Mixing
![find the point of convergence of sequence {$a_n$} [duplicate]](https://lh3.googleusercontent.com/-s5VPjbei54w/AAAAAAAAAAI/AAAAAAAAAWA/6LEwafLl2xw/s72-c/photo.jpg?sz=32)
unix_timestamp of pyspark.sql.functions get null only for the majority of values
0
I try to convert a columns from string to timestamp with this code
from pyspark.sql import SparkSession
from pyspark.sql.functions import sum, avg, count, first, col
from pyspark.sql.functions import unix_timestamp, col, datediff
import csv
if __name__ == "__main__":
spark = SparkSession
.builder
.config("spark.some.config.option", "some-value")
.getOrCreate()
df=spark.read.csv("inSETP11.csv")
df = df.selectExpr('_c0 as USER_ID', '_c1 as timestamp', '_c2 as location')
df.show()
df = df.withColumn('timestamp', unix_timestamp('timestamp', 'yyyy-mm-dd hh:mm:ss'))
df.show()
but i get null (the function return a value only for some)
+-------+---------+--------+
|USER_ID|timestamp|location|
+-------+---------+--------+
| 1| null| 321|
| 1|1359262.2| 386|
| 1|1359271.2| 386|
| 1|1359273.6| 386|
| 1|1359273.6| 386|
| 1|1359274.8| 386|
| 1|1359281.4| 386|
| 1|1359282.0| 386|
| 1| null| 386|
| 1| null| 386|
| 1| null| 386|
| 1| null| 386|
+-------+---------+--------+
how to fix this ?, where is the problem ?
keyword : python apache-spark pyspark unix-timestamp
apache-spark pyspark unix-timestamp pyspark-sql
asked Nov 21 '18 at 8:57
SpecialOneDzSpecialOneDz
11
add a comment |
0
I try to convert a columns from string to timestamp with this code
from pyspark.sql import SparkSession
from pyspark.sql.functions import sum, avg, count, first, col
from pyspark.sql.functions import unix_timestamp, col, datediff
import csv
if __name__ == "__main__":
spark = SparkSession
.builder
.config("spark.some.config.option", "some-value")
.getOrCreate()
df=spark.read.csv("inSETP11.csv")
df = df.selectExpr('_c0 as USER_ID', '_c1 as timestamp', '_c2 as location')
df.show()
df = df.withColumn('timestamp', unix_timestamp('timestamp', 'yyyy-mm-dd hh:mm:ss'))
df.show()
but i get null (the function return a value only for some)
+-------+---------+--------+
|USER_ID|timestamp|location|
+-------+---------+--------+
| 1| null| 321|
| 1|1359262.2| 386|
| 1|1359271.2| 386|
| 1|1359273.6| 386|
| 1|1359273.6| 386|
| 1|1359274.8| 386|
| 1|1359281.4| 386|
| 1|1359282.0| 386|
| 1| null| 386|
| 1| null| 386|
| 1| null| 386|
| 1| null| 386|
+-------+---------+--------+
how to fix this ?, where is the problem ?
keyword : python apache-spark pyspark unix-timestamp
apache-spark pyspark unix-timestamp pyspark-sql
asked Nov 21 '18 at 8:57
SpecialOneDzSpecialOneDz
11
3
Can you show the raw datainSETP11.csv?nullis when the format does not match.
– Jacek Laskowski
Nov 21 '18 at 10:37
I feel you are selecting wrong columns. Try,df = df.withColumn('timestamp', col('timestamp).cast(DoubleType())
– karma4917
Nov 21 '18 at 16:30
add a comment |
0
0
0
I try to convert a columns from string to timestamp with this code
from pyspark.sql import SparkSession
from pyspark.sql.functions import sum, avg, count, first, col
from pyspark.sql.functions import unix_timestamp, col, datediff
import csv
if __name__ == "__main__":
spark = SparkSession
.builder
.config("spark.some.config.option", "some-value")
.getOrCreate()
df=spark.read.csv("inSETP11.csv")
df = df.selectExpr('_c0 as USER_ID', '_c1 as timestamp', '_c2 as location')
df.show()
df = df.withColumn('timestamp', unix_timestamp('timestamp', 'yyyy-mm-dd hh:mm:ss'))
df.show()
but i get null (the function return a value only for some)
+-------+---------+--------+
|USER_ID|timestamp|location|
+-------+---------+--------+
| 1| null| 321|
| 1|1359262.2| 386|
| 1|1359271.2| 386|
| 1|1359273.6| 386|
| 1|1359273.6| 386|
| 1|1359274.8| 386|
| 1|1359281.4| 386|
| 1|1359282.0| 386|
| 1| null| 386|
| 1| null| 386|
| 1| null| 386|
| 1| null| 386|
+-------+---------+--------+
how to fix this ?, where is the problem ?
