Demo of numas.js is avaible via browser console

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Examples

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Simple arithmetic

                            

let a = numas.NDArray.new([1, 2, 3, 4], [2, 2])
let b = numas.factory.ones([2, 2])
let c = a.add(b)
console.log(c.collect())

// It's also possible to use broadcasting for array of length one
let u = numas.NDArray.new([10], [1])
let z = a.mul(u)
console.log(z.collect())
                            
                        

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Using views

                            
  
let long = numas.NDArray.new([1,2,3,4,5,6,7,8,9], [3, 3])
//create view array 'long' pointing to first row, second and third column
let view = long.get([0, [1, 3]]) 
console.log(view.collect())      // View contains [2, 3]
console.log(long.collect())

let short = numas.factory.ones([2])
view.addAssign(short)           // Add to view without creating new array
console.log(view.collect())     // View now contains [3, 4]
console.log(long.collect())     // Addition to view is reflected into it's "parent"
                            
                        

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Avaible methods

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Factory

ones(shape, datatype = 'i32')
zeros(shape, datatype = 'i32')
zeroes(shape, datatype = 'i32')
full(value, shape, datatype = 'i32')

logspace(start, stop, base, num)
linspace(start, stop, num)
arange(start, stop, step)     
                        

NDArray

new(data, shape, datatype = 'i32')

Instance of NDArray

• General

reshape()
shape()
collect()
get(indices)
set(value, indices)
free()
type()
len()
baseLen()
clone()
view()

• Arithmetic

add(other)
addAssign(other)
sub(other)
subAssign(other)
mul(other)
mulAssign(other)
div(other)
divAssign(other)

• Relational

eq(other)
neq(other)
lt(other)
gt(other)
le(other)
ge(other)

• Trigonometric

sin()
cos()
tan()
arcsin()
arccos()
arctan()
degrees()
radians() 
rad2deg()
deg2rad()

• Hyperbolic

sinh()
cosh()
tanh()
arcsinh()
arccosh()
arctanh()

• Misc

sqrt()

• Logarithm

loge()
log2() 
log10()
log(base)

• Reducers

sum()
prod()

• Rounding

round(base)
floor(base)
ceil(base)
trunc(base)