How to get the data folder of a trace on the top graph?

It's strange that the command TraceInfo(graphNameStr, yWaveNameStr, instance ) doesn't return the YWAVE DataFolder but XWAVEDataFolder.

Function/DF GetTracesDFR(graphName, traceName)
	String graphName		// "" for top graph
	String traceName		// e.g., "wave0" or "wave0#1"
	
	Wave/Z w = TraceNameToWaveRef(graphName, traceName)	
	if (!WaveExists(w))
		return $""			// NULL DFREF
	endif
	DFREF dfr = GetWavesDataFolderDFR(w)
	return dfr
End

Function/S GetTracesDFStr(graphName, traceName, mode)
	String graphName		// "" for top graph
	String traceName		// e.g., "wave0" or "wave0#1"
	Variable mode			// 0: Get data folder name; 1: Get data folder path
	
	DFREF dfr = GetTracesDFR(graphName, traceName)
	if (DataFolderRefStatus(dfr) == 0)
		return ""
	endif
	
	String df = GetDataFolder(mode, dfr)
	return df
End

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hrodstein wrote:

It's strange that the command TraceInfo(graphNameStr, yWaveNameStr, instance ) doesn't return the YWAVE DataFolder but XWAVEDataFolder.

I think that's because you can get the y wave and its data folder through other means (see the first function below), but I agree, it would seem more complete to include this information in the result from TraceInfo.

Here are functions that should work for you.

Function/DF GetTracesDFR(graphName, traceName)
	String graphName		// "" for top graph
	String traceName		// e.g., "wave0" or "wave0#1"
	
	Wave/Z w = TraceNameToWaveRef(graphName, traceName)	
	if (!WaveExists(w))
		return $""			// NULL DFREF
	endif
	DFREF dfr = GetWavesDataFolderDFR(w)
	return dfr
End

Function/S GetTracesDFStr(graphName, traceName, mode)
	String graphName		// "" for top graph
	String traceName		// e.g., "wave0" or "wave0#1"
	Variable mode			// 0: Get data folder name; 1: Get data folder path
	
	DFREF dfr = GetTracesDFR(graphName, traceName)
	if (DataFolderRefStatus(dfr) == 0)
		return ""
	endif
	
	String df = GetDataFolder(mode, dfr)
	return df
End

For information about trace names like "wave0#1", execute this:

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