Associative array/Creation: Difference between revisions
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R lacks a native representation of key-value pairs, but different structures allow named elements, which provide similar functionality. |
R lacks a native representation of key-value pairs, but different structures allow named elements, which provide similar functionality. |
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=== environment example === |
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<lang r>> env <- new.env() |
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> env[["x"]] <- 123 |
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> env[["x"]]</lang> |
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<pre>[1] 123</pre> |
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<lang r>> index <- "1" |
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> env[[index]] <- "rainfed hay" |
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> env[[index]]</lang> |
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<pre>[1] "rainfed hay"</pre> |
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<lang r>> env[["1"]]</lang> |
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<pre>[1] "rainfed hay"</pre> |
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<lang r>> env</lang> |
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<pre><environment: 0xb7cd560></pre> |
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<lang r>> print(env)</lang> |
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<pre><environment: 0xb7cd560></pre> |
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=== vector example === |
=== vector example === |
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