define name and content of dataframe dynamically with list in input
I wrote the following function :
def extractFromInput(inputName: String, colNames: List[String]): DataFrame = {
val inputData: List[String] = inputName.split("-").map(_.trim).toList
inputData.foldLeft(df) {
(df: DataFrame, columnName: String) =>
df.withColumn(columnName, lit(columnName))
}
}
I rather want to traverse colNames List and use it to define the new columns names with the content of this list.
With the actual function the content of the columns is filled properly , but I can't make them be named properly.
Any idea how to do this please
scala apache-spark dataframe
asked Nov 27 '18 at 16:27
scalacodescalacode
12919
add a comment |
I wrote the following function :
def extractFromInput(inputName: String, colNames: List[String]): DataFrame = {
val inputData: List[String] = inputName.split("-").map(_.trim).toList
inputData.foldLeft(df) {
(df: DataFrame, columnName: String) =>
df.withColumn(columnName, lit(columnName))
}
}
I rather want to traverse colNames List and use it to define the new columns names with the content of this list.
With the actual function the content of the columns is filled properly , but I can't make them be named properly.
Any idea how to do this please
scala apache-spark dataframe
asked Nov 27 '18 at 16:27
scalacodescalacode
12919
It is not clear what you're asking. What is the purpose ofcolNamesin your method ? It is never used. Please edit your question with a concrete example
– cheseaux
Nov 27 '18 at 22:17
add a comment |
I wrote the following function :
def extractFromInput(inputName: String, colNames: List[String]): DataFrame = {
val inputData: List[String] = inputName.split("-").map(_.trim).toList
inputData.foldLeft(df) {
(df: DataFrame, columnName: String) =>
df.withColumn(columnName, lit(columnName))
}
}
I rather want to traverse colNames List and use it to define the new columns names with the content of this list.
With the actual function the content of the columns is filled properly , but I can't make them be named properly.
Any idea how to do this please
scala apache-spark dataframe
asked Nov 27 '18 at 16:27
scalacodescalacode
12919
I wrote the following function :
def extractFromInput(inputName: String, colNames: List[String]): DataFrame = {
val inputData: List[String] = inputName.split("-").map(_.trim).toList
inputData.foldLeft(df) {
(df: DataFrame, columnName: String) =>
df.withColumn(columnName, lit(columnName))
}
}
I rather want to traverse colNames List and use it to define the new columns names with the content of this list.
With the actual function the content of the columns is filled properly , but I can't make them be named properly.
Any idea how to do this please
scala apache-spark dataframe
scala apache-spark dataframe
asked Nov 27 '18 at 16:27
scalacodescalacode
12919
asked Nov 27 '18 at 16:27
scalacodescalacode
12919
edited Nov 27 '18 at 17:01
scalacode
asked Nov 27 '18 at 16:27
scalacodescalacode
12919
asked Nov 27 '18 at 16:27
scalacodescalacode
12919
asked Nov 27 '18 at 16:27
scalacodescalacode
12919
12919
It is not clear what you're asking. What is the purpose ofcolNamesin your method ? It is never used. Please edit your question with a concrete example
– cheseaux
Nov 27 '18 at 22:17
add a comment |
It is not clear what you're asking. What is the purpose ofcolNamesin your method ? It is never used. Please edit your question with a concrete example
– cheseaux
Nov 27 '18 at 22:17
It is not clear what you're asking. What is the purpose of
colNames in your method ? It is never used. Please edit your question with a concrete example– cheseaux
Nov 27 '18 at 22:17
It is not clear what you're asking. What is the purpose of
colNames in your method ? It is never used. Please edit your question with a concrete example– cheseaux
Nov 27 '18 at 22:17
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53504051%2fdefine-name-and-content-of-dataframe-dynamically-with-list-in-input%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53504051%2fdefine-name-and-content-of-dataframe-dynamically-with-list-in-input%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
It is not clear what you're asking. What is the purpose of
colNamesin your method ? It is never used. Please edit your question with a concrete example– cheseaux
Nov 27 '18 at 22:17