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Labeling logarithmic axes [message #92734]

Thu, 18 February 2016 17:16

laura.hike
Messages: 87
Registered: September 2013

Member

Hi,

I can't find anything recent about this problem, so....

I am making a line plot and would like to use a logarithmic y-axis. So far so good. I use

pavgsw = plot(merraaswhr,merrap,color='red',thick=2,name='MERRA2',yra nge = [1000,100],ylog=1)

I get a nice plot with a log axis BUT only the 1000 and 100 tick marks are labeled. I would like to label 500 and 200 as well. Doug Fanning has a nice discussion of this at http://www.idlcoyote.com/graphics_tips/minorlog.html, however, the information seems to be outdated (or at least the keywords aren't recognized under the new graphics system). I tried a variety of options based on his method, like defining

axislabels = ['1000', '','','','','500','','','200','100']

then adding

pavgsw.ytickname = axislabels with or without pavgsw.ymajor = 9

(or doing the same with key words in the original plot statement).

The problem is that as soon as I add the ytickname option, the tick marks go back to linear spacing. Does anyone know how to fix this? I should point out that the plotted lines are not affected by the changes to the axis, only the axis markings are.

Thanks much,

Laura H.

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[Message index]

		Labeling logarithmic axes By: laura.hike on Thu, 18 February 2016 17:16
		Re: Labeling logarithmic axes By: Phillip Bitzer on Sat, 27 February 2016 11:50
		Re: Labeling logarithmic axes By: laura.hike on Wed, 02 March 2016 12:18
		Re: Labeling logarithmic axes By: laura.hike on Wed, 02 March 2016 12:25

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