Add scale bar for plotting ppp object

up vote
0
down vote

favorite

I would like to add a scale bar to plots of spatstat objects but am not sure how.

Here is a reproducible example:

Plot ppp object called "cells":

data(cells)

plot(cells)

cells

How would I add a scale bar to this plot?

asked Nov 10 at 16:38

Carrie Perkins

263

Please consider upvoting and/or accepting an answer if it solves your problem or explain what is missing.
– Ege Rubak
2 days ago

add a comment |

up vote
0
down vote

favorite

I would like to add a scale bar to plots of spatstat objects but am not sure how.

Here is a reproducible example:

Plot ppp object called "cells":

data(cells)

plot(cells)

cells

How would I add a scale bar to this plot?

asked Nov 10 at 16:38

Carrie Perkins

263

Please consider upvoting and/or accepting an answer if it solves your problem or explain what is missing.
– Ege Rubak
2 days ago

add a comment |

up vote
0
down vote

favorite

I would like to add a scale bar to plots of spatstat objects but am not sure how.

Here is a reproducible example:

Plot ppp object called "cells":

data(cells)

plot(cells)

cells

How would I add a scale bar to this plot?

asked Nov 10 at 16:38

Carrie Perkins

263

I would like to add a scale bar to plots of spatstat objects but am not sure how.

Here is a reproducible example:

Plot ppp object called "cells":

data(cells)

plot(cells)

cells

How would I add a scale bar to this plot?

sp spatstat

asked Nov 10 at 16:38

Carrie Perkins

263

asked Nov 10 at 16:38

Carrie Perkins

263

asked Nov 10 at 16:38

Carrie Perkins

263

asked Nov 10 at 16:38

Carrie Perkins

263

asked Nov 10 at 16:38

Carrie Perkins

263

Please consider upvoting and/or accepting an answer if it solves your problem or explain what is missing.
– Ege Rubak
2 days ago

add a comment |

Please consider upvoting and/or accepting an answer if it solves your problem or explain what is missing.
– Ege Rubak
2 days ago

Please consider upvoting and/or accepting an answer if it solves your problem or explain what is missing.
– Ege Rubak
2 days ago

add a comment |

1 Answer
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0
down vote

I just Googled 'spatstat scale bar' and the second hit was the help file for yardstick() while the top hit concerned the plot method for the yard stick. The title of the help file is "yardstick: Text, Arrow or Scale Bar in a Diagram". Maybe that is what you are looking for.

E.g:

library(spatstat)

W <- union.owin(owin(c(0,1),c(0,5)), owin(c(0,5),c(4,5)))

X <- runifpoint(100, win = W)

plot(X, main = "")

y <- yardstick(3,1,4,1, txt = "1 unit")

plot(y, add = TRUE)

^{Created on 2018-11-11 by the reprex package (v0.2.1)}

edited Nov 11 at 21:49

answered Nov 11 at 1:14

Ege Rubak

1,7791511

Thank you very much for your suggestion. Yes, i did look into yardstick, but am not sure how to use it for my real data. The window in my real data is very narrow and as far as I understand, it seems that the yardstick will have to be placed at coordinates within the window itself, where there isn't really any free space. I am looking for a way to put a scale bar outside of the window.
– Carrie Perkins
Nov 11 at 2:45

The coordinates of the observation window follow the bounding box of the rectangle. See my update for an example where a stick is plotted outside the window, but inside the bounding box (frame).
– Ege Rubak
Nov 11 at 21:51

add a comment |

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1 Answer
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1 Answer
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active

oldest

votes

up vote
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E.g:

library(spatstat)

W <- union.owin(owin(c(0,1),c(0,5)), owin(c(0,5),c(4,5)))

X <- runifpoint(100, win = W)

plot(X, main = "")

y <- yardstick(3,1,4,1, txt = "1 unit")

plot(y, add = TRUE)

^{Created on 2018-11-11 by the reprex package (v0.2.1)}

edited Nov 11 at 21:49

answered Nov 11 at 1:14

Ege Rubak

1,7791511

Thank you very much for your suggestion. Yes, i did look into yardstick, but am not sure how to use it for my real data. The window in my real data is very narrow and as far as I understand, it seems that the yardstick will have to be placed at coordinates within the window itself, where there isn't really any free space. I am looking for a way to put a scale bar outside of the window.
– Carrie Perkins
Nov 11 at 2:45

