Changing output-complex-root turns to italic

[csrabak]

As per present manual, if the output-complex-root is changed, even to the default "i", instead of keeping the \mathrm format, it changes to italic.

Is there a means of put a "j" and have it upright, perhaps [output-complex-root = \mathrm{j}] ?

[josephwright]

Er, yes, you get exactly the literal set here, so for upright-j you need \mathrm{j}: the standard value of \mathrm{i} hopefully shows the pattern.

[csrabak]

OK, I would not expect, but I understand the mechanics so OK.
I was educated that 'e', the imaginary 'i' or 'j', where always "upright" exactly to avoid confusion to with variables which are expected to be typeset in italic, as a rule.

Thanks.

[josephwright]

OK, I would not expect, but I understand the mechanics so OK. I was educated that 'e', the imaginary 'i' or 'j', where always "upright" exactly to avoid confusion to with variables which are expected to be typeset in italic, as a rule.

There are different traditions here: pure mathematicians tend to use italic, physicists and engineers upright. There is no 'right' answer here, so siunitx simply users math mode and expects the user to make their own decision.