On Wed, Jan 07, 2015 at 09:13:12PM +0000, Moriceau, Julien wrote:
> I applied your methods which worked well. I was importing a .txt file
> with 3 rows (XYZ).
OK, for a vendor file file format we could improve the undefined value
handling but for raw text you are on your own...
> I was wondering if it was possible to save a file with the same
> organization as my original file, meaning XYZ (in case of I want to
> reopen it later with Excel for example), because .gwy is not really
> convenient.
This should not be a big problem to add. Gwyddion can export (apart
from VTK which purely is for visualisation) data to this xyz format
http://gwyddion.net/documentation/user-guide-en/gxyzf.html
It is still binary though, so no luck loading it to MS Excel.
> Because after modification I tried to save it (with the "save as"
> command) in .txt but what I obtained was weird. I guess because I
> saved pixels of the picture and not the original value XYZ.
Well, yes, it is saved as a value matrix – this is the normal
representation of raster data (used in all software I know).
Representing data on a regular grid as XYZ throws away the implicit
geometrical information and multiplies the data size by 3 for no good
reason. On the other hand, if you really have a general point cloud
then Gwyddion may not be the right tool since it works with raster data.
Regards,
Yeti
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