# reitaplott: Function that fills rectangles or sub-rectangles according to... In geo: Draw and Annotate Maps, Especially Charts of the North Atlantic

## Description

Function that fills rectangles or sub-rectangles according to the amount of fish calculated in them, or some other quantity.

## Usage

 ```1 2 3 4 5``` ```reitaplott(reitur, smareitur = NULL, z, levels = NULL, colors = NULL, density = 1, maxcol = 155, nlevels = 6, white = FALSE, border = FALSE, angle = 45, rotate = 0, digits = 0, cex = 0, label.location = 0, labels.only = FALSE, col = 1, outside = TRUE, mincol = NULL) ```

## Arguments

 `reitur` Number of square. If number of square >1000 the last digit means subsquare. For example 5604 means square 560, subsquare 4. `smareitur` Number of subsquare if they are used. Default is that subsquare is not used. `z` Values for each square and subsquare. `levels` Values between colors or different density of lines. Default is to let the program find it. A small example shows how levels are given. levels <- c(0, 100, 1000, 2000, 4000, 5000, 8000) Then the groups are <100, 100-1000, 2000-4000, 4000-5000 & >5000, i.e. the program more or less ignores the first and the last values given. `colors` Number of color or shading pattern for each level. Colours can go from 0 thru 155. They go from white = 0, black = 1, blue = 2, green, yello, red = 155. Density goes from 10 thru 130. Everything above 130 is completely black. If colors is not given the program determines it from the data. Default maximum density is set to 70 but everything above that is very black. `density` If density is 0 coloured plot is made else different desity of lines is used. `maxcol` Maximum color ( or density) Default value is 155 for colors 70 for shading. All density of lines > 130 are black. `nlevels` Number of levels. Default value is 6. `white` If white = TRUE the lowest color or density is zero. Default value is white. `border` If border of polygon is to be drawn. Default value is FALSE. `angle` Angle of lines used for hatching. Default value is 45 degrees. `rotate` Rotation of hatcing lines between each level. Default value is zero or no rotation but rotate = 90 is very useful. `digits` Number of digits in labels. Default value is zero. `cex` Charcter expansion of digits in labels. Default value is the current size when the program is called. `label.location` location of labels, default is no labels are plotted. `labels.only` if true only labels are plotted. `col` the color of lines, default is 1 (black). `outside` if true squares outside plot area are plotted, default is true. `mincol` the color number of the first color to be used, colors are taken from the range mincol to maxcol.

## Details

Geoplot has to be called before to set the parameter geopar. If geoplot is called with the parameter cont = TRUE labels are plotted on the left hand side of the plot. If a color plot is to be made litaps has to be called before.

## Value

No values returned.

## Side Effects

No side effects.

`geoplot`.
 ```1 2 3 4 5 6 7 8``` ```geoplot(reitur = TRUE) reitur <- c(560, 560, 560, 560, 561, 561, 561, 561) smareitur <-c(1, 2, 3, 4, 1, 2, 3, 4) lab.loc <- list(lat = c(63.95, 65.4), lon = c(-19.8, -17.3)) z <- c(100, 200, 300, 222, 345, 453, 232, 212) geopolygon(island); geolines(island) reitaplott(reitur, smareitur, z, rotate = 90, label.location = lab.loc) # All subsuares in square 560 and 561. ```