[R] sum each row and output results

[Rheannon]

Hello,

I have the following data frame (DF):
  
          V5        V5.1        V5.2       V5.3       V5.4       V5.5
2  -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
3  -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
4  -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
5  -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
6  -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
7  -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
8  -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
9  -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
10 -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
11 -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183

I would like to sum each row and output the results to another dataframe
(Results).
The resluts would be 
Results[1] <- sum(DF[1])

When I try this i get:
Error in FUN(X[[1L]], ...) : 
  only defined on a data frame with all numeric variables

I have also tried 
apply(AFDDsec,1,sum)
Error in FUN(newX[, i], ...) : invalid 'type' (character) of argument

What am I doing wrong?
Eventually I would like to do this with a dataframe that has 44 columns and
5329 rows.

Cheers,
R
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