limit_fun_na: Get data limiting function to NA.

In neuroconductor/fsbrain: Managing and Visualizing Brain Surface Data

Description

Get data limiting function to use in rglactions as 'trans_fun' to transform data. This is typically used to limit the colorbar in a plot to a certain range. This is similar to clip.data, but uses absolute values instead of percentiles to clip.

Usage

limit_fun_na(vmin, vmax)

Arguments

vmin	numerical scalar, the lower border. Data values below this will be set to vmin in the return value.
vmax	numerical scalar, the upper border. Data values above this will be set to vmax in the return value.

Value

a function that takes as argument the data, and clips it to the requested range. I.e., values outside the range will be set to 'NA'. Designed to be used as rglactions$trans_fun in vis functions, to limit the colorbar and data range.

Note

This is useful for thresholding stuff like t-value maps. All values outside the range will be displayed as the background color.

Examples

   rglactions = list("trans_fun"=limit_fun_na(2,3));

neuroconductor/fsbrain documentation built on Sept. 16, 2020, 2:30 p.m.