keyword : python apache-spark pyspark unix-timestamp
apache-spark pyspark unix-timestamp pyspark-sql
asked Nov 21 '18 at 8:57
SpecialOneDzSpecialOneDz
11
I try to convert a columns from string to timestamp with this code
from pyspark.sql import SparkSession
from pyspark.sql.functions import sum, avg, count, first, col
from pyspark.sql.functions import unix_timestamp, col, datediff
import csv
if __name__ == "__main__":
spark = SparkSession
.builder
.config("spark.some.config.option", "some-value")
.getOrCreate()
df=spark.read.csv("inSETP11.csv")
df = df.selectExpr('_c0 as USER_ID', '_c1 as timestamp', '_c2 as location')
df.show()
df = df.withColumn('timestamp', unix_timestamp('timestamp', 'yyyy-mm-dd hh:mm:ss'))
df.show()
but i get null (the function return a value only for some)
+-------+---------+--------+
|USER_ID|timestamp|location|
+-------+---------+--------+
| 1| null| 321|
| 1|1359262.2| 386|
| 1|1359271.2| 386|
| 1|1359273.6| 386|
| 1|1359273.6| 386|
| 1|1359274.8| 386|
| 1|1359281.4| 386|
| 1|1359282.0| 386|
| 1| null| 386|
| 1| null| 386|
| 1| null| 386|
| 1| null| 386|
+-------+---------+--------+
how to fix this ?, where is the problem ?
keyword : python apache-spark pyspark unix-timestamp
apache-spark pyspark unix-timestamp pyspark-sql
apache-spark pyspark unix-timestamp pyspark-sql
asked Nov 21 '18 at 8:57
SpecialOneDzSpecialOneDz
11
asked Nov 21 '18 at 8:57
SpecialOneDzSpecialOneDz
11
asked Nov 21 '18 at 8:57
SpecialOneDzSpecialOneDz
11
asked Nov 21 '18 at 8:57
SpecialOneDzSpecialOneDz
11
asked Nov 21 '18 at 8:57
SpecialOneDzSpecialOneDz
11
11
3
Can you show the raw datainSETP11.csv?nullis when the format does not match.
– Jacek Laskowski
Nov 21 '18 at 10:37
I feel you are selecting wrong columns. Try,df = df.withColumn('timestamp', col('timestamp).cast(DoubleType())
– karma4917
Nov 21 '18 at 16:30
add a comment |
3
Can you show the raw datainSETP11.csv?nullis when the format does not match.
– Jacek Laskowski
Nov 21 '18 at 10:37
I feel you are selecting wrong columns. Try,df = df.withColumn('timestamp', col('timestamp).cast(DoubleType())
– karma4917
Nov 21 '18 at 16:30
3
3
Can you show the raw data
inSETP11.csv? null is when the format does not match.– Jacek Laskowski
Nov 21 '18 at 10:37
Can you show the raw data
inSETP11.csv? null is when the format does not match.– Jacek Laskowski
Nov 21 '18 at 10:37
I feel you are selecting wrong columns. Try,
df = df.withColumn('timestamp', col('timestamp).cast(DoubleType())– karma4917
Nov 21 '18 at 16:30
I feel you are selecting wrong columns. Try,
df = df.withColumn('timestamp', col('timestamp).cast(DoubleType())– karma4917
Nov 21 '18 at 16:30
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
});
}
});
draft saved
draft discarded
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%2f53408384%2funix-timestamp-of-pyspark-sql-functions-get-null-only-for-the-majority-of-values%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
draft saved
draft discarded
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.
draft saved
draft discarded
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%2f53408384%2funix-timestamp-of-pyspark-sql-functions-get-null-only-for-the-majority-of-values%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
3
Can you show the raw data
inSETP11.csv?nullis when the format does not match.– Jacek Laskowski
Nov 21 '18 at 10:37
I feel you are selecting wrong columns. Try,
df = df.withColumn('timestamp', col('timestamp).cast(DoubleType())– karma4917
Nov 21 '18 at 16:30