Export plot data from R to Excel - r

Question

I have this plot which i generate it from this code:
m <- bcea(e=effects,c=costs, ref=2, interventions=treatments, Kmax=50000)
The plot is:
evi.plot(m)
Now, i need to export this evpi.plot(m) in an excel file, not the jpeg created, but the data along with it, i mean what created the X and Y axis.
I've been using something like this but it's not for this case
write.table( thresholds, 'clipboard', sep='\t', row.names=FALSE, col.names=FALSE )

Answer 1

In the documentation for function bcea from package BCEA you can see the structure of your object:
Value
An object of the class "bcea" containing the following elements
n.sim Number of simulations produced by the Bayesian model
n.comparators Number of interventions being analysed
...
k
The vector of values for the grid approximation of the willingness to pay
...
evi The vector of values for the Expected Value of Information, as a
function of the willingness to pay
And if you look at the function definition of evi.plot you will see that your x and y-values are the elements named k and evi:
> evi.plot
function (he)
{
options(scipen = 10)
plot(he$k, he$evi, t = "l", xlab = "Willingness to pay",
ylab = "EVPI", main = "Expected Value of Information")
if (length(he$kstar) > 0) {
points(rep(he$kstar, 3), c(-10000, he$evi[he$k == he$kstar]/2,
he$evi[he$k == he$kstar]), t = "l", lty = 2, col = "dark grey")
points(c(-10000, he$kstar/2, he$kstar), rep(he$evi[he$k ==
he$kstar], 3), t = "l", lty = 2, col = "dark grey")
}
}
<environment: namespace:BCEA>
So:
res <- cbind(m$k, m$evi)
write.table(res, file="bcea.csv", sep=',', row.names=FALSE, col.names=FALSE )