matplotlib in python - plot a graph using respective value in the x-axies and for the large numbers

Question

Can any one help me with this, i am new to graph a plot.

basically i have list of DocId's which are of some numbers and not necessarily in the order and this needs to come in X-Axies and timelst should come in Y-Axies.

below code actually plotting it, but DocId's not taken as respective DocID, its considered as range. so this needs to know and other thing is document list is huge may be i have 3000 - 5000 DocId's, can this graph goes for long for each DocID ?

import matplotlib.pyplot as plt
Doclst=   [32409057,32409058,32409059,32409060,32409061,32409062,32409063,32409065,32409066,32409067]
timelst=[120,1,4,35,675,1240,500,889,99,10]

plt.plot(Doclst, timelst, marker='o', linestyle='--', color='r', label='time')
plt.xlabel('Document ID'+"'"+'s')
plt.ylabel('Time in Seconds')
plt.title('Performance')
plt.legend()
plt.savefig('graph.png')

Please help me as early as possible.

MBR · Accepted Answer · 2013-08-27 10:23:17Z

1

Update: I added two lines, one to access the axis properties, and the other one to force all the labels to show. To avoid the labels to overlap, I add also the argument rotate in plt.ticks to rotate the label by 30°.

If I get right what you want, you should simply use plt.xticks to customize tick labels. You can do something like that

import matplotlib as mpl
import matplotlib.pyplot as plt
Doclst=   [32409057,32409058,32409059,32409060,32409061,32409062,32409063,32409065,32409066,32409067]
timelst=[120,1,4,35,675,1240,500,889,99,10]
fig, ax = plt.subplots()
plt.plot(Doclst, timelst, marker='o', linestyle='--', color='r', label='time')
plt.xlabel('Document ID'+"'"+'s')
plt.ylabel('Time in Seconds')
plt.title('Performance')
plt.legend()
plt.axis([Doclst[0], Doclst[-1], min(timelst)-1, max(timelst)+1])
ax.xaxis.set_major_locator(mpl.ticker.MaxNLocator(len(Doclst)+1))
locs,label = plt.xticks()
plt.xticks(locs, map(lambda x: "%d" %x, locs), rotation=30)
plt.show()

which will give you something like that output

edited Aug 27, 2013 at 10:23

answered Aug 27, 2013 at 7:40

MBR

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3 Comments

Gireesha Jeera Over a year ago

Thanks MBR, this works perfectly. if i want this list to continue for some 2000 DocId's this x-axies will not run for 2000 and its ending with 8 DocIDs.

Gireesha Jeera Over a year ago

This is just Excellent work MBR, appreciate your turn arround time and great piece of information. thank you once again. this works just as i wanted.

MBR Over a year ago

You're welcome! By the way, welcome to StackOverflow! Since you are new, you might want to check this link.

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