matlib | Matrix Functions for Teaching and Learning Linear Algebra | Math library

by friendly R Version: v0.9.4 License: No License

X-Ray Key Features Code Snippets(1)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | matlib Summary

matlib is a R library typically used in Utilities, Math applications. matlib has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Matrix Functions for Teaching and Learning Linear Algebra and Multivariate Statistics, These functions are mainly for tutorial purposes in teaching & learning matrix algebra ideas using R. In some cases, functions are provided for concepts or computations available elsewhere in R, but where the name is not obvious. In other cases, we provide cover functions to show or demonstrate an algorithm in more detail, sometimes providing a verbose = argument to print the details of computations. In addition, a collection of functions are provided for drawing vector diagrams in 2D and 3D, illustrating various concepts of linear algebra more concretely than has been available before.

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Support

matlib has a low active ecosystem.

It has 48 star(s) with 10 fork(s). There are 9 watchers for this library.

It had no major release in the last 12 months.

There are 2 open issues and 26 have been closed. On average issues are closed in 69 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of matlib is v0.9.4

Quality

matlib has 0 bugs and 0 code smells.

Security

matlib has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

matlib code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

matlib does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

matlib releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

It has 52545 lines of code, 0 functions and 263 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

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matlib Key Features

No Key Features are available at this moment for matlib.

matlib Examples and Code Snippets

matlib ,Installation

Lines of Code : 4

License : No License

Copy

 install.packages("matlib")

 if (!require(devtools)) install.packages("devtools")
 library(devtools)
 install_github("friendly/matlib", build_vignettes = TRUE)

Community Discussions

Trending Discussions on matlib

How to color cells in a plt plot based on value?

Python_LIBRARY in CMake NotFound

A simple makefile in C - Object file with different name from C file

could not find function "is.square.matrix"

ValueError: x and y must have same first dimension, but have shapes, tkinter and matplotlib problem

C++ copy constructor for a class with an array attribute

Solving simultaneous equations/inequalities

Problematic for loop conversion from MATLAB to Python

numpy turning matrixes into vectors and combining them

MATLAB conversion to python? Error in python due to shapes of arrays

QUESTION

How to color cells in a plt plot based on value?

Asked 2022-Mar-08 at 09:50

Im trying to use pylot to illustrate a layout in a robotic path planning RL concept. I've created the layout as below, but I cannot get the cells to color based on the value of the cell. I've used an np.array to generate the image and pyplot, but matlib colors it based on a std heatmap.

I have tried the following just to color all cells as a start:

...

ANSWER

Answered 2022-Mar-08 at 09:50

You can define the way the imshow works. By default, it uses a range of colors called viridis but you can use others. For instance, gray will give you a scale between white for 0 and black for 1. But if you want gray for 1, you need to create your own cmap. See below. It just creates a variation of color that is white for the min value (here 0) and gray for the max value (here 1).

Source https://stackoverflow.com/questions/71349918

QUESTION

Python_LIBRARY in CMake NotFound

Asked 2021-Nov-18 at 20:57

I'm trying to build the open-source software LMGC90 (https://git-xen.lmgc.univ-montp2.fr/lmgc90/lmgc90_user/-/wikis/compilation) and I have a trouble when I try to use the command >cmake. Details are below:

CMake Error: The following variables are used in this project, but they are set to NOTFOUND. Please set them or make sure they are set and tested correctly in the CMake files: PYTHON_LIBRARY

...

ANSWER

Answered 2021-Nov-18 at 20:57

You must specify the path to the Python library as:

Source https://stackoverflow.com/questions/70015338

QUESTION

A simple makefile in C - Object file with different name from C file

Asked 2021-Nov-16 at 04:24

I'm trying to create a makefile for my program (a very simple one). My files are lab.c and lab.h. I need to create object file of lab.c and with a different name (matlib.o), and compile without linkage.

This is my attempt:

...

ANSWER

Answered 2021-Nov-16 at 04:24

You should tell gcc to output the object file in a different name with -o flag.

The correct recipe is

Source https://stackoverflow.com/questions/69970735

QUESTION

could not find function "is.square.matrix"

Asked 2021-Sep-12 at 00:19

I am not able to use is.square.matrix() function for my matrix in R.

