<html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body> I have been looking at what would be needed to support charts using a logarithm axis with a base different from 10. It is already supported by the LogarithmicScaling object and using the API it is already possible to generate a chart with a log axis in a different base, so it is only lacking the configuration UI and read/write files. I have two questions about it: <ol> <li>It seems there is currently no explicit support in ODF, but it is coming in ODF 1.4: I saw a discussion regarding this in <a class="moz-txt-link-freetext" href="https://issues.oasis-open.org/browse/OFFICE-3936">https://issues.oasis-open.org/browse/OFFICE-3936</a>, but I am not sure about the expected behavior and the key part has been converted to a smiley. Is the idea to write "log(2)" or "0.30102999566398114" for the interval-major attribute? The second is what is already possible and done today (see for example <a class="moz-txt-link-freetext" href="https://askubuntu.com/questions/1105001/libreoffice-x-axis-log2">https://askubuntu.com/questions/1105001/libreoffice-x-axis-log2</a>), but if we want a nicer UI and offer to configure "2" or "10" or whatever, does it mean we need to check if the interval-major value looks like the log of an integer? </li> <li>Regarding Office Open XML, it is supported and LibreOffice does retrieve a value mofLogBase in oox, but I did not find how to create a LogarithmicScaling with an argument to provide the base (or modify it once created). The object is created today with "LogarithmicScaling::create( comphelper::getProcessComponentContext() );", how can I pass an argument on top of it?</li> </ol> Regards, Leyan </body> </html>