Julia pyplot issue

Nan Jiang –

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Problems

  1. runtime error. 
    Runtime Error R6034
Program; C:\Users\c\AppData\Local\Julia-0.6.0\bin\julia.exe
R6034
An application has made an attempt to load the C runtime library incorrectly.
Please contact the application's support team for more information.```
  2. Qt error 
    The application failed to start because it could not find or load the QT platform plugin "windows" in "",
Available platform plugins are: minimal, offscreen, windows

Solution 1

  1. do not use pyplot(), use GR() 
    using Plots
GR()
histogram(randn(10000))

Solution 2

do the following instruction step by step.

  1. re-install matplotlib 
    conda uninstall matplotlib
pip install -U matplotlib
  2. test your matplotlib will work in python. 
    import matplotlib.plot as plt
import numpy as np
x = np.linspace(0,2*pi,1000); y = np.sin(3*x + 4*np.cos(2*x));
plt.plot(x, y, color="red", linewidth=2.0, linestyle="--")
plt.show()
  3. config your python path, then rebuild the PyCall module. 
    using Pkg
ENV["PYTHON"]="D://miniconda//python.exe" # "path to your python"
Pkg.build("PyCall")
  4. verify you can use PyCall to call Matplotlib in julia.
using Pycall
@pyimport numpy as np
@pyimport matplotlib.pyplot as plt
x = np.linspace(0,2*pi,1000); y = np.sin(3*x + 4*np.cos(2*x));
plt.plot(x, y, color="red", linewidth=2.0, linestyle="--")
plt.show()
  1. reinstall Plots and PyPlot. 
    using Pkg
Pkg.rm("Plots")
Plt.rm("PyPlot")
Pkg.add("Plots")
Pkg.add("PyPlot")
  2. finally check that you can see the gui. 
    using PyPlot
# use x = linspace(0,2*pi,1000) in Julia 0.6
x = range(0; stop=2*pi, length=1000); y = sin.(3 * x + 4 * cos.(2 * x));
plot(x, y, color="red", linewidth=2.0, linestyle="--")
title("A sinusoidally modulated sinusoid")

Reference

  1. Pyplot.jl
  2. stackoverflow

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