Errors in running code in vignettes:
when running code in ‘ndtv.Rnw’
  ...

> options(keep.source = TRUE, width = 60)

> foo <- packageDescription("ndtv")

> library(ndtv)
Loading required package: network

‘network’ 1.17.1 (2021-06-12), part of the Statnet Project
* ‘news(package="network")’ for changes since last version
* ‘citation("network")’ for citation information
* ‘https://statnet.org’ for help, support, and other information

Loading required package: networkDynamic

‘networkDynamic’ 0.10.1 (2020-01-16), part of the Statnet Project
* ‘news(package="networkDynamic")’ for changes since last version
* ‘citation("networkDynamic")’ for citation information
* ‘https://statnet.org’ for help, support, and other information

Loading required package: animation
Loading required package: sna
Loading required package: statnet.common

Attaching package: ‘statnet.common’

The following objects are masked from ‘package:base’:

    attr, order

sna: Tools for Social Network Analysis
Version 2.6 created on 2020-10-5.
copyright (c) 2005, Carter T. Butts, University of California-Irvine
 For citation information, type citation("sna").
 Type help(package="sna") to get started.


‘ndtv’ 0.13.0 (2019-05-21), part of the Statnet Project
* ‘news(package="ndtv")’ for changes since last version
* ‘citation("ndtv")’ for citation information
* ‘https://statnet.org’ for help, support, and other information


> wheel <- network.initialize(10)

> add.edges.active(wheel, tail = 1:9, head = c(2:9, 
+     1), onset = 1:9, terminus = 11)

> add.edges.active(wheel, tail = 10, head = c(1:9), 
+     onset = 10, terminus = 12)

> plot(wheel)

> render.animation(wheel)
No slice.par found, using
slice parameters:
  start:1
  end:12
  interval:1
  aggregate.dur:1
  rule:latest

Calculating layout for network slice from time  1 to 2
Calculating layout for network slice from time  2 to 3
Calculating layout for network slice from time  3 to 4
Calculating layout for network slice from time  4 to 5
Calculating layout for network slice from time  5 to 6
Calculating layout for network slice from time  6 to 7
Calculating layout for network slice from time  7 to 8
Calculating layout for network slice from time  8 to 9
Calculating layout for network slice from time  9 to 10
Calculating layout for network slice from time  10 to 11
Calculating layout for network slice from time  11 to 12
Calculating layout for network slice from time  12 to 13
rendering 10 frames for slice 0
rendering 10 frames for slice 1
rendering 10 frames for slice 2
rendering 10 frames for slice 3
rendering 10 frames for slice 4
rendering 10 frames for slice 5
rendering 10 frames for slice 6
rendering 10 frames for slice 7
rendering 10 frames for slice 8
rendering 10 frames for slice 9
rendering 10 frames for slice 10
rendering 10 frames for slice 11

> ani.replay()

> plot(wheel, displaylabels = TRUE)

> plot(wheel, displaylabels = TRUE)

> require(ndtv)

> require(tergm)
Loading required package: tergm
Warning in library(package, lib.loc = lib.loc, character.only = TRUE, logical.return = TRUE,  :
  there is no package called ‘tergm’

> data("florentine")
Warning in data("florentine") : data set ‘florentine’ not found

> plot(flobusiness, displaylabels = TRUE)

  When sourcing ‘ndtv.R’:
Error: object 'flobusiness' not found
Execution halted

  ‘ndtv.Rnw’... failed