(My first ever StackOverflow question)
I'm trying to plot bitcoin's market-cap against the date using pandas and matplotlib in Python.
Here is my code:
%matplotlib inline
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
#read in CSV file using Pandas built in method
df = pd.read_csv("btc.csv", index_col=0, parse_dates=True)
Here are some details about the data frame:
dataframe details
matplotlib code:
#Plot marketcap(usd)
plt.plot(df.index, df["marketcap(USD)"])
plt.show()
Result:
Incorrect result
The plot seems to be more like scribbles that seem to move backwards. How could I fix this?
You can plot your Pandas Series "marketcap(USD)" directly using:
df["marketcap(USD)"].plot()
See the Pandas documentation on Basic Plotting
Related
I have this csv data file, I'm trying to create a pie chart using this data
I am a beginner in Python and don't understand how to create a pie chart using CSV
my code:
`
import pandas as pd
from matplotlib.pyplot import pie, axis, show
df = pd.read_csv ('hasil.csv')
sums = df.groupby(df["Analysis"]) ["Polarity"].sum()
axis('equal')
pie(sums, labels=sums.index)
show()
`
working solution code would be more helpful!
I am trying to plot a dataframe which has been taken from get_data_yahoo attribute in pandas_datareader.data on python IDE using matplotlib.pyplot and I am getting an KeyError for the X-Co-ordinate in prices.plot no matter what I try. Please help!
I have tried this out :-
import matplotlib.pyplot as plt
from pandas import Series,DataFrame
import pandas_datareader.data as pdweb
import datetime
prices=pdweb.get_data_yahoo(['CVX','XOM','BP'],start=datetime.datetime(2020,2,24),
end=datetime.datetime(2020,3,20))['Adj Close']
prices.plot(x="Date",y=["CVX","XOM","BP"])
plt.imshow()
plt.show()
And I have tried this as well:-
prices=DataFrame(prices.to_dict())
prices.plot(x="Timestamp",y=["CVX","XOM","BP"])
plt.imshow()
plt.show()
Please Help...!!
P.S: I am also getting some kind of warning, please explain about it if you could :)
The issue is that the Date column isn't an actual column when you import the data. It's an index. So just use:
prices = prices.reset_index()
Before plotting. This will convert the index into a column, and generate a new, integer-labelled index.
Also, in regards to the warnings, Pandas is full of them and they are super annoying! You can turn them off with the standard python library warnings.
import warnings
warnings.filterwarnings('ignore')
I have a CSV file that I am uploading into Jupyter and I am trying to delete multiple columns at once. I thought the "DEL" command would be the best but I can't get it to work.
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
% matplotlib inline
tmbd_movies = pd.read_csv('tmdb-movies.csv')
tmbd_movies.head()
del(tmbd_movies['imdb_id','homepage','tagline','keywords','overview'])
The goal was to remove the following columns:
imdb_id','homepage','tagline','keywords','overview
You want this:
tmbd_movies.drop(['imdb_id','homepage','tagline','keywords','overview'], 'columns', inplace=True)
I want the x axis tick marks to be the different states ie. IDLE, Data=Addr, Hammer, etc that are in column A of the csv file.
import pandas as pd
import matplotlib.pyplot as plt
df1 = pd.read_csv("Output.csv", index_col = 0)
df1.plot(x = df1.index.values)
I have also tried
df1.plot(xticks = df1.index.values)
without any success.
CSV File
Plot
Thanks in advance!
You may want to try Seaborn because it looks like it is not a plotting issue but rather peripheral styling issue (all blacked out) in your environment.
Once you installed Seaborn, insert a piece of code below to yours.
import seaborn as sns
sns.set_style("whitegrid")
As a side note, if you wish to align the number of ticks in x axis to that of labels you have, replace your plotting part with the following:
df1.plot()
plt.xticks(range(df1.shape[0]), df1.index)
Hope this helps.
Working through following the Machine Learning Tutorial:
http://machinelearningmastery.com/machine-learning-in-python-step-by-step/
Specifically, Section 4.2. Unfortunately, my code is throwing an error
NameError: name 'scatter_matrix' is not defined
Here is my code:
import pandas
import pandas as pd
import matplotlib
import matplotlib.pyplot as plt
url = "https://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data"
names = ['sepal-length', 'sepal-width', 'petal-length', 'petal-width', 'class']
dataset = pandas.read_csv(url, names=names)
scatter_matrix(dataset)
plt.show()
There's at least one Stack Overflow question on scatter_matrix, but I haven't able to figure out what's missing.
Pandas scatter_matrix - plot categorical variables
You will have to import it like this:
from pandas.plotting import scatter_matrix
Cause you've imported the Pandas. You could use it like below:
pd.scatter_matrix(dataset)
However, pandas.scatter_matrix() is deprecated. use pandas.plotting.scatter_matrix() instead