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create cor matrix in dplyr summarise

George G answered on November 13, 2022 Popularity 1/10 Helpfulness 1/10

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create cor matrix in dplyr summarise

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library(dplyr)
mtcars %>% 
       group_by(cyl) %>%
       do(data.frame(Cor=t(cor(.[,3:11], .[,3]))))
# A tibble: 3 x 10
# Groups:   cyl [3]
#    cyl Cor.disp Cor.hp Cor.drat Cor.wt Cor.qsec Cor.vs Cor.am Cor.gear Cor.carb
#  <dbl>    <dbl>  <dbl>    <dbl>  <dbl>    <dbl>  <dbl>  <dbl>    <dbl>    <dbl>
#1     4     1.00  0.435  -0.500   0.857    0.328 -0.187 -0.734  -0.0679   0.490 
#2     6     1.00 -0.514  -0.831   0.473    0.789  0.637 -0.637  -0.899   -0.942 
#3     8     1     0.118  -0.0922  0.755    0.195 NA     -0.169  -0.169    0.0615

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Source: stackoverflow.com

Tags: dplyr matrix r

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Contributed on Nov 13 2022

George G

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create cor matrix in dplyr summarise

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library(data.table)
d1 <- copy(mtcars)
setnames(setDT(d1)[, as.list(cor(.SD, .SD[[1]])) , cyl, 
                            .SDcols=3:11],  names(d1)[2:11])[]

Popularity 1/10 Helpfulness 1/10 Language r

Source: stackoverflow.com

Tags: dplyr matrix r

Link to this answer
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Contributed on Nov 13 2022

George G

0 Answers Avg Quality 2/10

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create cor matrix in dplyr summarise

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