Thematic maps point by ranges

[Alejandro Flores Compean]

good afternoon, I have this problem, well not if a problem, but it looks like that is wrong, in a map by ranges put some custom ranges, and put the 0-0, 1-4, 5-8 and 9-13 , but when I create the theme map gray appears some say I have 4 and 8, but I put it within the ranges

[ICW Keith]

I am not exactly sure why you are getting gray points.  however I tool a look at the way ranges are set.  The bottom of the range is set <= where the top of the range is <.  in other words. 4 is not <4 and 8 is not <8.  If the upper part of the range were treated the same as the bottom(<= and >=) then there would be no question that 4<=4 and 8>=8.  perhaps if the top of the first range was 4.5 and the second range 8.5 you would not get the grays.  I did not spend much time studying the behavior of the thematic ranges, but this is just an observation.  So MapInfo appears to treat the objects that have attributes equal to the top of the range as a gray area(no pun intended).

[Peter H]

Hi alejandro,

thematic ranges work on the lower value as being >= and the upper
limit value being <
The way your ranges are set, it won't map values of 4 or 8(or
potentially 13) If you change your range values to
0-0
1-4
4-8
8-14
you will find the 530 grey records should be incorporated into the
thematic styles
I am assuming there are no fraction in your values.

P
On Nov 1, 4:25 am, Alejandro Flores Compean <alflo...@terra.com.mx>
wrote:

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