...

ANSWER

Answered 2021-Sep-12 at 00:19

is.square.matrix seems to be from matrixcalc package

Source https://stackoverflow.com/questions/69147564

QUESTION

ValueError: x and y must have same first dimension, but have shapes, tkinter and matplotlib problem

Asked 2021-May-07 at 15:44

I've been playing with GUI and matlib for few days now, but I can't find an issue in the code below.

...

ANSWER

Answered 2021-May-07 at 15:44

y = entry1.get() is not enough to convert string to function expression, to say the least. As an option try to use SymPy library with its parse_expr and lambdify methods:

Source https://stackoverflow.com/questions/67434780

QUESTION

C++ copy constructor for a class with an array attribute

Asked 2021-Feb-18 at 20:41

I am creating a matrix template and ran into a problem writing the copy constructor. While data appears to be copied correctly from within the constructor, the object returned to the main program does not have the correct values (looks like its pointing to a different memory address). In my attempts to debug this I tried creating a minimalist example, though strangely this did not produce the same error. I get the sense that this issue is either beyond my understanding of C++ ...or caused by a typo I've somehow missed. Can anyone spot what I've done wrong?

matlib.h

...

ANSWER

Answered 2021-Feb-18 at 20:41

Short Version: Just use std::vector. It will will make your life easier, and has far less pitfalls than a manual approach.

Long Version: You have two major problems in your code:

You are using Flexible-Arrays incorrectly (and this is a compiler extension, not standard C++), and
You are using Variable-Length Arrays incorrectly (and this is also a compiler extension, not standard C++)

1. Flexible Array Members

The first compiler-extension you use is a feature from c called flexible arrays:

Source https://stackoverflow.com/questions/66265267

QUESTION

Solving simultaneous equations/inequalities

Asked 2021-Jan-22 at 09:27

I need to solve a mix of equations/inequalities:

...

ANSWER

Answered 2021-Jan-22 at 09:23

This can be solved using linear programming. There is nothing to optimize, you are just searching for a feasible solution.

Source https://stackoverflow.com/questions/65841855

QUESTION

Problematic for loop conversion from MATLAB to Python

Asked 2020-Dec-10 at 16:31

I am converting some code from MATLAB to Python, and I have encountered an issue I can't resolve. When iterating over the For loop in the section of code, my for loop is spitting out repeated values, that are also incorrect. I believe this has to do with my definition of "x" and "z", but I am not quite Here is my Python script and the matrices D2A1 and D2A2 are giving the repeated blocks of incorrect values.

...

ANSWER

Answered 2020-Dec-10 at 16:31

Fixed. Error was in the definition of matrices to be generated. From what I gather in Python you must specifically define each array, while in MATLAB you can set matrix equivalences and run them through a for-loop.

Source https://stackoverflow.com/questions/65224787

QUESTION

numpy turning matrixes into vectors and combining them

Asked 2020-Dec-04 at 13:30

I have two matricies

...

ANSWER

Answered 2020-Dec-04 at 13:30

Another possible solution:

Source https://stackoverflow.com/questions/65134234

QUESTION

MATLAB conversion to python? Error in python due to shapes of arrays

Asked 2020-Nov-02 at 19:09

Question

I have a Brownian motion vectorized path given below that I am trying to replicate in python. My problem is that one of the functions, highlighted as the first function in yellow is not working. Instead it is giving me an error (operands could not be broadcast together with shapes (1000,499) (500,1000)) due to the dimensions of the two arrays being added.

How can I recreate the array U using python?

The MATLAB code is from An Algorithmic Introduction to Numerical Simulation of stochastic Differential Equations and is not my own code.

MATLAB code

Python attempt not working

...

ANSWER

Answered 2020-Nov-02 at 19:09

You shouldn't need to import and use mb.repmat. That's used in MATLAB because it doesn't do broadcasting (or at least didn't until recently). To add to the (500,1000) shape W, t needs to be (500,), expended to (500,1). I'd suggest using linspace for generating t.

Test:

Source https://stackoverflow.com/questions/64648116

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Vulnerabilities

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Install matlib

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