# nodirection¶

nodirection

Expression of directional data type

Result = nodirection(expression)

expression
spatial, non spatial directional
Result
dimension of expression boolean

## Operation¶

The expression cell values represent directions, with values equal to 0 or between 0 and 360 (or 2 pi if the global option --radians is set). A cell with no direction (a flat area) has a value -1. Result is a Boolean expression where 1 is TRUE for cells with no direction and 0 is FALSE for cells with a direction.

Each cell without a direction on expression is assigned a 1 (Boolean TRUE) on Result. Cells that have a direction on expression are assigned a 0 (Boolean FALSE) on Result.

## Group¶

This operation belongs to the group of Missing value creation

## Examples¶

1. • pcrcalc
binding
Result = Result.map;
Expr = Expr.map;
initial
report Result = nodirection(Expr);

• python