The data.table has a nice feature that suppresses output to the head and tail of the table.
Is it possible to view / print more than 100 rows at once?
library(data.table)
## Convert the ubiquitous "iris" data to a data.table
dtIris = as.data.table(iris)
## Printing 100 rows is possible
dtIris[1:100, ]
## Printing 101 rows is truncated
dtIris[1:101, ]
I often have data.table results that are somewhat large (e.g. 200 rows) that I just want to view.
The print method of data.table has an argument nrows:
args(data.table:::print.data.table)
function (x, nrows = 100L, digits = NULL, ...)
You can use this to control how many rows get printed:
print(dtIris, nrow=105)
.....
99: 5.1 2.5 3.0 1.1 versicolor
100: 5.7 2.8 4.1 1.3 versicolor
101: 6.3 3.3 6.0 2.5 virginica
102: 5.8 2.7 5.1 1.9 virginica
103: 7.1 3.0 5.9 2.1 virginica
104: 6.3 2.9 5.6 1.8 virginica
105: 6.5 3.0 5.8 2.2 virginica
Sepal.Length Sepal.Width Petal.Length Petal.Width Species
View() (as in View(iris) or View(dtIris[1:120,])) doesn't truncate data.tables, and can often be nicer than printing/spewing out a data.* to the console.
To print the top 60 and bottom 60 lines (default is top 5 and bottom 5):
print(dtIris, topn = 60)
A messy option, but you could always export it into excel to view it with excels convenience.
library(xlsReadWrite)
write.xls(mydata, "c:/mydata.xls")
You could convert it to a data.frame only for printing:
iris_dt = as.data.table(iris)
print(as.data.frame(iris_dt))
来源：https://stackoverflow.com/questions/12162657/possible-to-print-more-than-100-rows-of-a-data-table