kangwonlee/nmisp

Numerical Methods in SciPy

Hi there 👋

nmisp's Issues

test at the main project level

• CI Windows setup takes 10+ minutes each
• Test after setup takes about 1 ~ 2 minute, if correct
• Maybe better to test at the main project level

How to convert a math formula to python?

sine sqaure
square root

valid variable name

review test setup processes

• Anything not absolutely necessary?

*Instruction Video* uses sourcetree

• Indicate source tree in Instruction Video
• Prefer git bash

Does this really need an IDE?

• ReadMe.md lists three IDEs but ipynb may not need them

Indicate closed caption to *instruction video*

Indicate closed caption in instruction video of ReadMe.md file

Jupyter notebook tutorial

• Need a tutorial for the Jupyter Notebook

consider a separate configuring script

• As of fe446a4, .travis.yml seems too complicated
• See https://github.com/rasbt/watermark/blob/master/.travis.yml
• #48 recommends separation too
• May enable more code reuse

Test breaks

• https://travis-ci.org/kangwonlee/nmisp/builds/415016317
• https://travis-ci.org/kangwonlee/nmisp/builds/415016576
• https://travis-ci.org/kangwonlee/nmisp/builds/415016587
• https://travis-ci.org/kangwonlee/nmisp/builds/415016599

Need to revise test function too

add two `\n`s at the end of each cell

• It would make the cell invariant to appending more lines at the end of the cell
• Consider using https://github.com/kangwonlee/nbutils

Simpler 3D graphics

list <-> numpy.array <-> numpy.matrix seems confusing

Add a new `Try this` to 00/00 : plot a new graph

• cos
• x**2 - 4

Try this using $sin(\theta)$

Solvable using $arcsin(x)$

Easier ReadMe.md

How to make it easier to understand?

• Move SW install to tutorial
• #175
• Describe Google Colab
• Less descriptions on the IDE

Still true ?

• https://github.com/kangwonlee/nmisp/blame/4912d679d45a3fa30ba05f65f3c213c57d638e69/README.md#L37
• https://github.com/kangwonlee/nmisp/blame/4912d679d45a3fa30ba05f65f3c213c57d638e69/README.md#L99

`numpy.matrix` and `@` operator

See what-are-the-differences-between-numpy-arrays-and-matrices-which-one-should-i-u

test too slow

• may take more than 4 minutes
• parallelize?

Travis CI cache

• 416cc68 passes test
• which option is the best?

source activate -> conda activate for conda >= 4.4

• If conda>=4.4, it prefers conda activate
• How to apply efficiently? Commit a change to develop and then merge to each branch?

Verify units of cantilever example 50/45

• mm or m?

Exercise example for NR?

• Differentiable
• Useful
• Moderately challenging
• Hand verifiable?
• Local minimum?

Consider selective builds

• May not need to maintain all the combinations
• kangwonlee/momisp#32, * kangwonlee/momisp#28

Split chapters into subtrees

Split chapters subtrees and distribute as the semester progresses

"Direction Field", "solution curve"

See 1.3 of Zill & Cullen, Advanced Engineering Mathematics, 3rd Ed., Jones and Bartlett Publishers

Travis CI Windows does not use cache

• 64bc80b
• $HOME/miniconda/ folder exists in the cache
• $HOME/miniconda/Scripts folder may not exist in the cache

cache validation

• 9de91bc enabled Travis-CI cache
• How to know if cache is in desirable condition?

Add english caption to the *instruction video*

Add english caption to the instruction video

interpret result

Commit 2088659 employs statmodels.api.OLS for linear regression. Need to interpret the result in detail.

Scipy-lectures may have simpler page.

Split sequential method function definition and usage parts?

sequential method function cell contains function definition and function usage lines.

What about splitting the two? Too cumbersome to run multiple cells?

