readelevdata {CTFS} | R Documentation

## Read a Text or RData Dataframe and Make a Matrix, Specifically for Elevation Data

### Description

Read a tab delimited text file or an RData dataframe containing the x, y coordinates and elevation at those coordinates The standard file has measurements at every 5 by 5 m point in the plot. A matrix is returned for use in topographic mapping functions.

### Usage

    readelevdata(elevfile, gridsize = 5, text = FALSE)

### Arguments

`elevfile` | file containing elevation data. `bcielev.info` is the RData dataframe. Or specify a text, tab delimited file.
`gridsize` | the scale at which the measurement in elevation were made. Must be regular.
`text` | indicates where the `elevfile` is a text file or a dataframe.

### Details

This function is used to convert a spreadsheet text file or a dataframe to a matrix so that topographic maps can be made of the plots.

### Value

Returns a matrix with rows and columns in the same pattern of the actual measurement in the plot. In the case of the standard plot, 1000 by 500 m, measured at 5 m intervals, there are 101 rows and 201 columns. All edges of the plot are included.
1000 / 5 = 200 + 1 (outer edge) = 201 columns
500 / 5 = 100 + 1 (outer edge) = 101 rows

### Author(s)

Rick Condit and Suzanne Lao

### See Also

`CTFS.readwrite`

### Examples

    ## Not run:
    readelevdata(bcielev.info)->elev.mat
    dim(elev.mat)
    bcielev.info[1:10,]
    elev.mat[1:10,1:10]

    ## End(Not run)

[Package CTFS version 1.00 Index]