How to set a default line size in a ggplot2 theme (ggtheme)?

I forked the ggthemes git repo to make my own custom theme. I've figured out how to do almost everything I need, but have one hang up.

I am specifically trying to set the default size for geom_line() in my ggtheme.

Where I'm at now, I have to do something like this:

economics %>%

    ggplot(aes(date, uempmed)) +

    geom_line(size = 1.75) +

    theme_mycustomtheme()

When I would prefer to just have to do this:

economics %>%

    ggplot(aes(date, uempmed)) +

    geom_line() +

    theme_mycustomtheme() # this would set the line size automatically

I have edited my mycustomtheme.R file like so:

theme(

    # Elements in this first block aren't used directly, but are inherited

    # by others

    line =               element_line(

      color = "black", size = 1.75,

      linetype = 1, lineend = "butt"

    )

Note how the size is now set to 1.75. But it doesn't seem to make a difference when I call the theme in practice.

I would appreciate any pointers as to what I may be doing wrong. Thanks!

edited Nov 21 '18 at 22:43

asked Nov 21 '18 at 18:12

Adhi R.

355

Pretty sure theme doesn't control that - the "line" argument in theme controls the various other .line arguments within it, not lines created by geom_line()

– iod
Nov 21 '18 at 18:20

I would think that one would need to have theme_mycustomtheme <- theme(...) in the .R file. Otherwise loading it wouldn't have any effect. And you may need to invoke ?theme_update to get more information.

– 42-
Nov 21 '18 at 18:22

add a comment |

I forked the ggthemes git repo to make my own custom theme. I've figured out how to do almost everything I need, but have one hang up.

I am specifically trying to set the default size for geom_line() in my ggtheme.

Where I'm at now, I have to do something like this:

economics %>%

    ggplot(aes(date, uempmed)) +

    geom_line(size = 1.75) +

    theme_mycustomtheme()

When I would prefer to just have to do this:

economics %>%

    ggplot(aes(date, uempmed)) +

    geom_line() +

    theme_mycustomtheme() # this would set the line size automatically

I have edited my mycustomtheme.R file like so:

theme(

    # Elements in this first block aren't used directly, but are inherited

    # by others

    line =               element_line(

      color = "black", size = 1.75,

      linetype = 1, lineend = "butt"

    )

Note how the size is now set to 1.75. But it doesn't seem to make a difference when I call the theme in practice.

I would appreciate any pointers as to what I may be doing wrong. Thanks!

edited Nov 21 '18 at 22:43

asked Nov 21 '18 at 18:12

Adhi R.

355

Pretty sure theme doesn't control that - the "line" argument in theme controls the various other .line arguments within it, not lines created by geom_line()

– iod
Nov 21 '18 at 18:20

I would think that one would need to have theme_mycustomtheme <- theme(...) in the .R file. Otherwise loading it wouldn't have any effect. And you may need to invoke ?theme_update to get more information.

– 42-
Nov 21 '18 at 18:22

add a comment |

I forked the ggthemes git repo to make my own custom theme. I've figured out how to do almost everything I need, but have one hang up.

I am specifically trying to set the default size for geom_line() in my ggtheme.

Where I'm at now, I have to do something like this:

economics %>%

    ggplot(aes(date, uempmed)) +

    geom_line(size = 1.75) +

    theme_mycustomtheme()

When I would prefer to just have to do this:

economics %>%

    ggplot(aes(date, uempmed)) +

    geom_line() +

    theme_mycustomtheme() # this would set the line size automatically

I have edited my mycustomtheme.R file like so:

theme(

    # Elements in this first block aren't used directly, but are inherited

    # by others

    line =               element_line(

      color = "black", size = 1.75,

      linetype = 1, lineend = "butt"

    )

Note how the size is now set to 1.75. But it doesn't seem to make a difference when I call the theme in practice.

I would appreciate any pointers as to what I may be doing wrong. Thanks!

edited Nov 21 '18 at 22:43

asked Nov 21 '18 at 18:12

Adhi R.

355

I forked the ggthemes git repo to make my own custom theme. I've figured out how to do almost everything I need, but have one hang up.

I am specifically trying to set the default size for geom_line() in my ggtheme.

Where I'm at now, I have to do something like this:

economics %>%

    ggplot(aes(date, uempmed)) +

    geom_line(size = 1.75) +

    theme_mycustomtheme()

When I would prefer to just have to do this:

economics %>%

    ggplot(aes(date, uempmed)) +

    geom_line() +

    theme_mycustomtheme() # this would set the line size automatically

I have edited my mycustomtheme.R file like so:

theme(

    # Elements in this first block aren't used directly, but are inherited

    # by others

    line =               element_line(

      color = "black", size = 1.75,

      linetype = 1, lineend = "butt"

    )

Note how the size is now set to 1.75. But it doesn't seem to make a difference when I call the theme in practice.

