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| <table width="100%" summary="page for structField {SparkR}"><tr><td>structField {SparkR}</td><td style="text-align: right;">R Documentation</td></tr></table> |
| |
| <h2>structField</h2> |
| |
| <h3>Description</h3> |
| |
| <p>Create a structField object that contains the metadata for a single field in a schema. |
| </p> |
| |
| |
| <h3>Usage</h3> |
| |
| <pre> |
| structField(x, ...) |
| |
| ## S3 method for class 'jobj' |
| structField(x, ...) |
| |
| ## S3 method for class 'character' |
| structField(x, type, nullable = TRUE, ...) |
| </pre> |
| |
| |
| <h3>Arguments</h3> |
| |
| <table summary="R argblock"> |
| <tr valign="top"><td><code>x</code></td> |
| <td> |
| <p>the name of the field.</p> |
| </td></tr> |
| <tr valign="top"><td><code>...</code></td> |
| <td> |
| <p>additional argument(s) passed to the method.</p> |
| </td></tr> |
| <tr valign="top"><td><code>type</code></td> |
| <td> |
| <p>The data type of the field</p> |
| </td></tr> |
| <tr valign="top"><td><code>nullable</code></td> |
| <td> |
| <p>A logical vector indicating whether or not the field is nullable</p> |
| </td></tr> |
| </table> |
| |
| |
| <h3>Value</h3> |
| |
| <p>A structField object. |
| </p> |
| |
| |
| <h3>Note</h3> |
| |
| <p>structField since 1.4.0 |
| </p> |
| |
| |
| <h3>Examples</h3> |
| |
| <pre><code class="r">## Not run: |
| ##D field1 <- structField("a", "integer") |
| ##D field2 <- structField("c", "string") |
| ##D field3 <- structField("avg", "double") |
| ##D schema <- structType(field1, field2, field3) |
| ##D df1 <- gapply(df, list("a", "c"), |
| ##D function(key, x) { y <- data.frame(key, mean(x$b), stringsAsFactors = FALSE) }, |
| ##D schema) |
| ## End(Not run) |
| </code></pre> |
| |
| |
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