ggtheme also accepts objects of 'theme' type

[IndrajeetPatil]

Minor changes

1. Documentation roxygenized with the new version of roxygen2.
2. All code styled with the tidyverse guidelines using styler package.

Major changes
The function now works with ggtheme argument of either function or theme type.

Example

library(ggcorrplot)
#> Loading required package: ggplot2

# Compute a correlation matrix
data(mtcars)
corr <- round(cor(mtcars), 1)
corr
#>       mpg  cyl disp   hp drat   wt qsec   vs   am gear carb
#> mpg   1.0 -0.9 -0.8 -0.8  0.7 -0.9  0.4  0.7  0.6  0.5 -0.6
#> cyl  -0.9  1.0  0.9  0.8 -0.7  0.8 -0.6 -0.8 -0.5 -0.5  0.5
#> disp -0.8  0.9  1.0  0.8 -0.7  0.9 -0.4 -0.7 -0.6 -0.6  0.4
#> hp   -0.8  0.8  0.8  1.0 -0.4  0.7 -0.7 -0.7 -0.2 -0.1  0.7
#> drat  0.7 -0.7 -0.7 -0.4  1.0 -0.7  0.1  0.4  0.7  0.7 -0.1
#> wt   -0.9  0.8  0.9  0.7 -0.7  1.0 -0.2 -0.6 -0.7 -0.6  0.4
#> qsec  0.4 -0.6 -0.4 -0.7  0.1 -0.2  1.0  0.7 -0.2 -0.2 -0.7
#> vs    0.7 -0.8 -0.7 -0.7  0.4 -0.6  0.7  1.0  0.2  0.2 -0.6
#> am    0.6 -0.5 -0.6 -0.2  0.7 -0.7 -0.2  0.2  1.0  0.8  0.1
#> gear  0.5 -0.5 -0.6 -0.1  0.7 -0.6 -0.2  0.2  0.8  1.0  0.3
#> carb -0.6  0.5  0.4  0.7 -0.1  0.4 -0.7 -0.6  0.1  0.3  1.0

# Compute a matrix of correlation p-values
p.mat <- cor_pmat(mtcars)
p.mat
#>               mpg          cyl         disp           hp         drat
#> mpg  0.000000e+00 6.112687e-10 9.380327e-10 1.787835e-07 1.776240e-05
#> cyl  6.112687e-10 0.000000e+00 1.802838e-12 3.477861e-09 8.244636e-06
#> disp 9.380327e-10 1.802838e-12 0.000000e+00 7.142679e-08 5.282022e-06
#> hp   1.787835e-07 3.477861e-09 7.142679e-08 0.000000e+00 9.988772e-03
#> drat 1.776240e-05 8.244636e-06 5.282022e-06 9.988772e-03 0.000000e+00
#> wt   1.293959e-10 1.217567e-07 1.222320e-11 4.145827e-05 4.784260e-06
#> qsec 1.708199e-02 3.660533e-04 1.314404e-02 5.766253e-06 6.195826e-01
#> vs   3.415937e-05 1.843018e-08 5.235012e-06 2.940896e-06 1.167553e-02
#> am   2.850207e-04 2.151207e-03 3.662114e-04 1.798309e-01 4.726790e-06
#> gear 5.400948e-03 4.173297e-03 9.635921e-04 4.930119e-01 8.360110e-06
#> carb 1.084446e-03 1.942340e-03 2.526789e-02 7.827810e-07 6.211834e-01
#>                wt         qsec           vs           am         gear
#> mpg  1.293959e-10 1.708199e-02 3.415937e-05 2.850207e-04 5.400948e-03
#> cyl  1.217567e-07 3.660533e-04 1.843018e-08 2.151207e-03 4.173297e-03
#> disp 1.222320e-11 1.314404e-02 5.235012e-06 3.662114e-04 9.635921e-04
#> hp   4.145827e-05 5.766253e-06 2.940896e-06 1.798309e-01 4.930119e-01
#> drat 4.784260e-06 6.195826e-01 1.167553e-02 4.726790e-06 8.360110e-06
#> wt   0.000000e+00 3.388683e-01 9.798492e-04 1.125440e-05 4.586601e-04
#> qsec 3.388683e-01 0.000000e+00 1.029669e-06 2.056621e-01 2.425344e-01
#> vs   9.798492e-04 1.029669e-06 0.000000e+00 3.570439e-01 2.579439e-01
#> am   1.125440e-05 2.056621e-01 3.570439e-01 0.000000e+00 5.834043e-08
#> gear 4.586601e-04 2.425344e-01 2.579439e-01 5.834043e-08 0.000000e+00
#> carb 1.463861e-02 4.536949e-05 6.670496e-04 7.544526e-01 1.290291e-01
#>              carb
#> mpg  1.084446e-03
#> cyl  1.942340e-03
#> disp 2.526789e-02
#> hp   7.827810e-07
#> drat 6.211834e-01
#> wt   1.463861e-02
#> qsec 4.536949e-05
#> vs   6.670496e-04
#> am   7.544526e-01
#> gear 1.290291e-01
#> carb 0.000000e+00

# with ggtheme of type `function`
ggcorrplot(corr, method = "circle", ggtheme = ggplot2::theme_bw)

# with ggtheme of type `theme`
ggcorrplot(corr, method = "circle", ggtheme = ggplot2::theme_dark())

Created on 2018-08-28 by the reprex package (v0.2.0.9000).

Rationale

This was done to make it compatible with my function ggstatsplot::ggcorrmat (https://github.com/IndrajeetPatil/ggstatsplot/blob/master/R/ggcorrmat.R), which is a wrapper around ggcorrplot. All functions in my package have the argument ggtheme, but I force users to enter a theme and not a function class object. So, out of the need for consistency across functions in a single package, I also wanted ggcorrmat to behave the same way, which is possible only if the underlying function (ggcorrplot::ggcorrplot) was modified.

[kassambara]

thank you for your contribution!!

[IndrajeetPatil]

@kassambara Thanks for merging! Do you have any plans to push the current development version to CRAN any time soon?

[kassambara]

The plan is to submit it next week...

[IndrajeetPatil]

Hi @kassambara

I am guessing you couldn't submit the package to CRAN because they had stopped accepting submission during holidays. They are accepting submissions again. Do you plan to submit the next release this week?

Trying to plan next release for my package accordingly.