The dsMergeH is a special spreadsheet function supplied by Deriscope that creates a data array by merging the contents of up to 6 ranges in horizontal fashion.
It takes at least 2 arguments with additional optional arguments up to a maximum total of 6 and has the following form:

=dsMergeH( arg1, arg2, [arg3], …, [arg6] )

Each supplied argument must be some range.
All ranges must have the same height (i.e. number of rows) so that they can be collated from left to right.
The data of the first range arg1 will be the leftmost section of the produced merged array of data.