[GRASS-dev] r.regression.line fix proposal

[Markus Neteler]

Markus Neteler wrote:
> 
> Hi,
> 
> I wonder if this change is reasonable to make the script
> working with FP maps:
> 
> diff -u -r1.17 scripts/r.regression.line
> --- r.regression.line   3 Dec 2007 22:52:43 -0000       1.17
> +++ r.regression.line   3 Dec 2007 22:54:09 -0000
> @@ -90,7 +90,7 @@
> 
> 
>  #calculate regression equation
> -r.stats -c input=$GIS_OPT_MAP1,$GIS_OPT_MAP2  > "$TMP"
> +r.stats -cAN input=$GIS_OPT_MAP1,$GIS_OPT_MAP2  > "$TMP"
>  awk '{tot += $3;sumX +=$1 * $3; sumsqX +=$1*$1*$3;sumY +=$2 * $3; sumsqY
> +=$2*$2*$3;\
>   sumXY +=$1*$2*$3;\
>  }\
> 
> 
> changes:
> -n to suppress no data
> -A to avoid range output for FP maps
> ?
> 

Committed to CVS.

(Un)related question:
Would it be a big mess to implement r.regression.line a C module?

Markus

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