The coordinates of the observation window follow the bounding box of the rectangle. See my update for an example where a stick is plotted outside the window, but inside the bounding box (frame).
– Ege Rubak
Nov 11 at 21:51

add a comment |

up vote
0
down vote

E.g:

library(spatstat)

W <- union.owin(owin(c(0,1),c(0,5)), owin(c(0,5),c(4,5)))

X <- runifpoint(100, win = W)

plot(X, main = "")

y <- yardstick(3,1,4,1, txt = "1 unit")

plot(y, add = TRUE)

^{Created on 2018-11-11 by the reprex package (v0.2.1)}

edited Nov 11 at 21:49

answered Nov 11 at 1:14

Ege Rubak

1,7791511

Thank you very much for your suggestion. Yes, i did look into yardstick, but am not sure how to use it for my real data. The window in my real data is very narrow and as far as I understand, it seems that the yardstick will have to be placed at coordinates within the window itself, where there isn't really any free space. I am looking for a way to put a scale bar outside of the window.
– Carrie Perkins
Nov 11 at 2:45

The coordinates of the observation window follow the bounding box of the rectangle. See my update for an example where a stick is plotted outside the window, but inside the bounding box (frame).
– Ege Rubak
Nov 11 at 21:51

add a comment |

up vote
0
down vote

E.g:

library(spatstat)

W <- union.owin(owin(c(0,1),c(0,5)), owin(c(0,5),c(4,5)))

X <- runifpoint(100, win = W)

plot(X, main = "")

y <- yardstick(3,1,4,1, txt = "1 unit")

plot(y, add = TRUE)

^{Created on 2018-11-11 by the reprex package (v0.2.1)}

edited Nov 11 at 21:49

answered Nov 11 at 1:14

Ege Rubak

1,7791511

E.g:

library(spatstat)

W <- union.owin(owin(c(0,1),c(0,5)), owin(c(0,5),c(4,5)))

X <- runifpoint(100, win = W)

plot(X, main = "")

y <- yardstick(3,1,4,1, txt = "1 unit")

plot(y, add = TRUE)

^{Created on 2018-11-11 by the reprex package (v0.2.1)}

edited Nov 11 at 21:49

answered Nov 11 at 1:14

Ege Rubak

1,7791511

edited Nov 11 at 21:49

answered Nov 11 at 1:14

Ege Rubak

1,7791511

answered Nov 11 at 1:14

Ege Rubak

1,7791511

answered Nov 11 at 1:14

Ege Rubak

1,7791511

Thank you very much for your suggestion. Yes, i did look into yardstick, but am not sure how to use it for my real data. The window in my real data is very narrow and as far as I understand, it seems that the yardstick will have to be placed at coordinates within the window itself, where there isn't really any free space. I am looking for a way to put a scale bar outside of the window.
– Carrie Perkins
Nov 11 at 2:45

The coordinates of the observation window follow the bounding box of the rectangle. See my update for an example where a stick is plotted outside the window, but inside the bounding box (frame).
– Ege Rubak
Nov 11 at 21:51

add a comment |

Thank you very much for your suggestion. Yes, i did look into yardstick, but am not sure how to use it for my real data. The window in my real data is very narrow and as far as I understand, it seems that the yardstick will have to be placed at coordinates within the window itself, where there isn't really any free space. I am looking for a way to put a scale bar outside of the window.
– Carrie Perkins
Nov 11 at 2:45

The coordinates of the observation window follow the bounding box of the rectangle. See my update for an example where a stick is plotted outside the window, but inside the bounding box (frame).
– Ege Rubak
Nov 11 at 21:51

Thank you very much for your suggestion. Yes, i did look into yardstick, but am not sure how to use it for my real data. The window in my real data is very narrow and as far as I understand, it seems that the yardstick will have to be placed at coordinates within the window itself, where there isn't really any free space. I am looking for a way to put a scale bar outside of the window.
– Carrie Perkins
Nov 11 at 2:45

The coordinates of the observation window follow the bounding box of the rectangle. See my update for an example where a stick is plotted outside the window, but inside the bounding box (frame).
– Ege Rubak
Nov 11 at 21:51

add a comment |

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