Difference between revisions of "Concat"
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When A and B are 1-D arrays, | When A and B are 1-D arrays, | ||
Concat(A,B) | Concat(A,B) | ||
| − | returns a list consisting of their elements. This form is often used to concatentate two indexes to obtain the elements for a third index. | + | returns a list (1-D array) consisting of their elements. This form is often used to concatentate two indexes to obtain the elements for a third index. |
| + | |||
| + | When A and B are 1-D arrays with a common index | ||
| + | |||
| + | Concat([A],[B]) | ||
| + | returns a 2-D array with two columns. If only two parameters are used, column index is .K. | ||
When A and B are arbitrary arrays, where A has index I and B has index J, then | When A and B are arbitrary arrays, where A has index I and B has index J, then | ||
Revision as of 03:50, 15 August 2010
Concat(A,B,I,J,K)
Concatenates lists or arrays.
When A and B are 1-D arrays,
Concat(A,B)
returns a list (1-D array) consisting of their elements. This form is often used to concatentate two indexes to obtain the elements for a third index.
When A and B are 1-D arrays with a common index
Concat([A],[B])
returns a 2-D array with two columns. If only two parameters are used, column index is .K.
When A and B are arbitrary arrays, where A has index I and B has index J, then
Concat(A,B,I,J,K)
concatenates (i.e., joins) arrays A and B, with the new result indexed by K. You must provide an index K whose length is the sum of the lengths of I and J. Often the index K is obtained using the first form of concatenate.
(new to 4.1) You can omit the K parameter:
Concat(A,B,I,J)
when you do so, the function creates a new local index named K for the result.
Library
Array functions
Examples
Index In1 := ['a','b','c']
Concat( In1, ['z'] ) &rarry ['a','b','c','z']
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