On 17/10/2013 02:31, Brandon La Porte wrote:
On Wednesday, 16 October 2013 18:31:09 UTC-4, Mark Lawrence wrote:
On 16/10/2013 22:34, Brandon La Porte wrote:
I have the following code to make a plot of 4 different supply curves
(economics).
from matplotlib import pyplot as plt
price = range(0,51)
q1 = [x/2.0 for x in price]
q2 = [x/4.0 for x in price]
q3 = [x/5.0 for x in price]
q4 = [x/10.0 for x in price]
markers_on = [20, 40]
plt.plot(q1,price,'b',q2,price,'g',q3,price,'r', q4, price, 'y' )
plt.title('Supply Curve')
plt.xlabel('Quantity Supplied (Thousands per month')
plt.ylabel('Price ($)')
#plt.legend(('Kd = %d'%kd, 'Kd = %d'%kd2, 'Kd = %d'% kd3, 'Step'), loc=4)
plt.legend(('p = 2Qs', 'p = 4Qs', 'p = 5Qs', 'p = 10Qs'), loc=4)
plt.grid()
plt.show()
I would like to place markers on the 4 curves when the price is equal to $20
label it A, and when the price is equal to $40 and label it B. Does anyone
know how I can accomplish this.
If this matplotlib.pyplot.text described here
http://matplotlib.org/api/pyplot_api.html isn't any good I suggest you
ask on the dedicated matplotlib users mailing list see
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
--
Roses are red,
Violets are blue,
Most poems rhyme,
But this one doesn't.
Mark Lawrence
Hi Mark
Thanks for the quick reply. I went through the documentation briefly and made
some changes.
from matplotlib import pyplot as plt
q1 = 2.0
q2 = 4.0
q3 = 5.0
q4 = 10.0
p1 = 20
p2 = 40
price = range(0,51)
qlist1 = [x/q1 for x in price]
qlist2 = [x/q2 for x in price]
qlist3 = [x/q3 for x in price]
qlist4 = [x/q4 for x in price]
plt.plot(qlist1,price,'b',qlist2,price,'g',qlist3,price,'r', qlist4, price, 'y'
)
plt.plot(p1/q1,p1,'ko', p1/q2, p1, 'ko', p1/q3,p1, 'ko', p1/q4, p1, 'ko')
plt.plot(p2/q1,p2,'ks', p2/q2, p2, 'ks', p2/q3,p2, 'ks', p2/q4, p2, 'ks')
plt.title('Supply Curve')
plt.xlabel('Quantity Supplied (Thousands per month)')
plt.ylabel('Price ($)')
plt.legend(('p = 2Qs', 'p = 4Qs', 'p = 5Qs', 'p = 10Qs'), loc=4)
plt.grid()
plt.show()
I'm sure there is a better or more "Pythonic" way to do this, and I still need
to figure out how to label the individual points. Again thanks for the links, and I'll
update this post when I figure it out.
Thanks
Brandon
Fine, if you need more help I'll try but I'm no matplotlib expert, your
best bet is still its user mailing list.
Slight aside would you please read and action this link
https://wiki.python.org/moin/GoogleGroupsPython, a quick glance above
will tell you why, thanks :)
--
Roses are red,
Violets are blue,
Most poems rhyme,
But this one doesn't.
Mark Lawrence
--
https://mail.python.org/mailman/listinfo/python-list
