nan error

[Pritam Chhetri]

Using r.covar in processing toolbox in QGIS I calculated the multi-colinearity of raster data (environmental data), I got the result but in some places it has written nan. Why is it so?

[Andy Tice]

Either your Gran lives there...or those cells don't contain data.

Check the inputs, and set a missing data value (typically something like -9999).

On Wed, 11 Aug. 2021, 7:16 pm Pritam Chhetri, <prit...@gmail.com> wrote:

Using r.covar in processing toolbox in QGIS I calculated the multi-colinearity of raster data (environmental data), I got the result but in some places it has written nan. Why is it so?

--
You received this message because you are subscribed to the Google Groups "QGIS Australia User Group" group.
To unsubscribe from this group and stop receiving emails from it, send an email to australian-qgis-use...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/australian-qgis-user-group/3d2a3760-87f7-4f49-bc24-2b4594170583n%40googlegroups.com.

[Pritam Chhetri]

Sir, I didn't actually get you.  how to check that and how to put the missing value? I mean where?

[Andy Tice]

Looking at the documentation

https://grass.osgeo.org/grass43/manuals/html_grass4/html/r.covar.html

Shows that NaN values are a product of missing data or 0s.

The output is telling you it cannot calculate for those cells because of that.

Nan is also a colloquial term for Grandmother...sorry about the joke.

To view this discussion on the web, visit https://groups.google.com/d/msgid/australian-qgis-user-group/a882f21a-bace-4f08-af2f-b18023eeeb69n%40googlegroups.com.