Calculate the range of an array according to a mask, ignoring
NaNvalues.
The range is defined as the difference between the maximum and minimum values.
var nanmskrange = require( '@stdlib/stats/array/nanmskrange' );Computes the range of an array according to a mask, ignoring NaN values.
var x = [ 1.0, -2.0, 4.0, 2.0, NaN, NaN ];
var mask = [ 0, 0, 1, 0, 0, 0 ];
var v = nanmskrange( x, mask );
// returns 4.0The function has the following parameters:
- x: input array.
- mask: mask array. If a
maskarray element is0, the corresponding element inxis considered valid and included in computation. If amaskarray element is1, the corresponding element inxis considered invalid/missing and excluded from computation.
- If provided an empty array, the function returns
NaN. - The function supports array-like objects having getter and setter accessors for array element access (e.g.,
@stdlib/array/base/accessor).
var uniform = require( '@stdlib/random/base/uniform' );
var bernoulli = require( '@stdlib/random/base/bernoulli' );
var filledarrayBy = require( '@stdlib/array/filled-by' );
var nanmskrange = require( '@stdlib/stats/array/nanmskrange' );
function rand() {
if ( bernoulli( 0.8 ) < 1 ) {
return NaN;
}
return uniform( -50.0, 50.0 );
}
var x = filledarrayBy( 10, 'float64', rand );
console.log( x );
var mask = filledarrayBy( x.length, 'uint8', bernoulli.factory( 0.2 ) );
console.log( mask );
var v = nanmskrange( x, mask );
console.log( v );