how can i open message key catalog?

how can i open the message catalog in matlab? i am using the sptool.m file in toolbox/signal. in getstring(message('signal:sptprefhelp:Maker')) if i change 'Marker' to 'Markers' it warning:unable to find message key 'Markers' in catalog 'signal:sptprefhelp'. ...so where can i check or find the message keys?

Answer 1

[Walter Roberson]

When you see

message('signal:sptprefhelp:Maker')

then examine the file

fullfile(matlabroot, 'resources', 'signal', 'en', 'sptprefhelp.xml')

It will have a number of entries, such as

<entry key="ByClickingOnACategoryThePanelOnTheRightChangesToReflect">By clicking on a category, the panel on the right changes to reflect the preferences for that category.</entry>

Look for the one for which key=" matches the last component of the message identifier, Maker in the case of your example. So you would be looking for

<entry key="Maker">SOME TEXT HERE</entry>

In R2017b, neither "Maker" or "Marker" appear in that file, but "Markers" does:

<entry key="Markers">Markers</entry>

The 'en' part can instead be 'ja_JP', 'ko_KR' or (sometimes) 'zh_CN' for the messages localized to Japanese, Korean, or Chinese.

[Landers1]

I got it. Thank you very much!

Answer 2

[Steven Lord]

You shouldn't need to access or update the message catalog files.

What exactly did you expect / hope would happen by changing Marker to Markers in that call?

[Landers1]

i am writing my script, and i notice that the 'signal' toolbox has update its code by using 'message',i hope to use 'message' function and know how it works, how can i update my message catalog file. thanks.

[Steven Lord]

You shouldn't need to. If you want to throw an error using an identifier (to allow users of your code to catch a particular error your code throws, for example) call error with two (or more) inputs as shown in the "Throw Error with Formatted Message" example in the documentation.

[Landers1]

Thanks for your suggestion. i will learn to use that.