Public
Edited
May 29, 2023
mat.import({
index: math.factory('hi', [], math.index)
}, {override:true})
test3 = math.factory('hi', [math.index], math.index)
test3.
A = [10, 20, 30, 40]
select = [false, true, true, false]
m.evaluate(`
A = [10, 20, 30, 40]
# A>20
# A[[false, true]]
# A[[true, false, true, false]]
`)
test = math.typed(
{
'...Array': (x) => x,
'...number': (x) => math.add(2,x)
}
)
test2 = (...x1) => x1.map(
math.typed('hi',
{
'Array': (x) => x,
'number': (x) => math.add(2,x)
}
)
)
[1,2].map(x=>x)
test2(1, [1], 2+2)
test([1],[1],[1])
test(1,1,1)
convertBooleanIndex(select)
mat.index([1,2])
mat.index(select)
math.index(convertBooleanIndex(select))
mat.subset(A, mat.index(select))
math.subset(A, math.index([1,2]))
math.subset(A, math.index(convertBooleanIndex(select)))
isBooleanIndex = math.typed(
// checks if all elements in an index are boolean
{
'Array': index => index.every(e => math.isBoolean(e)),
'any': () => false
}
)
convertBooleanIndex = math.typed(
{
// converts [true, false, true, false] to [0,2]
'Array': (x) => math.filter(math.range(0, x.length), (e, i) => x[i]).toArray()
}
)
[true, false, true].map()
mat = {
let mat = math.create()
mat.import({
index: math.typed({
'...Array': (index) => math.index(isBooleanIndex(index) ? convertBooleanIndex(index) : index),
})
},{override:true})
return mat
}
m = mat.parser()
math = require("mathjs")
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Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
