I like to write a r-function to create 100 shape files in a loop.I
have three data files. Each file has 100 data fields (like sim1, sim2,
sim3sim100) with a unique ID fields (Thana_ID). First I want to
create 100 data frame from these files and then merge or join each of
this 100 files
Hi Zia,
There are two methods were you can work: the for statement and the tapply
function.
First, take a good look on these: ?for and ?tapply
You can try something like this:
for (i in 1:100)
sim-cbind(THANA_ID=thana$THANA_ID, logWAS=was$[,i],
logGAs=gas$[,i],logTotal=total$[,i])
sim.shp -
For constructing sim1:n you could probably use mapply. The second part of
inserting the data into your read-in shapefiles could possibly be done
using sapply.
HTH,
Roman
On Mon, Mar 12, 2012 at 2:53 PM, Zia Ahmed z...@cornell.edu wrote:
I like to write a r-function to create 100 shape files
Ops! Take off the $ on this line
sim-cbind(THANA_ID=thana$THANA_ID, logWAS=was$[,i],
logGAs=gas$[,i],logTotal=total$[,i])
This mus be:
sim-cbind(THANA_ID=thana$THANA_ID, logWAS=was[,i],
logGAs=gas[,i],logTotal=total[,i])
On Mon, Mar 12, 2012 at 11:13 AM, Raphael Saldanha
I have tried your code, but it create only one shape file (sim100.shp).
Thanks
Zia
for (i in 1:100)
sim-cbind(THANA_ID=thana$THANA_ID, logWAS=was[,i],
logGAs=gas[,i],logTotal=total[,i])
sim.shp - thana
sim.shp@data - merge(thana@data,sim,by.x=THANA_ID,by.y=THANA_ID,
all.x=T, sort=F)
