Run a spatial command

tda_sd reaches any of TDA's spatial commands; the named functions are the ones with an obvious meaning. The spatial data is opened with sdnvar first, which is what the commands operate on.

Usage

tda_sd(s, cmd, options = list(), rhs = NULL, setup = character(), ...)

Arguments

s

a tda_spatial.

cmd

the command name, e.g. "sdinf", "sdvd".

options

a named list of options for the command.

rhs

the command's right-hand side, when it takes one.

setup

extra commands to run before it, such as a PostScript setup.

...

passed to tda_run.

Value

An object carrying the run and, where the command writes one, a table.

See also

Other spatial analysis: plot.tda_spatial(), tda_map(), tda_polygons(), tda_read_dbf(), tda_read_shapefile(), tda_read_spatial, tda_sd_analyses, tda_sd_ps3(), tda_spatial()

Examples

d <- data.frame(id = 1:4, x = c(0, 1, 1, 0), y = c(0, 0, 1, 1))
s <- tda_spatial(d)
r <- tda_sd(s, "sdinf")
cat(r$run$output, sep = "\n")
#> TDA. Analysis of Transition Data (6.4q). Sun Sep 20 10:44:18 2026
#> Current memory: 390032 bytes.
#> 
#> Reading command file: commands
#> ============================================================================
#> sdnvar(...)
#> Reading a spatial data file. Current memory: 390032 bytes.
#> 
#> Idx Variable  T   S  PFmt  Definition
#> -------------------------------------
#>   1 SDID      3   4   0.0  c1
#>   2 SDTyp     3   4   0.0  c2
#>   3 SDN       3   4   0.0  c3
#>   4 SDPtr     3   5  11.0  rd
#> 
#> Creating a new data matrix.
#> Maximum number of cases: 1000
#> 
#> Using data file(s): spatial.sd
#> Free format. Separation character(s): default.
#> Reading data file: spatial.sd
#> Read records: 4 
#> 
#> Created a new data matrix.
#> Number of cases: 4
#> Number of variables: 4
#> Missing values in data file(s): none.
#> 
#> Number of points: 4
#> Number of lines: 0
#> Number of polygons: 0
#> Number of unknown objects: 0
#> 
#> Maximal number of points in spatial objects: 1
#> Total number of points in spatial objects: 4
#> Note: spatial.sd remains opened for further access.
#> 
#> X values. Minimum:         0.0000  Maximum:         1.0000
#> Y values. Minimum:         0.0000  Maximum:         1.0000
#> 
#> End of creating new variables. Current memory: 406449 bytes.
#> ----------------------------------------------------------------------------
#> Information about spatial data. Current memory: 406449 bytes.
#> 
#> Number of points: 4
#> XMin:     0.000000000000   YMin:     0.000000000000
#> XMax:     1.000000000000   YMax:     1.000000000000
#> 
#> Number of lines: 0
#> 
#> Number of polygons: 0
#> ----------------------------------------------------------------------------
#> Current memory: 390032 bytes. Max memory used: 426151 bytes.
#> End of program. Sun Sep 20 10:44:18 2026