I would appreciate any pointers as to what I may be doing wrong. Thanks!

r ggplot2

edited Nov 21 '18 at 22:43

asked Nov 21 '18 at 18:12

Adhi R.

355

edited Nov 21 '18 at 22:43

asked Nov 21 '18 at 18:12

Adhi R.

355

edited Nov 21 '18 at 22:43

asked Nov 21 '18 at 18:12

Adhi R.

355

asked Nov 21 '18 at 18:12

Adhi R.

355

asked Nov 21 '18 at 18:12

Adhi R.

355

Pretty sure theme doesn't control that - the "line" argument in theme controls the various other .line arguments within it, not lines created by geom_line()

– iod
Nov 21 '18 at 18:20

I would think that one would need to have theme_mycustomtheme <- theme(...) in the .R file. Otherwise loading it wouldn't have any effect. And you may need to invoke ?theme_update to get more information.

– 42-
Nov 21 '18 at 18:22

add a comment |

Pretty sure theme doesn't control that - the "line" argument in theme controls the various other .line arguments within it, not lines created by geom_line()

– iod
Nov 21 '18 at 18:20

I would think that one would need to have theme_mycustomtheme <- theme(...) in the .R file. Otherwise loading it wouldn't have any effect. And you may need to invoke ?theme_update to get more information.

– 42-
Nov 21 '18 at 18:22

Pretty sure theme doesn't control that - the "line" argument in theme controls the various other .line arguments within it, not lines created by geom_line()

– iod
Nov 21 '18 at 18:20

I would think that one would need to have theme_mycustomtheme <- theme(...) in the .R file. Otherwise loading it wouldn't have any effect. And you may need to invoke ?theme_update to get more information.

– 42-
Nov 21 '18 at 18:22

add a comment |

1 Answer
1

active

oldest

votes

themes don't affect lines in geoms, only lines in axes, gridlines, etc. But, you can change the default appearance of geoms using update_geom_defaults().

#specify geom to update, and list attibutes you want to change appearance of

update_geom_defaults("line", list(size = 1.75))



#now your graph will plot with the line size you defined as default

economics %>%

  ggplot(aes(date, uempmed)) +

  geom_line()

If you add update_geom_defaults("line", list(size = 1.75)) to the file where you store your custom theme, your geom defaults will also update when you source() your mycustomtheme.r file, and you'll get the linetype you want. Note that setting defaults this way only changes the exact geom specified (line), and does not affect line elements in other geoms (boxplot borders, error bars, etc.), so you will need to define geom defaults for each individual geom you plan to use.

answered Nov 21 '18 at 18:37

Jan Boyer

1,0352714

Ah interesting, thanks! Confusing how line and rect don't refer to geoms. The end user is installing my fork of ggthemes though, not source()ing it. Is there a way to have that update either when someone calls library(ggthemes) or theme_mycustomtheme()? Basically I want to make it as easy as possible for the end-user to use and a way of baking in update_geom_defaults() would be really ace!

– Adhi R.
Nov 21 '18 at 22:38

The way ggplot2 works, the aesthetics for geoms are separate from themes. Themes only handle the way the non-data/background aspects of the plot are rendered. Also, there's no reason to fork ggthemes to create a new theme. I suggest creating a new package with the theme for your users to install.

– jrnold
Nov 22 '18 at 19:19

add a comment |

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themes don't affect lines in geoms, only lines in axes, gridlines, etc. But, you can change the default appearance of geoms using update_geom_defaults().

#specify geom to update, and list attibutes you want to change appearance of

update_geom_defaults("line", list(size = 1.75))



#now your graph will plot with the line size you defined as default

economics %>%

  ggplot(aes(date, uempmed)) +

  geom_line()

answered Nov 21 '18 at 18:37

Jan Boyer

1,0352714

Ah interesting, thanks! Confusing how line and rect don't refer to geoms. The end user is installing my fork of ggthemes though, not source()ing it. Is there a way to have that update either when someone calls library(ggthemes) or theme_mycustomtheme()? Basically I want to make it as easy as possible for the end-user to use and a way of baking in update_geom_defaults() would be really ace!

– Adhi R.
Nov 21 '18 at 22:38

The way ggplot2 works, the aesthetics for geoms are separate from themes. Themes only handle the way the non-data/background aspects of the plot are rendered. Also, there's no reason to fork ggthemes to create a new theme. I suggest creating a new package with the theme for your users to install.

