All Questions
25 questions
2
votes
2
answers
12k
views
Problem plotting a histogram of grayscale image in python
I have plotted a histogram
of a grayscale image
with matplotlib. But the histogram does not look like what I want.
from matplotlib import pyplot as plt
import numpy as np
from PIL import Image
im=...
- 27.6k
4
votes
1
answer
2k
views
Plot a histogram with constant bar widths but different bin sizes
I have a Python script which produces a single histogram of three data sets, where the bin sizes are provided as a list.
The Python script sippet is as follows:
bin_l=np.arange(0,14,1)
bin_l=np....
- 34k
16
votes
4
answers
18k
views
Any way to create histogram with matplotlib.pyplot without plotting the histogram?
I am using matplotlib.pyplot to create histograms. I'm not actually interested in the plots of these histograms, but interested in the frequencies and bins (I know I can write my own code to do this, ...
- 59
7
votes
2
answers
10k
views
Python: matplotlib - probability mass function as histogram
I want to draw a histogram and a line plot at the same graph. However, to do that I need to have my histogram as a probability mass function, so I want to have on the y-axis a probability values. ...
- 75
0
votes
1
answer
450
views
Overlapping density plots of multiple pandas data frame columns
import numpy as np
import pandas as pd
col1 = np.random.normal(0, 1, (1000, ))
col2 = np.random.normal(0, 1, (1000, ))
col3 = np.random.normal(0, 1, (1000, ))
df = pd.DataFrame({'col1':col1, 'col2':...
- 70
2
votes
1
answer
266
views
How to plot multiple features with the same tag number in histogram plot
I have a text file including 8 features and 1 class. The data of my file is (data.txt):
1,1,3,2,1,1,1,3,HIGH
1,1,3,1,2,1,1,3,HIGH
1,1,1,1,3,3,1,2,HIGH
1,3,2,1,3,3,3,3,HIGH
1,3,1,2,3,1,2,1,HIGH
2,3,1,...
- 39.1k
1
vote
0
answers
249
views
Plotting histogram with python 2.7 with log scale on y axis
I want to plot an histogram in python 2.7 whith a log scale on y axis:
I wrote this code:
plt.hist(lifes,100, log=True)
But the results of histogram changed for the two axis like this:
But in the ...
- 38.8k
0
votes
0
answers
42
views
Histogram with counts of string variables in matplotlib [duplicate]
I want to plot a histogram with matploblib in Python, but my code doesn't seem to work. I imported data from a textfile with the following code:
vragenlijst_data= np.genfromtxt('antwoorden.txt', ...
- 51.2k
15
votes
1
answer
31k
views
How to generate a word frequency histogram, where bars are ordered according to their height
I have a long list of words, and I want to generate a histogram of the frequency of each word in my list. I was able to do that in the code below:
import csv
from collections import Counter
import ...
- 26.1k
2
votes
1
answer
1k
views
Column order reversed in step histogram plot
Passing a 2D array to Matplotlib's histogram function with histtype='step' seems to plot the columns in reverse order (at least from my biased, Western perspective of left-to-right).
Here's an ...
- 25.5k
0
votes
1
answer
64
views
How to create a historgram in matplotlib with values instead of data
Supposed I have the data set [1,1,1,2,2] and want the bins [1,2),[2,3)
then I can use the follwoing code to generate a histogram:
import matplotlib.pyplot as plt
data = [1,1,1,2,2]
values = [1,2,3]
...
- 1,965
0
votes
1
answer
1k
views
TypeError when plotting histogram with Matplotlib
I'm trying to plot a histogram of a file of float numbers. The contents of the file look like this:
0.1066770707640915
0.0355590235880305
0.0711180471760610
0.4267082830563660
0.0355590235880305
0....
- 69.3k
0
votes
1
answer
469
views
Meaning of colors in histogram matplotlib
l have a numpy variable called rnn1 of dimension(37,512)
n, bins, patches = plt.hist(rnn1, histtype='stepfilled')
l got the following histogram shape
To what the different colors refer ?
What is the ...
- 40.8k
1
vote
1
answer
1k
views
Symmetrize a histogram plot or array?
I have a histogram that runs from -5 to 5 that I can manipulate and plot as I please, and I use the following PDF's to run one-sample KS tests on it: norm, cauchy, students t, laplace.
However, I ...
1
vote
1
answer
528
views
Convert a Histogram which has two variables plotted on it into a smooth Curve
Here is the code for generating the histogram. For the full code you can refer to this iPython Notebook
# Splitting the dataset into malignant and benign.
dataMalignant=datas[datas['diagnosis'] ==1]
...
- 703