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Expression.sub
substitute
Substitutes a given value with another given value.
Usage: nerdamer(expression).sub(value, for_value)
Parameters
|
String
value
|
The value being substituted. |
|
String
for_value
|
The value to substitute for. |
Returns
Expression
var x = nerdamer('3*(x+1)^3+8*(x+1)^2+u').sub('x+1', 'u');
console.log(x.toString());
x = nerdamer('cos(x)*tan(x)').sub('tan(x)', 'sin(x)/cos(x)').evaluate()
console.log(x.toString());
//one more
x = nerdamer('(x+1)*cos(x+1)').sub('x+1', 'u');
console.log(x.toString());