CODEWITHSUNDEEP
octave
jiji
jiji

Reputation: 13

expand log on Octave

I am trying to expand log expression with octave like that:

expand(log(x^2))

to get 2 * log(x)

but that doesn't work That works with matlab when making:

expand(log(x^2),'IgnoreAnalyticConstraints',true)

but octave doesn't recognise it.

Any idea how to make it with octave?

Upvotes: 1

Views: 76

Answers (1)

Tasos Papastylianou
Tasos Papastylianou

Reputation: 22245

You need to specify that x is a positive variable first.

pkg load symbolic
x = sym('x', 'positive' );
expand( log( x ^ 2 ) )      % ans = (sym) 2⋅log(x)

Upvotes: 1

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