoid this by just importing pylab and using, for example, pylab.plot.

You've also got some indentation issues, remember that indentation matters in Python.

Using matplotlib.pyplot is generally recommended as opposed to using pylab. As such I've modified the code below to use pyplot over pylab. I've also removed some unneeded parts of the code and generally tidied it up.

import matplotlib.pyplot as plt
import numpy as np
from random import random

X=np.arange(0,1000)
y=np.random.randint(100,size=1000)

if len(X)==len(y):
    print("ok")
else:
    print("not ok")

polyfit=np.polyfit(X,y,6)
poly1d=np.poly1d(polyfit)

my=[]
for i in X:
    p=poly1d(i)
    my.append(p)

plt.plot(X,my)
plt.show()

edited Jan 2, 2015 at 19:13

answered Jan 2, 2015 at 16:14

Ffisegydd

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6 Comments

wiedzminYo Over a year ago

Of course!I feel so stupid now.Thank you for your help.

Carl Witthoft Over a year ago

Wouldn't it be cleaner (and safer) to replace his object p with, say myp rather than dealing with calling pylab over p ?

tacaswell Over a year ago

You should never import pylab use pyplot intead

tacaswell Over a year ago

Can you please change the code in your answer (it is 2 lines)? It is best to not have answers showing worst practices around (I could just change it, but that seems rude).

tacaswell Over a year ago

pylab is too pervasive to actually deprecate, so the current plan is to just pretend it does not exist ;)

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