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How can I add significance to correlation without overlapping between the symbol (*) and the correlation value??
So that it looks like in the picture 
1 answer
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For this, I use the package PerformanceAnalytics. Behold:
PerformanceAnalytics::chart.Correlation(iris[, -5])
Via corrplot it is not possible/would have to do a lot of programming. In that question, they present an option via corrgram but it is not practical in my opinion. If it were to use the corrplot I’d wear something like that:
m.cor <- cor(iris[, -5])
m.sig <- cor.mtest(iris[, -5])$p
corrplot(corr = m.cor, outline = F, p.mat = m.sig, tl.srt = 0,
addCoef.col = "black", method = "square", type = "upper", diag = F, insig = "pch")
Where "X" represents that the coefficient was not different from zero (it was not significant).
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