Make the spacing between the tick marks equal without changing the explicit tick mark values.

Hi everyone,

I have a frequency-wave number spectrum. In which the X axis is wave
number(-4 to 4) and Y axis frequecy. The Y axis frequency values are
explicitly defined.
My Y axis values are (/0.01, 0.0125, 0.016666667, 0.025, 0.05, 0.1/). So
when we go from bottom to top, obviously the spacing between the tick marks
increases. That is quite clear. In the plot, I want to make the spacing
between each tick mark to be equal without changing the above tick mark
values( i.e. extent the bottom and compress the top of plot)
 Is there any resources or method in NCL so that I can make the spacing
between the tick marks equal (By using the above values)

Any help is highly appreciated..
sabeer

the plotting part is given below.

wks = gsn_open_wks("eps", "freq_spec_new2")
gsn_define_colormap(wks,"prcp_2")
res=True
res@cnFillOn=True
res@gsnSpreadColors=True
NW=4
fMin=-0.5
fMax=0.5
WORK2=pow2({-NW:NW},{0:fMax})
izero=ind(WORK2&freq.eq.0.0)
WORK2(:,izero) = min(WORK2)
res@tmYLMode = "Explicit" ; explicit labels
pltPeriods = (/10,20,40,60,80,100/)
res@tmYLValues = 1./pltPeriods ; freq location labels (/0.01,
0.0125, 0.016666667, 0.025, 0.05, 0.1/).
res@tmYLLabels = pltPeriods ; labels themselves
  res@tmLabelAutoStride = True ; nice stride on labels
  res@tiXAxisOffsetYF = 0.2

plot = gsn_csm_contour(wks,WORK2(freq|:,wave|:),res)
end

-- 
**********************************
Sabeerali
Climate and Global Modeling Division
Indian Institute of Tropical Meteorology
Pashan, Pune, 411 008
****************************************

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Received on Fri Jul 2 04:24:11 2010