up vote -1 down vote favorite

here is the data: 

111, 3  
122, 4  
155, 3  
192, 5  
11,  9  
123, 10  
120, 23

now how could I able to plot a histogram using this two set of data in matplotlib. please help.

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1 Answer

up vote 5 down vote

You can create a barchart like this:

from matplotlib.pyplot import *
x = [111,122,155,192,11,123,120,]
y = [3,4,3,5,9,10,23]
bar(x,y)
show()

gives: enter image description here Using hist() bins your data for you, so you would pass it your raw data, ie. it would look like this:

data = [111, 111, 111, 122, 122, 122, 122, 155, ...]
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@abhisek - The above plot is a histogram. – fraxel May 9 '12 at 9:04
i dont need any info about bar diagram. Please give me the codes for histogram only. – abhisek May 9 '12 at 9:06
@abhisek - In an histogram the area of the bar is equal to the frequency of that data. It can be drawn as a barchart. Your data (appears to, although your question is unclear) contains frequency infomation, so the easiest way to plot it as a histogram is to do the above. I also explain that if your data is raw, you can use hist() and it will generate the histogram for you. – fraxel May 9 '12 at 9:14
2  
@abhisek: too bad there's no downvoting for comments. – Zhenya May 9 '12 at 9:18

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