Function parse #

Parse an expression. Returns a node tree, which can be evaluated by invoking node.eval().

Note the evaluating arbitrary expressions may involve security risks, see http://mathjs.org/docs/expressions/security.html for more information.

Syntax #

math.parse(expr)
math.parse(expr, options)
math.parse([expr1, expr2, expr3, ...])
math.parse([expr1, expr2, expr3, ...], options)

Parameters #

Parameter Type Description
expr string | string[] | Matrix Expression to be parsed
options {nodes: Object<string, Node>} Available options:</br>- nodes a set of custom nodes

Returns #

Type Description
Node | Node[] node

Examples #

const node1 = math.parse('sqrt(3^2 + 4^2)')
node1.compile().eval() // 5

let scope = {a:3, b:4}
const node2 = math.parse('a * b') // 12
const code2 = node2.compile()
code2.eval(scope) // 12
scope.a = 5
code2.eval(scope) // 20

const nodes = math.parse(['a = 3', 'b = 4', 'a * b'])
nodes[2].compile().eval() // 12

See also #

eval, compile

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