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Calling numpy on parallel processors in IJulia notebook

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问题 I want to run a simple code in the IJulia notebook which uses the python library numpy. I call numpy with PyCall: using PyCall @pyimport numpy as np This works fine. I then want to split this up to several processors. I add the processors: addprocs(4) Then, I run N/proc iterations for a function f, where proc is my number of processors. I split the load evenly between the four processors on my computer: n=round(Int,N/proc); proc_sum = @parallel (+) for i=1:proc f(n) end return proc_sum / proc

Julia DataFrame output functions

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What Julia functions can output a DataFrame so it is converted into text other than the ones shown below? using DataFrames A = DataFrame(randn(10, 7)); print("\n\n\n", "A = DataFrame(randn(10, 7))") print("\n\n\n","print(A)\n") print(A) print("\n\n\n","show(A)\n") show(A) print("\n\n\n","show(A, true)\n") show(A, true) print("\n\n\n","show(A, false)\n") show(A, false) print("\n\n\n","showall(A)\n") showall(A) print("\n\n\n","showall(A, true)\n") showall(A, true) print("\n\n\n","showall(A, false)\n") showall(A, false) print("\n\n\n","display(A)\n") display(A) Most of these output something

Kernel Error in IJulia notebook--Failed to Start the Kernel in Jupyter

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Do you know how to fix this kernel error and what caused it? I have called Julia from xterm bash like the following photo: So I used the following commands and then the kernel starts successfully in IJulia Notebook: Pkg.update() Pkg.build("IJulia") using IJulia; notebook() 来源： https://stackoverflow.com/questions/35195061/kernel-error-in-ijulia-notebook-failed-to-start-the-kernel-in-jupyter