All Questions
444 questions
40
votes
3
answers
180k
views
Extract csv file specific columns to list in Python
What I'm trying to do is plot the latitude and longitude values of specific storms on a map using matplotlib,basemap,python, etc. My problem is that I'm trying to extract the latitude, longitude, and ...
- 695
22
votes
3
answers
173k
views
ValueError: x and y must be the same size
import numpy as np
import pandas as pd
import matplotlib.pyplot as pt
data1 = pd.read_csv('stage1_labels.csv')
X = data1.iloc[:, :-1].values
y = data1.iloc[:, 1].values
from sklearn.preprocessing ...
- 1,130
16
votes
3
answers
84k
views
How to make grouper and axis the same length?
For my assignment I'm supposed to plot the tracks of 20 hurricanes on a map using matplotlib. However when I run my code I get the error: AssertionError:Grouper and axis must be the same length
Here'...
- 695
15
votes
2
answers
68k
views
How to display image stored in pandas dataframe?
import pandas as pd
from scipy import misc
import numpy as np
import matplotlib.pyplot as plt
W = {'img':[misc.imread('pic.jpg')]}
df = pd.DataFrame(W)
# This displays the image
plt.imshow(df.img1[0]...
- 5,376
13
votes
3
answers
92k
views
How to plot CSV data
I have a python code in which I read a csv file using pandas and store date and time in one column Datetime. Now i want to plot Sensor Value on y-axis and datatime on x-axis. How can i achieve this? ...
- 221
9
votes
1
answer
27k
views
How to modify 2d Scatterplot to display color based off third array in csv file?
I am using Python and a CSV file. I am currently trying to modify the scatter plot(2d) below to change colors based on a third column in my csv file. After searching through multiple posts, I ...
- 619
8
votes
2
answers
5k
views
How to plot date data evenly along x-axis?
I am plotting data from a csv file with the values on the y-axis and the date on the x-axis. My dataset only includes data from June, July and August over a 15 year period. However, when I try to plot ...
- 175
8
votes
3
answers
78k
views
How do I fix this type error ('value' must be an instance of str or bytes, not a float) on Python
I want to plot a graph for Covid-19 in India and so far there's no problem when I manually input my data as x and y axis. But since the data is quite long and when I want to read it as .csv file, it ...
- 93
7
votes
2
answers
40k
views
pyplot x-axis being sorted
This is all on a windows 7 x64 bit machine, running python 3.4.3 x64 bit, in the PyCharm Educational edition 1.0.1 compiler. The data being used for this program is taken from the Citi Bike program in ...
- 302
6
votes
1
answer
34k
views
How to plot pie chart using data frame group by different range?
My Code is:
import pandas as pd
import matplotlib.pyplot as plt
from matplotlib import style
df=pd.read_csv("patient1.csv")
a=df.loc[df.Age<18,['Age']]
print(a)
b=df.loc[(df.Age >= 18) & (...
- 61
6
votes
1
answer
19k
views
Highlight specific points in matplotlib scatterplot
I have a CSV with 12 columns of data. I'm focusing on these 4 columns
Right now I've plotted "Pass def" and "Rush def". I want to be able to highlight specific points on the scatter plot. For ...
- 767
5
votes
2
answers
6k
views
Creating a live plot of CSV data with Matplotlib
I am trying to use Matplotlib to visualize some measurements. The measurements typically last about 24hrs and will include ~30k lines of data in the csv. I've been struggling mostly with getting my ...
- 129
4
votes
2
answers
27k
views
How to plot a graph from csv in python
I have the following code and was wondering how to plot it as a graph in python
year,month,sales,expenditure
2018,jan,6226,3808
2018,feb,1521,3373
2018,mar,1842,3965
2018,apr,2051,1098
2018,may,1728,...
user13744956
4
votes
1
answer
10k
views
How to read the date/time field from the csv file and plot a graph accordingly in python
Im importing records from a CSV file using python csv module .
The date/Time field expects the date to be in a specific format, but
different spreadsheet programs default to different types of ...
- 39
4
votes
1
answer
6k
views
Python Pandas value counts for multiple columns and generate graph from the result
I have a csv to read from as follows
A B C
Sam 123 PID-213
Sam 145 PID-432
Sam 123 PID-546
Dan 786 PID-321
Dan 897 PID-432
and I want a group as below: count of unique B elements and Pids. (Bis ...
- 247