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spex-xray / spex-help

These are the help and manual pages for the SPEX X-ray spectral fitting package.
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How do we use three additive components simultaneously when using the “comp rel” command? #41

Closed TaoWu666 closed 6 months ago

TaoWu666 commented 6 months ago

Hi Jelle,

I have had a problem recently. I want to add 3 additive components simultaneously with the "comp rel" command, such as "comp rel 1:2:3 5,6,4". But this was told that it was not allowed.

Cheers,

Tao.

jdeplaa commented 6 months ago

Hi Tao,

Given your example, you can provide a range of additive components in SPEX. You can write the command like this:

comp rel 1:3 5,6,4

The ':' is an indicator in the SPEX syntax that the two numbers given are a range, so 1:2:3 does not work. The syntax 1:3 implicitly means 1, 2 and 3.

You can also have a case where the additive components are not loaded in sequence. In that case, you can give multiple comp rel commands:

com rel 1 2
com rel 3 2,4

where component 1 and 3 are additive, and 2 and 4 multiplicative. So here you define the relations for each additive component individually.

Cheers,

Jelle.

TaoWu666 commented 6 months ago

Hi Jelle,

I have got it. Thank you for your help!

Cheers,

Tao.