How to replace data in an existing XML file?

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Mark Golberg 2022-6-16

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https://ww2.mathworks.cn/matlabcentral/answers/1742085-how-to-replace-data-in-an-existing-xml-file

评论： Geoff Hayes 2022-6-17

xml_append_question.jpg

Hi,

I have an XML file. It looks like in the attached pic.

As you can see, in action Name "m1" there are 2 cols: "fish_1" & "fish_2".

I also have a list with new col names: "moose_42" , "moose_7" , "moose_19"

I'd like to replace the existing list (2 col names) with the new list (3 col names). I know how to "dive" into action "m1" and replace attributes values. But because it's 3 new vs. 2 existing, I'd need to add one NEW node. How this can be done?

Also, what if in my new list there is only 1 name, then how can I DELETE the second node?

THANKS !!!

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Geoff Hayes 2022-6-17

@Mark Golberg - yeah, that isn't all that clear on how to easily manipulate the xml object. You may want to consider, from the File Exchange, xml2struct and then struct2xml. You could perhaps manipulate the struct to add the new data (or remove the old) and then write back to the xml file. I think that would be easier.