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Description:

matrix2d

Matrix 2D 🧮 #

With Matrix 2D, you can perform matrix operations such as addition, subtraction, and multiplication in Dart. It is a simple and easy-to-use library inspired by Python's NumPy library.
Operations #

addition(listA,listB) returns array of sums of corresponding elements of listA and listB of any dimensions.

subtraction(listA,listB) returns array of differences of corresponding elements of listA and listB of any dimensions.

division(listA,listB) divides listA by listB and returns new array

dot(listA,listB) Function returns the dot product of two arrays. For 2-D vectors, it is the equivalent to matrix multiplication. For 1-D arrays, it is the inner product of the vectors. For N-dimensional arrays, it is a sum product over the last axis of a and the second-last axis of b.

shape(list) returns dimensions of input array if the array is uniform or error otherwise.

flatten(list) returns 1-D representation of any shape and any levels of nesting of list array.

transpose(list) Reverse the axes of an array and returns the modified array

arange(start, stop, steps) returns evenly spaced values within the half-open interval [start, stop) with optional steps argument.

zeros(row,cols) Return a new array of given shape and type, with zeros

ones(row,cols) Return a new array of given shape and type, with ones

sum(list) Function returns the sum of array elements

reshape(list)Reshaping means changing the shape of an array.

diagonal(list) To find a diagonal element from a given matrix and gives output as one dimensional matrix.

fill(row,cols,object) Just like zeros() and ones this function will return a new array of given shape, with given object(anything btw strings too)

compareobject(list,operation,obj) compare values inside an array with given object and operations. function will return a new boolen array (this function is deprecated in favor of compare)

concatenate(listA,listB,{axis}) Concatenation refers to joining. This function is used to join two arrays of the same shape along a specified axis. The function takes the following parameters.Axis along which arrays have to be joined. Default is 0

min(list,{axis}) Functions, used to find the minimum value for any given array

max(list,{axis}) Functions, used to find the maximum value for any given array

slice(list (List<List>), row_index [start, stop*], column_index [start, stop*]*) Function used to slice two-dimensional arrays . (column_index and stop not required )

reverse(list,{axis}) Function used to reverse the array along the given axis. The function takes the following parameters.Axis along which the array is to be flipped. Default is 0

Examples #
shape
List list = [[1, 2],[1, 2]];
print(list.shape);
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ouput:
[2,2]
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flatten
List list = [[1, 2],[1, 2]];
print(list.flatten);
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ouput:
[1,2,1,2]
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transpose
List list = [[1, 2],[1, 2]];
print(list.transpose);
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ouput:
[[1,1],[2,2]]
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addition
List list1 = [[1, 1],[1, 1]];
List list2 = [[2, 2],[2, 2]];
var addition = m2d.addition(list1,list2);
print(addition);
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ouput:
[[3,3],[3,3]]
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subtraction
List list1 = [[1, 1],[1, 1]];
List list2 = [[2, 2],[2, 2]];
var subtraction = m2d.subtraction(list1,list2);
print(subtraction);
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ouput:
[[-1,-1],[-1,-1]]
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division
List list1 = [[1, 1],[1, 1]];
List list2 = [[2, 2],[0, 2]];
var division = m2d.subtraction(division,list2);
print(division);
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ouput:
[[0.5,Infinity],[0.5,0.5]]
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dot operation
List list1 = [[1,2],[3,4]];
List list2 = [[11,12],[13,14]];
var dot = m2d.dot(division,list2);
print(dot);
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ouput:
[[37, 40], [85, 92]]
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arange
var arange = m2d.arange(8);
print(arange);
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ouput:
[[0,1,2,3,4,5,6,7,8]]
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sum
var list = [[2,2],[2,2]];
var sum = m2d.sum(list);
print(sum);
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ouput:
8
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reshape
List list = [[0, 1, 2, 3, 4, 5, 6, 7]];
list = list.reshape(2,4);
print(list);
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ouput:
[[0, 1, 2, 3], [4, 5, 6, 7]]
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linspace
var linspace = m2d.linspace(2, 3, 5);
print(linspace);
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ouput:
[2.0, 2.25, 2.5, 2.75, 3.0]
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diagonal
List list = [[1,1,1],[2,2,2],[3,3,3]];
print(list.diagonal);
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ouput:
[1,2,3]
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compare
var list = [[1,1,1],[2,2,2],[3,3,3]];
var compare = m2d.compare(list,'>',2);
print(compare);
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ouput:
[[false, false, false], [false, false, false], [true, true, true]]
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concatenate
axis 0
final l1 = [
[1, 1, 1],
[1, 1, 1],
[1, 1, 1]
];
final l2 = [
[0, 0, 0],
[0, 0, 0],
[0, 0, 0],
[0, 0, 0],
];
final l3 = m2d.concatenate(l1, l2);
print(l3);
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ouput:
[[1, 1, 1],
[1, 1, 1],
[1, 1, 1],
[0, 0, 0],
[0, 0, 0],
[0, 0, 0],
[0, 0, 0]]
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axis 1
final a1 = [
[1, 1, 1, 1],
[1, 1, 1, 1],
[1, 1, 1, 1]
];
final a2 = [
[0, 0, 0, 0, 0,0, 0, 0, 0, 0],
[0, 0, 0, 0, 0,0, 0, 0, 0, 0],
[0, 0, 0, 0, 0,0, 0, 0, 0, 0]
];

final a3 = m2d.concatenate(a2, a1, axis: 1);
print(a3);
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ouput:
[[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1],
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1],
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1]]
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zeros,ones and fill
var zeros = m2d.zeros(2,2);
print(zeros);

var ones = m2d.ones(2,2);
print(ones);

var anything = m2d.fill(2,2,'i love dart');
print(anything);
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ouput:
[[0,0],[1,1]]

[[1,1],[1,1]]

[['i love dart','i love dart'],['i love dart','i love dart']]
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min max
final numbers = [
[1, 2, 3],
[4, 5, 6],
[7, 8, 9]
];
print(numbers.min());
print(numbers.min(axis: 1));
print(numbers.min(axis: 0));
print(numbers.max());
print(numbers.max(axis: 1));
print(numbers.max(axis: 0));
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ouput:
[1]

[1, 4, 7]

[1, 2, 3]

[9]

[3, 6, 9]

[7, 8, 9]
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slice

var sliceArray = [
[1, 2, 3, 4, 5],
[6, 7, 8, 9, 10]
];

var newArray = m2d.slice(sliceArray, [0, 2], [1, 4]);
print(newArray);

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ouput:
[[2, 3, 4],[7, 8, 9]]
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Contribution #
If you want to contribute to this project, you are always welcome! Just make a pull request and I will review it as soon as possible.
Features and bugs #
If you have any problems or suggestions, please open an issue here.