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Re: [Question #680725]: How to solve the issue 'a float is required' when using the mathfunction log

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Robert Caulk <question680725@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 10 May 2019 07:37:23 -0000
Reply-to: question680725@xxxxxxxxxxxxxxxxxxxxx
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Question #680725 on Yade changed:
https://answers.launchpad.net/yade/+question/680725

    Status: Open => Answered

Robert Caulk proposed the following answer:
Hello,

O.cell.trsf returns the transformation matrix [1]. O.cell.trsf[1], as
you have written, returns a vector from the matrix. The function
math.log() cannot take a vector as an argument. If you are looking for
eyy, I guess you would use O.cell.trsf[1,1] to index the float from the
matrix.

Cheers,

Robert

[1]https://yade-
dev.gitlab.io/trunk/yade.wrapper.html#yade.wrapper.Cell.trsf

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