Dear R mailing list!
I would like to import points data in GRASS (with v.in.ascii).
My data includes number written with the scientific notation (for example
1.2e+23).
During the import, I am defining them as double.
Unfortunately, it doesn't work...
I get the following message :
" ERROR: Column 9 defined as double has string values "
Can GRASS actualy deal with number written with scientific notation ?
Is there a specific way to deal with these numbers ?
Many thanks in advance
Jessica
I am not sure if GRASS can read scientific notation on v.in.ascii. Previously I have used something like open office or other spreadsheet program to reformat from SN to decimal. then export as CSV, import into GRASS with v.in.ascii.
On Nov 22, 2007 9:40 AM, <jessica.gervais@tudor.lu> wrote:
Dear R mailing list!
I would like to import points data in GRASS (with v.in.ascii).
My data includes number written with the scientific notation (for example
1.2e+23).
During the import, I am defining them as double.
Unfortunately, it doesn’t work…I get the following message :
" ERROR: Column 9 defined as double has string values "Can GRASS actualy deal with number written with scientific notation ?
Is there a specific way to deal with these numbers ?Many thanks in advance
Jessica
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hi,
2007/11/22, jessica.gervais@tudor.lu <jessica.gervais@tudor.lu>:
I would like to import points data in GRASS (with v.in.ascii).
My data includes number written with the scientific notation (for example
1.2e+23).
During the import, I am defining them as double.
Unfortunately, it doesn't work...I get the following message :
" ERROR: Column 9 defined as double has string values "Can GRASS actualy deal with number written with scientific notation ?
Is there a specific way to deal with these numbers ?
no, it seems, v.in.ascii doesn't support it...
Martin
Many thanks in advance
Jessica
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--
Martin Landa <landa.martin@gmail.com> * http://gama.fsv.cvut.cz/~landa *
jessica.gervais wrote:
Dear R mailing list!
(close enough)
I would like to import points data in GRASS (with v.in.ascii).
My data includes number written with the scientific notation (for example
1.2e+23).
During the import, I am defining them as double.
Unfortunately, it doesn't work...I get the following message :
" ERROR: Column 9 defined as double has string values "Can GRASS actualy deal with number written with scientific notation ?
Is there a specific way to deal with these numbers ?
v.in.ascii coulumn scanning code seems to overlook that case.
There is an open bug report for it not dealing with "nan" and "inf" as doubles
too, http://intevation.de/rt/webrt?serial_num=2763
I'd like to add this issue to that bug report but am not currently in a place
to log into to do that.
I had thought you could over-ride that by specifically defining the column type
with columns="east double, north double, ...", but no luck.
As a work-around you could use a little awk to reformat it, for example:
echo "1.2e23 2.1e21" | awk '{printf("%.0f %.0f\n", $1, $2)}'
Hamish
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