**APERADD**-
- A bug in APERADD has been fixed which caused the value of the DIAM parameter to be used as the radius of the aperture instead of the diameter.

**COLLAPSE**-
- When using the median estimator, output variances can now be produced for any size of input image. Previously COLLAPSE crashed if the median estimator was used to process large input images containing variance information. This was due to the excesive memory requirements needed to store the order statistics variance-covariance array. Now, if each output value combines more than 300 input values, the output variance is estimated as times the variance on the weighted mean of the input values. If each output value combines fewer than 300 input values, the output variance is calculated as before using the order statistics variance-covariance array.

**ELPROF**-
- Modified ELPROF so that WCS information is propagated from the input image to the output profile and mask.

**LINPLOT**-
- New Parameters XMAP and YMAP have been added to control the mapping of each axis on to the screen. These can, for instance, produce logarithmic axes.
- The YLOG parameter has been removed. Using a value of
`"ValueLog"`for Parameter YMAP will produce the same effect as setting YLOG to`TRUE`.

Starlink User Note 95

Malcolm J. Currie & David S. Berry

2014 May 5

E-mail:starlink@jiscmail.ac.uk

Copyright © 2014 Science and Technology Facilities Council