小编Ron*_*Ron的帖子

我是IPython Notebook的新手.我在CrunchBang(华尔道夫)上使用Anaconda发行版.我的开发周期如下:

1. Open Spyder.
2. Open the .py file if not already loaded
3. Start IPython Notebook
4. Open the specific notebook from the main IPython screen
5. Select Cell/Run All
6. Note errors. If none goto step 11.
7. Save and close the notebook
8. Shutdown the notebook from main IPython screen
9. Correct errors in Spyder and save
10. go to step 4
11. Move on to the next part of the project and start the process …

当从Linux Mint 13上的Anaconda python安装启动Spyder时,我收到以下错误:

Cannot mix incompatible Qt library (version 0x40801) with this library (version 0x40805)
Aborted

$ PATH是

   /home/ron/anaconda/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games

有人找到了解决方法吗？

Anaconda网站表明Spyder可能无法在Linux机器上正确启动.

http://docs.continuum.io/anaconda/

***解决了我有点羞怯.发现我安装了Anaconda作为sudo.如文档中所示重新安装,一切正常.谢谢大家的帮助.

我在iPython Notebook中有以下Sympy相关代码:

from sympy import *
init_printing()

...

定义常量

c, d, e, f = symbols("c, d, e, f")

...

定义两个矩阵

v = Matrix(2,1,[1,1])
w = Matrix(2,1,[2,3])

定义符号矩阵

v, v1, v2 = symbols("v, v1, v2")
v = Matrix(2,1, [v1, v2])
w, w1, w2 = symbols("w, w1, w2")
w = Matrix(2,1, [w1, w2])

添加符号向量v&w

v + w

导致以下错误消息

/home/ron/anaconda/lib/python2.7/site-packages/IPython/core/formatters.py:239:  FormatterWarning: Exception in image/png formatter: 
\left[\begin{smallmatrix}v_{1} + w_{1}\\v_{2} + w_{2}\end{smallmatrix}\right]
      ^
Expected "\right" (at char 6), (line:1, col:7)
  FormatterWarning,

然后产生正确的答案

[v1+w1v2+w2]

有趣的是,如果我重新执行单元格,错误消息就会消失.我在ipython qtconsole中尝试了相同的代码,结果相同.这是一个错误还是我的编码很差？ …

为了在gfortran中编译MPI代码,我必须使用语法

include mpif.h

在我的代码而不是

use mpi

有几个网站表明这个语法适用于Fortran 77,但我使用gfortran gcc版本4.7.2(Debian 4.7.2-5)和mpfi90用于MPICH2版本1.4.1p1.

命令行

mpif90 test1.f90 -o test1.exe

产生以下错误

test1.f90:4.8: use mpi 1 Fatal Error: Parse error when checking module version for file 'mpi.mod' opened at (1)

test1.f90(来自关于HPC的Coursera课程)

program test1

use mpi !(fails to compile)
implicit none

include 'mpif.h' !(this works)

integer :: ierr, numprocs, proc_num

call mpi_init(ierr)
call mpi_comm_size(MPI_COMM_WORLD, numprocs, ierr)
call mpi_comm_rank(MPI_COMM_WORLD, proc_num, ierr)

print *, 'Hello from Process number', proc_num, &
         ' of ', numprocs, ' processes'

call mpi_finalize(ierr)

end …