stacked bar plot in R gives error

I am trying to process a survey, I have Q1A to Q1H with answers of Q1 which I want to compare in a stacked barplot in R. All of them contain integer data (categorical).

When I run:

counts <- table(Q1A, Q1B, Q1C, Q1D, Q1E, Q1F, Q1G)
barplot(counts, main="Motivations for research",
col=c('blue', 'green', 'red', 'orange', 'purple', 'yellow', 'grey'),
legend = rownames(counts))

I get:

 Error in.... 'height' must be a vector or a matrix

What am I doing wrong? is this easier to do with ggplot2?


output of dput for Q1A and Q1B is here.


Not really sure what your bar plot is supposed to look like, so I have a couple examples for you. I'm also using the ggplot2, plyr, & combine packages


q <- combine(q1a, q1b)
qSum <- count(q)

ggplot(qSum, aes(x = data, y = freq, fill = `source`)) +
  geom_bar(stat = 'identity')

ggplot(qSum, aes(x = data, y = freq)) +
  geom_bar(stat = 'identity') +
  facet_grid(`source` ~ .)

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