i'm starting deal with R, and i face this problem: i prepared a data table on excel then export as a CSV on R i use the formula read.csv2 after i set the data frame tryinf to exlude the first column with the name of the country.

i would like to plot and do the PC analisys but i'm stuck in the non-numerical argument problem. how can i handle it? or find a possible non-numerical factor? the error is:

pairs(dati) Error in pairs.default(dati) : non-numeric argument to 'pairs'

update:

str(dati) 'data.frame': 184 obs. of 6 variables: $ Political Stability and Absence of Violence/Terrorism: chr "1.17" "-2.41" "-2.06" "-0.33" ... $ Government Effectiveness : chr "1.41" "-2.18" "-0.86" "-0.69" ... $ Voice and Accountability : chr "1.56" "-1.91" "-1.58" "-0.65" ... $ Rule of Law : chr "1.16" "-1.79" "-1.63" "-0.68" ... $ Regulatory Quality : chr "1.27" "-2.09" "-1.42" "-0.47" ... $ Control of Corruption : chr "1.32" "-1.29" "-1.17" "-0.89" ...

CodePudding user response：

pairs is failing because your data frame only has character columns.

We can try fixing this using type.convert() which will convert all the character columns to the appropriate class.

dati2 <- type.convert(dati, as.is = TRUE)

pairs(dati2)