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mapper.eq.lon


mapper
Since v2.2.0
Available on all platforms
See also

This mapper function returns the first longitude in a sliding window which is equal to a given value.

The associated latitude, elevation and value are those of the selected longitude.

The mapper.eq.lon function must be parameterized with the value against which to test for equality.

Signature

Examples

// Because latitudes and longitudes are approximated, this test is a bit tricky. NEWGTS 10 1 2 3 2.0 ADDVALUE 20 4 5 6 5.0 ADDVALUE 30 7 8 9 1.0 ADDVALUE [ SWAP 4.999999953433871 mapper.eq.lon 0 0 0 ] MAP