FC_ISUBSET

Appendix A

FC_ISUBSET(index_list, lengths, nx, FullData) Returns a subset of a feature collection

Concatenates the values of two variables into one list on an abstract E axis.

Note:
This is a grid-changing function. It is generally advisable to include explicit limits when working with functions that replace axes.

Example:

Define a list which represents several features:Feature 1 starts with index 1, Feature 2 starts with index 2, Feature 3 starts with index 9.

yes? let alldata = {1,2,3, 31,32,33,34,35, 101,102,103,104,105,106}

 ! Pick out the second and third features.
yes? let indexlist = {4,9}
yes? let lengths = {5, 6}
yes? let nx = `lengths[x=@sum]`
yes? let fci = fc_isubset(indexlist, lengths, nx, alldata)
yes? list fci
 VARIABLE : FC_ISUBSET(INDEXLIST, LENGTHS, NX, ALLDATA)
 SUBSET : 11 points (X (X))
 1 / 1: 31.0
 2 / 2: 32.0
 3 / 3: 33.0
 4 / 4: 34.0
 5 / 5: 35.0
 6 / 6: 101.0
 7 / 7: 102.0
 8 / 8: 103.0
 9 / 9: 104.0
 10 / 10: 105.0
 11 / 11: 106.0

Note that a similar thing could be accomplished by calling EXPNDI_BY_Z_COUNTS or EXPNDI_BY_M_COUNTS and then applying a mask in the Z or E direction.