R - Array data loop selection
On Feb 4, 2012, at 8:29 PM, dengyu19901102 wrote:
i want to select June, July and August data from the 3D array (`ssta_sst`, 360*180*362). the loop works but the output of ssta_winter has the identical values for `ssta_winter[,,i]`.seen below. I have set it up as an array of (360,180,29). I think the problem is the variable `temp`, i want to define it as an array first but i don't know what size it should be (360,180,3) or (360,180,3*29) and how to keep a loop counter in `temp` when it passes down to finding mean stage?
You need to post the results of str(ssta_sst)
ssta_winter = array( data=NA, dim = c(360,180,29))
temp = array( data=NA, dim = c(360,180,3))
for (yr in 1982:2010) {
temp <- ssta_sst[,,year_sst==yr & (month_sst>=6 & month_sst<=8)]
# As a devugging step you could run this for one of two years and
insert:
print(str(temp))
# to make sure you are not having problems with that assignment
#--
#David.
for (i in 1:360) {
for (j in 1:180) {
ssta_winter[i,j,] <- mean(temp[i,j,])
}
}
}
for (i in 1:29){
+ print(ssta_winter[180,166,i]) + } [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 [1] 0.2222583 -- View this message in context: http://r.789695.n4.nabble.com/R-Array-data-loop-selection-tp4358282p4358282.html Sent from the R help mailing list archive at Nabble.com.
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