Installation video playlist

• Currently 30 videos in the playlist
• Covers Anaconda, git, Anaconda Navigator, spyder, PyCharm (+JDK), SourceTree
• Hopefully shorter version
• May need to add subtitles
• Consider with #8
• A new list for ipynb?
  install Anaconda (without MS VS Code) → install git for Windows → git clone <repository url> → cd <folder> → jupyter notebook

(xmin, xmax, ymin, ymax) -> (left, right, bottom, top)

• py.xlim(), py.ylim()
• Will be gone by matplotlib 3.2

Check 40.00 Try this equation

Looks broken on github

"It is not currently possible to manually set the aspect on 3D axes"

• https://travis-ci.org/kangwonlee/nmisp/jobs/543256948
• From conda info

matplotlib                3.1.0            py37h54f8f79_0

• It was OK with

matplotlib                3.0.2            py37h5429711_0

Make materials easy to understand

ADEPT Method

• Analogy
• Diagram
• Example
• Plane Expression
• Technical Definition

ref: Siraj Raval, How to Learn Mathematics Fast

What to cover for the vector and matrix?

Zill and Cullen :

vector

• Vector on 2D space
• Vector on 3D space
• Inner product
• Vector product
• Line and Plane on 3D space
• Vector space
• Orthonormalization

matrix

• Matrix arithmetics
• System of Linear Equations
• Rank of a matrix
• Determinant
• Inverse
• Cramer's rule
• Eigenvalue problem
• Power of a matrix
• Orthogonal matrix
• Approximations of eigenvalues
• Diagonalization
• Encoding
• Error correction code
• Minimization

Add statistics

There have been some request on statistics

README for `git log --graph`

• To show \ in git log --graph
  Windows cmd font
• Search for common aliases and add to .bashrc

Add more time measurement

Evaluating execution time seems important

Link (temporary)

move some code blocks into separate python files

• #38 #48

Motivation

• See if this makes testing faster

Action plan

• Separate code blocks not directly related to the content of the tutorial
• Also test separately

`tests/py.test` would not run in Windows

Temporary files permission issue occurs

See if Jupyter Book is suitable

• See if Jupyter book would be good for this
• https://jupyter.org/jupyter-book/intro.html
• Heard from https://discourse.jupyter.org/t/jupyter-community-calls/668
• Sample videos from community call : https://www.youtube.com/playlist?list=PLUrHeD2K9Cmkoamm4NjLmvXC4Y6E1o8SP

Requirements

• Easy to deploy
• Easy to install
• Easy to run codes
• Easy to mix equations
• Easy to mix codes

Regression video

Seemingly too long?
99ca6a0

Windows miniconda HTTPS error

• link0 link1

$ conda update -q conda;
Solving environment: ...working... failed
The command "conda update -q conda;" failed and exited with 1 during .
Your build has been stopped.
CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://repo.anaconda.com/pkgs/r/noarch/repodata.json.bz2>
Elapsed: -
An HTTP error occurred when trying to retrieve this URL.
HTTP errors are often intermittent, and a simple retry will get you on your way.
If your current network has https://www.anaconda.com blocked, please file
a support request with your network engineering team.
SSLError(MaxRetryError('HTTPSConnectionPool(host=\'repo.anaconda.com\', port=443): Max retries exceeded with url: /pkgs/r/noarch/repodata.json.bz2 (Caused by SSLError("Can\'t connect to HTTPS URL because the SSL module is not available."))'))

Vector / Matrix multiplication before ODE?

State space representation multiplies a matrix with a column vector

Describe how to subscribe upstream

https://help.github.com/articles/syncing-a-fork/

Add test?

https://github.com/kangwonlee/17sol_mech_2/tree/master/tests

.travis.yml language -> shell

To test windows

Try This for first plotting example

• Change interval of x array
• Change minimum / maximum of x
• Change line type of the plot ('-', '.-', 'o-', '--', ...)
• Make xticks() example to latter order

Travis-CI cache without a default environment

• Test result link
• Currently c85c592 caches followings:

cache :
  directories:
    - $HOME/download
    - $HOME/miniconda
    - $HOME/AppData/Local/Temp/chocolatey

• Which folder contains the conda default environment info?'
• NoBaseEnvironmentError seems relatively new

Change folder name in `Readme.md`

Change folder name in Readme.md to a more generic one.