Convert raster to im object

up vote
0
down vote

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I would like to convert a raster to an im object but have so far been unable to do so.

Here is a reproducible example:

Create raster layer and add data to it:

r.toy <- raster(ncol=40, nrow=20)
r.toy <- rnorm(n=ncell(r.toy))

Plot the raster:

plot(r.toy)

raster

Convert to image:

r.toy.im <- as.im(r.toy)

I receive the following error:

Error in as.im.default(r.toy) : Can't convert X to a pixel image

asked Nov 10 at 23:48

Carrie Perkins

425

add a comment |

up vote
0
down vote

favorite

I would like to convert a raster to an im object but have so far been unable to do so.

Here is a reproducible example:

Create raster layer and add data to it:

r.toy <- raster(ncol=40, nrow=20)
r.toy <- rnorm(n=ncell(r.toy))

Plot the raster:

plot(r.toy)

raster

Convert to image:

r.toy.im <- as.im(r.toy)

I receive the following error:

Error in as.im.default(r.toy) : Can't convert X to a pixel image

asked Nov 10 at 23:48

Carrie Perkins

425

add a comment |

up vote
0
down vote

favorite

I would like to convert a raster to an im object but have so far been unable to do so.

Here is a reproducible example:

Create raster layer and add data to it:

r.toy <- raster(ncol=40, nrow=20)
r.toy <- rnorm(n=ncell(r.toy))

Plot the raster:

plot(r.toy)

raster

Convert to image:

r.toy.im <- as.im(r.toy)

I receive the following error:

Error in as.im.default(r.toy) : Can't convert X to a pixel image

asked Nov 10 at 23:48

Carrie Perkins

425

I would like to convert a raster to an im object but have so far been unable to do so.

Here is a reproducible example:

Create raster layer and add data to it:

r.toy <- raster(ncol=40, nrow=20)
r.toy <- rnorm(n=ncell(r.toy))

Plot the raster:

plot(r.toy)

raster

Convert to image:

r.toy.im <- as.im(r.toy)

I receive the following error:

Error in as.im.default(r.toy) : Can't convert X to a pixel image

raster spatstat

asked Nov 10 at 23:48

Carrie Perkins

425

asked Nov 10 at 23:48

Carrie Perkins

425

asked Nov 10 at 23:48

Carrie Perkins

425

asked Nov 10 at 23:48

Carrie Perkins

425

asked Nov 10 at 23:48

Carrie Perkins

425

add a comment |

1 Answer
1

active

oldest

votes

up vote
1
down vote

accepted

You just need to load the maptools package which can convert many spatial
formats in R:

library(raster)
library(spatstat)
library(maptools)
r.toy <- raster(ncol=40, nrow=20)
r.toy <- rnorm(n=ncell(r.toy))
r.toy.im <- as.im(r.toy)
plot(r.toy.im)

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

answered Nov 11 at 1:06

Ege Rubak

1,8641511

Thank you, I didn't realize that maptools had to be loaded! However, I just tried to do the same thing, this time converting a polygon into an im object and received the same error message, despite maptools being loaded. Is polygon not a suitable data type to be converted to im?
– Carrie Perkins
Nov 11 at 2:25

Correct. Polygon should be converted to owin.
– Ege Rubak
Nov 11 at 8:37

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
1
down vote

accepted

You just need to load the maptools package which can convert many spatial
formats in R:

library(raster)
library(spatstat)
library(maptools)
r.toy <- raster(ncol=40, nrow=20)
r.toy <- rnorm(n=ncell(r.toy))
r.toy.im <- as.im(r.toy)
plot(r.toy.im)

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

answered Nov 11 at 1:06

Ege Rubak

1,8641511

Thank you, I didn't realize that maptools had to be loaded! However, I just tried to do the same thing, this time converting a polygon into an im object and received the same error message, despite maptools being loaded. Is polygon not a suitable data type to be converted to im?
– Carrie Perkins
Nov 11 at 2:25

Correct. Polygon should be converted to owin.
– Ege Rubak
Nov 11 at 8:37

add a comment |

up vote
1
down vote

accepted

You just need to load the maptools package which can convert many spatial
formats in R:

library(raster)
library(spatstat)
library(maptools)
r.toy <- raster(ncol=40, nrow=20)
r.toy <- rnorm(n=ncell(r.toy))
r.toy.im <- as.im(r.toy)
plot(r.toy.im)

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

answered Nov 11 at 1:06

Ege Rubak

1,8641511

Thank you, I didn't realize that maptools had to be loaded! However, I just tried to do the same thing, this time converting a polygon into an im object and received the same error message, despite maptools being loaded. Is polygon not a suitable data type to be converted to im?
– Carrie Perkins
Nov 11 at 2:25

Correct. Polygon should be converted to owin.
– Ege Rubak
Nov 11 at 8:37

add a comment |

up vote
1
down vote

accepted

You just need to load the maptools package which can convert many spatial
formats in R:

library(raster)
library(spatstat)
library(maptools)
r.toy <- raster(ncol=40, nrow=20)
r.toy <- rnorm(n=ncell(r.toy))
r.toy.im <- as.im(r.toy)
plot(r.toy.im)

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

answered Nov 11 at 1:06

Ege Rubak

1,8641511

You just need to load the maptools package which can convert many spatial
formats in R:

library(raster)
library(spatstat)
library(maptools)
r.toy <- raster(ncol=40, nrow=20)
r.toy <- rnorm(n=ncell(r.toy))
r.toy.im <- as.im(r.toy)
plot(r.toy.im)

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

answered Nov 11 at 1:06

Ege Rubak

1,8641511

answered Nov 11 at 1:06

Ege Rubak

1,8641511

answered Nov 11 at 1:06

Ege Rubak

1,8641511

answered Nov 11 at 1:06

Ege Rubak

1,8641511

Thank you, I didn't realize that maptools had to be loaded! However, I just tried to do the same thing, this time converting a polygon into an im object and received the same error message, despite maptools being loaded. Is polygon not a suitable data type to be converted to im?
– Carrie Perkins
Nov 11 at 2:25

Correct. Polygon should be converted to owin.
– Ege Rubak
Nov 11 at 8:37

add a comment |

Thank you, I didn't realize that maptools had to be loaded! However, I just tried to do the same thing, this time converting a polygon into an im object and received the same error message, despite maptools being loaded. Is polygon not a suitable data type to be converted to im?
– Carrie Perkins
Nov 11 at 2:25

Correct. Polygon should be converted to owin.
– Ege Rubak
Nov 11 at 8:37

Thank you, I didn't realize that maptools had to be loaded! However, I just tried to do the same thing, this time converting a polygon into an im object and received the same error message, despite maptools being loaded. Is polygon not a suitable data type to be converted to im?
– Carrie Perkins
Nov 11 at 2:25

Correct. Polygon should be converted to owin.
– Ege Rubak
Nov 11 at 8:37

add a comment |

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