kangwonlee/18pycpp-05

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18pycpp-05's Issues

Build 21.6 failed

• https://travis-ci.org/kangwonlee/18pycpp-05/builds/446006977?utm_source=github_status&utm_medium=notification
• osx nightly
• Failed at import pylab line of python vs cython comparison

Test deletes cython cpp files

• Test saves the .h and .cpp files from the ipynb file cells and then deletes the file after test to avoid side effect.
• However, it also deletes the .h and .cpp files for the cython.

Euler : flexible slope function

• Flexible slope function $\frac{dx}{dt}$

variable problem state size (currently 1 d only)

• One of topics of #2
• Dynamic array size
• Multi-dimensional array
• https://cython.readthedocs.io/en/latest/src/tutorial/array.html

More flexible Euler method

Cython version Euler method of bcb0197 would be even better if more flexible

• variable simulation length #11
• variable problem state size (currently 1 d only) #12 #7
• variable dx/dt function #19

C/C++ build breaks

• 68f4e2e used to work about 24 hours ago but now it does not.
• Consider switching to other options

Embedded programming

• Low level instructions? 27f0f7f (roughly)
• MISRA C overview? 2c97d9f
• bit field struct? + union? 27f0f7f (roughly)

Does test check cython?

• Currently testing using jupyter nbconvert
• How does it handle cython lines?

Add a C++ version and call using cython

• bcb0197 now has a simple Euler method in python and cython.
• Call a C/C++ version through cython and plot

Number of simulation steps

• 0 ~ 1 sec
• Δt = 1e-3
• 1000? 1001?

variable simulation length

• One of topics of #2
• Need to dynamically allocate numpy.ndarray
• See https://cython.readthedocs.io/en/latest/src/tutorial/array.html
• Do people use Memory view frequently?

bit field for an embedded processor

• AVR 128?
• Beagle Bone Black?
• Raspberry Pi?

Cython example for NumPy Memory View?

• Why ? Nicer grammar? Seems a better interface?
• https://cython.readthedocs.io/en/latest/src/userguide/memoryviews.html

Multidimensional C/C++ array for `cython`

Maybe should use numpy

Simpler example for C/C++ via Cython

• 68f4e2e has an example calling a C/C++ function via cython
• It utilized NumPy so could be beneficial in the long run
• However, it seems too complicated
• C/C++ function without NumPy?

Tests on Linux breaks

• f213639 : Linux test broke while building.
• Passed local tests. Need to verify why