Re: [eigen] How can we do in-place calculation for log(x)

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To: eigen <eigen@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [eigen] How can we do in-place calculation for log(x)
From: Gael Guennebaud <gael.guennebaud@xxxxxxxxx>
Date: Thu, 30 Jul 2020 16:30:31 +0200
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Hi,

yes, with "x = x.array().log()" the operation is done inplace, no temporary.

Gaël

On Wed, Jul 29, 2020 at 12:22 AM Hung Dang <hungptit@xxxxxxxxx> wrote:

Hi,

I need to compute x = log(x) in-place, with x can be either a vector or a matrix. This task can be done using either a simple for-loop or x = x.array().log(). The second solution is vectorized, however, I am not sure if it can be done in-place. Is there any better solution?

Regards,
Hung

References:
- [eigen] How can we do in-place calculation for log(x)
  - From: Hung Dang

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