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R: Format output of write.table
# example data to write to text file

aa = matrix(c(1000,110,10,1,
              0,2000,20,2,
              30,300,3000,30000), nrow=3, byrow=TRUE,
         dimnames = list(NULL, c("C1", "C2", "C3","C4")))
aa

# left align columns using a tab

write.table(aa,file="c:/users/mark w miller/simple r programs/formatted_tablea.txt", na = 'NA', sep = 't',
row.names = F, col.names = F)

#   1000    110 10  1
#   0   2000    20  2
#   30  300 3000    30000

# increase spacing between columns with two tabs

write.table(aa,file="c:/users/mark w miller/simple r programs/formatted_tableb.txt", na = 'NA', sep = 'tt',
row.names = F, col.names = F)

#   1000        110     10      1
#   0       2000        20      2
#   30      300     3000        30000

# Here is an example of the desired right-aligned output
# format with an intermediate amount of spacing
# (3 spaces vs the 1 or 7 spaces used above):

#   1000    110     10       1
#      0   2000     20       2
#     30    300   3000   30000

# Maybe use cat somehow?

cat(file="c:/users/mark w miller/simple r programs/formatted_tablec.txt", aa, sep=c(' ', ' ', 'n'))

capture.output( print(aa, print.gap=3), file="capture.txt")

         C1     C2     C3      C4
[1,]   1000    110     10       1
[2,]      0   2000     20       2
[3,]     30    300   3000   30000

require(MASS)
write.matrix(aa, file="capturemat.txt", sep="   ")

C1   C2   C3   C4
 1000     110      10       1
    0    2000      20       2
   30     300    3000   30000