Category plots: a serious limitation in Igor Pro?

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Hello,

I am facing serious limitation in Igor pro. I have data points on the y-axis going from -15 to 5. The category plot can only be plotted growing up from zero and hence my column is inversed. I tried every single way to try to plot a column growing upwards from -15 to 5 but failed.
Any suggestion?

Kind regards,
Katy
Here is an example. Note that the idea that the column grows from (e.g. -15 to ~-7). You could argue that we could reverse the y-axis but that will leads to illogical order of the y-axis. So I wished to have the circled black symbol sitting at the top of the column not at its bottom?

I think the problem is to do with that the base line of category plots is always set to positive number or zero but negative values are not possible! A real challenge!


Thanks
Katy
Graph0_4.png (43.52 KB) Graph0_4.png (43.52 KB) Graph0_4.png (43.52 KB)

December 16, 2012 at 05:39 pm - Permalink
Would this do what you want?


categories		data		minus15	
	a		-6.5		-15
	b		-8		-15
	c		-9		-15
	d		-11		-15
	e		-7.5		-15
	f		-7		-15

Window categoryFromMinus15() : Graph
	PauseUpdate; Silent 1		// building window...
	Display /W=(39,273.5,433.5,487.25) data,minus15 vs categories
	ModifyGraph mode(minus15)=2
	ModifyGraph toMode(data)=1,toMode(minus15)=2
	SetAxis left -15,0
EndMacro

--Jim Prouty
Software Engineer, WaveMetrics, Inc.
categoryFromMinus15.png (3.14 KB)

December 16, 2012 at 08:56 pm - Permalink
Here's another way to do it. Like Jim's this requires some trickery:

Make/O/T categories2 = {"a","b","c","d","e","f"}
Make/O data2 ={-6.5+15, -8+15, -9+15, -11+15, -7.5+15, -7+15}	// Original data plus 15
Display data2 vs categories2
ModifyGraph offset={0,-15}
SetAxis left, -15, 0

December 16, 2012 at 11:39 pm - Permalink