Appendix A Sec31.
XCAT (A, B )
Concatenates the values of two variables into one list on an abstract X axis.
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Arguments: |
A |
variables to concatenate in X |
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B |
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Result Axes: |
X |
Abstract, with length the sum of the length of the X axes of A and B |
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Y |
Inherited from variables A and B |
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Z |
Inherited from variables A and B |
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T |
Inherited from variables A and B |
Note:
This is a grid-changing function. It is generally advisable to include explicit limits when working with functions that replace axes. for example, consider the function xcat(a,b). Look at the expressions
list/i=10:20 xcat(a,b)
and
list xcat(a[i=16:20],b[i=1:5])
Both will list 10 values in the X direction. The former will list the 10th through 20th data values indices from the entire I range of both variables. The latter will list all of the data that results from concatenating b[i=1:5] onto a[i=16:20].
XCAT_STR (sA, sB) concatenates string variables in the X direction. If XCAT is called with string arguments, Ferret runs XCAT_STR. The two arguments to XCAT must be of the same type.
yes? let a = xsequence({"Q", "R", "S"})
yes? let b = xsequence({"U", "V", "W"})
yes? list xcat(a,b)