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<p class=MsoPlainText><span lang=EN-US>Thanks for all help<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US>I wish two subtract two column of my
shapefile but It look like a impossible operation with R:<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l0 level1 lfo1'><![if !supportLists]><span class=apple-style-span><span
lang=EN-US><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>
</span></span></span></span><![endif]><span lang=EN-US>In SAGA+R module: “T</span><span
class=apple-style-span><span lang=EN-US style='font-size:10.0pt;font-family:
"Arial","sans-serif";color:black'>able calculator for shapes", It runs but
doesn’t save the result (there is bug)</span></span><span
class=apple-style-span><span lang=EN-US><o:p></o:p></span></span></p>
<p class=MsoPlainText style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l0 level1 lfo1'><![if !supportLists]><span lang=EN-US><span style='mso-list:
Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
class=apple-style-span><span lang=EN-US style='font-size:10.0pt;font-family:
"Arial","sans-serif";color:black'> I can’t use </span></span><span
lang=EN-US>software “GeoDa” because It works only in Windows xp and
not in Windows Vista<o:p></o:p></span></p>
<p class=MsoPlainText style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l0 level1 lfo1'><![if !supportLists]><span class=apple-style-span><span
lang=EN-US><span style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'>
</span></span></span></span><![endif]><span class=apple-style-span><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Library
maptools go down for a memory problems</span></span><span
class=apple-style-span><span lang=EN-US><o:p></o:p></span></span></p>
<p class=MsoPlainText style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l0 level1 lfo1'><![if !supportLists]><span lang=EN-US><span style='mso-list:
Ignore'>4.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
lang=EN-US>library(rgdal) give an empty column<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US>is there suggestion? please.<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US>I attach a </span><span
class=apple-style-span><span lang=EN-US style='font-size:9.0pt;font-family:
"Arial","sans-serif";color:black'>small part of my data-set for <o:p></o:p></span></span></p>
<p class=MsoPlainText><span class=apple-style-span><span lang=EN-US
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></span></p>
<p class=MsoPlainText><span class=apple-style-span><span lang=EN-US
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'>Thanks for
Help and suggestion</span></span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US>library(maptools)<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US>my_SPDF <- readShapeSpatial("theme1.shp")
<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US>my_SPDF$ab <- my_SPDF$a - my_SPDF$b <o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US>writeSpatialShape(my_SPDF,
"mynewfile")<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US>or:<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US>library(rgdal)<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US>my_SPDF <- readOGR(".",
"theme1")<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US>my_SPDF$ab <- my_SPDF$a - my_SPDF$b<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US>writeOGR(my_SPDF, ".",
"mynewfile", driver="ESRI Shapefile")<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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