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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# ALTA -- Linearly map a vector into another vector of the same datatype.
+# b[i] = (a[i] + k1) * k2
+
+procedure altas (a, b, npix, k1, k2)
+
+short a[ARB], b[ARB]
+real k1, k2
+int npix, i
+
+begin
+ do i = 1, npix
+ b[i] = (a[i] + k1) * k2
+end