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Unequally spaced ticklabels with the FSC_COLORBAR function [message #86366]

Thu, 31 October 2013 01:49

Karlo Janos
Messages: 31
Registered: July 2008

Member

Hi,

I have found an issue with the FSC_COLORBAR function.
I wondered why the ticklabels were not distributed equally in the given
range in my example (the line with the "levels" variable is taken from
"fsc_colorbar__define.pro"):

IDL> minval = 46.8614502
IDL> maxval = 46.8615112
IDL> divisions = 10
IDL> levels = minval >
(INDGEN(divisions+1)*(maxval-minval)/divisions+minval) < maxval
IDL> pm, levels, FORMAT='(F0.6)'
46.861450
46.861458
46.861462
46.861469
46.861473
46.861481
46.861488
46.861492
46.861500
46.861504
46.861511

The reason is that when I call the function with "divisions" being an
integer the above result occurs. A change to a DOUBLE value yields the
correct result:

IDL> divisions = 10d0
IDL> levels = minval >
(INDGEN(divisions+1)*(maxval-minval)/divisions+minval) < maxval
IDL> pm, levels, FORMAT='(F0.6)'
46.861450
46.861456
46.861462
46.861469
46.861475
46.861481
46.861487
46.861493
46.861499
46.861505
46.861511
IDL>

David, if you are reading this, please consider a floating point
variable for the division by the variable "divisions".

Regards

Karlo

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[Message index]

		Unequally spaced ticklabels with the FSC_COLORBAR function By: Karlo Janos on Thu, 31 October 2013 01:49
		Re: Unequally spaced ticklabels with the FSC_COLORBAR function By: David Fanning on Thu, 31 October 2013 05:11
		Re: Unequally spaced ticklabels with the FSC_COLORBAR function By: Karlo Janos on Thu, 31 October 2013 06:30

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