– jrnold
Nov 22 '18 at 19:19

add a comment |

themes don't affect lines in geoms, only lines in axes, gridlines, etc. But, you can change the default appearance of geoms using update_geom_defaults().

#specify geom to update, and list attibutes you want to change appearance of

update_geom_defaults("line", list(size = 1.75))



#now your graph will plot with the line size you defined as default

economics %>%

  ggplot(aes(date, uempmed)) +

  geom_line()

answered Nov 21 '18 at 18:37

Jan Boyer

1,0352714

Ah interesting, thanks! Confusing how line and rect don't refer to geoms. The end user is installing my fork of ggthemes though, not source()ing it. Is there a way to have that update either when someone calls library(ggthemes) or theme_mycustomtheme()? Basically I want to make it as easy as possible for the end-user to use and a way of baking in update_geom_defaults() would be really ace!

– Adhi R.
Nov 21 '18 at 22:38

The way ggplot2 works, the aesthetics for geoms are separate from themes. Themes only handle the way the non-data/background aspects of the plot are rendered. Also, there's no reason to fork ggthemes to create a new theme. I suggest creating a new package with the theme for your users to install.

– jrnold
Nov 22 '18 at 19:19

add a comment |

themes don't affect lines in geoms, only lines in axes, gridlines, etc. But, you can change the default appearance of geoms using update_geom_defaults().

#specify geom to update, and list attibutes you want to change appearance of

update_geom_defaults("line", list(size = 1.75))



#now your graph will plot with the line size you defined as default

economics %>%

  ggplot(aes(date, uempmed)) +

  geom_line()

answered Nov 21 '18 at 18:37

Jan Boyer

1,0352714

themes don't affect lines in geoms, only lines in axes, gridlines, etc. But, you can change the default appearance of geoms using update_geom_defaults().

#specify geom to update, and list attibutes you want to change appearance of

update_geom_defaults("line", list(size = 1.75))



#now your graph will plot with the line size you defined as default

economics %>%

  ggplot(aes(date, uempmed)) +

  geom_line()

answered Nov 21 '18 at 18:37

Jan Boyer

1,0352714

answered Nov 21 '18 at 18:37

Jan Boyer

1,0352714

answered Nov 21 '18 at 18:37

Jan Boyer

1,0352714

answered Nov 21 '18 at 18:37

Jan Boyer

1,0352714

Ah interesting, thanks! Confusing how line and rect don't refer to geoms. The end user is installing my fork of ggthemes though, not source()ing it. Is there a way to have that update either when someone calls library(ggthemes) or theme_mycustomtheme()? Basically I want to make it as easy as possible for the end-user to use and a way of baking in update_geom_defaults() would be really ace!

– Adhi R.
Nov 21 '18 at 22:38

The way ggplot2 works, the aesthetics for geoms are separate from themes. Themes only handle the way the non-data/background aspects of the plot are rendered. Also, there's no reason to fork ggthemes to create a new theme. I suggest creating a new package with the theme for your users to install.

– jrnold
Nov 22 '18 at 19:19

add a comment |

Ah interesting, thanks! Confusing how line and rect don't refer to geoms. The end user is installing my fork of ggthemes though, not source()ing it. Is there a way to have that update either when someone calls library(ggthemes) or theme_mycustomtheme()? Basically I want to make it as easy as possible for the end-user to use and a way of baking in update_geom_defaults() would be really ace!

– Adhi R.
Nov 21 '18 at 22:38

The way ggplot2 works, the aesthetics for geoms are separate from themes. Themes only handle the way the non-data/background aspects of the plot are rendered. Also, there's no reason to fork ggthemes to create a new theme. I suggest creating a new package with the theme for your users to install.

– jrnold
Nov 22 '18 at 19:19

Ah interesting, thanks! Confusing how line and rect don't refer to geoms. The end user is installing my fork of ggthemes though, not source()ing it. Is there a way to have that update either when someone calls library(ggthemes) or theme_mycustomtheme()? Basically I want to make it as easy as possible for the end-user to use and a way of baking in update_geom_defaults() would be really ace!

– Adhi R.
Nov 21 '18 at 22:38

The way ggplot2 works, the aesthetics for geoms are separate from themes. Themes only handle the way the non-data/background aspects of the plot are rendered. Also, there's no reason to fork ggthemes to create a new theme. I suggest creating a new package with the theme for your users to install.

– jrnold
Nov 22 '18 at 19:19

add a comment |

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