error for using igraph library: 'edges' must be numeric or character
They are probably factors in a data frame. Use str() on your data (a data frame?) to find out. If you have not already done so, please spend some time with an R tutorial or two to learn about factors and, in particular how read.csv(), read.table(), etc. will cause this to happen, how you can prevent it, and how to use ?as.character to convert from factor to character. A search (e.g. at rseek.org) on something like "R factor or character" will also probably bring up relevant info. Cheers, Bert Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Sun, Jun 18, 2017 at 12:39 AM, Zahra Tofighi <tofighizahra at gmail.com> wrote:
hello, i want to use igraph for drawing graph of my data. First time i try
do it and it was successful. but now i want to test again i got this error:
"edges must be numeric or character". this is my edge list(this is output
from R):
From To
1 US20100331312
2 US20100331341
3 US20100330919 US20100041339
4 US20100330919 US20100195590
5 US20100330919 US20110170512
6 US20100330919 US20110312368
7 US20100330919 US20110021152
8 US20100330919 US20110026376
9 US20100330919 US20110028097
10 US20100330919 US20110028098
11 US20100330919 US20110028100
12 US20100330919 US20110028107
13 US20100330919 US20120083303
14 US20100330919 US20120100883
15 US20100330919 US20140038659
16 US20100330919 US20140162715
17 US20100330919 US20150049721
18 US20100330919 US20150257156
I'm sure they are character. what's my wrong?
with Regard,
[[alternative HTML version deleted]]
______________________________________________ R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.