2019-1 | Material y apuntes para los alumnos que cursan materias
kandi X-RAY | 2019-1 Summary
kandi X-RAY | 2019-1 Summary
Material y apuntes para los alumnos que cursan materias en la FI durante el semestre 2019-1
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2019-1 Key Features
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Trending Discussions on 2019-1
QUESTION
I have a grib file containing monthly precipitation and temperature from 1989 to 2018 (extracted from ERA5-Land).
I need to have those data in a dataset format with 6 column : longitude, latitude, ID of the cell/point in the grib file, date, temperature and precipitation.
I first imported the file using cfgrib. Here is what contains the xdata list after importation:
...ANSWER
Answered 2021-Jun-16 at 02:36Here is the answer after a bit of trial and error (only putting the result for tp variable but it's similar for t2m)
QUESTION
I have xml where each worker can have multiple events. The events need not be grouped but if there are two events with same Effective_Date, I'd like to increment the sequence. Below is sample xml:
XML:
...ANSWER
Answered 2021-Jun-14 at 16:57Would something like this work for you:
XSLT 2.0
QUESTION
Using as input a data frame like this one:
...ANSWER
Answered 2021-Jun-13 at 22:19We can reshape into 'long' format with pivot_longer
and do the group by mean
QUESTION
Having a dataframe like this:
...ANSWER
Answered 2021-Jun-13 at 21:53We can use tidyverse
. Below are the steps followed:
- Group by 'id', 'timespand'
- Get the
sum
of columns thatstarts_with
'c' insummarise
- Convert the 'timespand' to
Date
class - Use
complete
to include the missing combinations by taking theseq
uence of 'timespand' frommin
tomax
by '6 month' - Reconvert the 'timespand' back to the original format and
arrange
the rows
QUESTION
I am very new to SQL and have been given a dataset to clean as part of my internship.
I reproduce part of the table below:
...ANSWER
Answered 2021-Jun-13 at 11:45You can write a query using first_value
:
QUESTION
Inserting a data frame like this:
...ANSWER
Answered 2021-Jun-13 at 09:51Convert the time
to POSIXct
format and use subset
to keep the rows after '2017-01-01'
.
QUESTION
I am trying to create an arm template that creates an additional subnet on an existing Vnet and also creates the NSG at the same time and then attaches it to the subnet. I have got it to the point the NSGs are created but the minute I try to attach NSG to multiple subnets it fails to create the subnet and NSG. Error below
...ANSWER
Answered 2021-Jun-12 at 17:51You have a "mode": "Incremental"
property on a resource 'subnetname1'. subnet does not take a mode parameter - see the reference: https://docs.microsoft.com/en-us/azure/templates/microsoft.network/virtualnetworks/subnets?tabs=json
However, when deploying virtual network, be aware of an well known problem - you need to specify subnets as a property of a vnet. Although you have option do deploy a subnet resource, when you run your template for the second time, virtualNetwork resource will try to remove all subnets (because property subnets is empty) - see more here: https://github.com/Azure/azure-quickstart-templates/issues/2786
QUESTION
In the below table for each account is there a way to pull the latest next immediate date to the date where the Inventory = 5?
Account Date Inventory 123 2019-04-01 5 123 2019-05-01 6 123 2019-07-01 9 123 2019-08-01 5 123 2019-09-01 8 123 2019-10-01 9 54321 2018-01-01 5 54321 2018-02-01 7 54321 2018-03-01 5 54321 2018-04-01 9 54321 2018-05-01 8Expected outcome
Account Date 123 2019-09-01 54321 2018-04-01 ...ANSWER
Answered 2021-Jun-12 at 07:04SELECT TOP 2 account
FROM table
WHERE inventory = 5
ORDER BY date DESC
QUESTION
The app has:
- ListView listing player names from a DB table (only one column, so it is primary key)
- EditText to write the new name
- Button to update the name of player in the list
*there are more things, but i don´t want to make it more messy
I can click a name from the list and write a new name in the EditText. When you press the button that name is updated in the list.
Everything works correctly, but there is a problem. When I write a name that it is already in the list the app fails because primary keys cannot be repeated.
Is there some way to say "if EditText text already exists in the DB... then show a toast"
I already tried "if result of db.update is -1...then show a toast", but it doesn´t work.
This is the method in MainActivity:
...ANSWER
Answered 2021-Jun-11 at 22:09Issues
You have a UNIQUE index on the NUM_JUG column (perhaps implicit if NON_JUG is defined with PRIMARY KEY) and you are using the standard update method which uses the default conflict action of ABORT and therefore fails if an attempt is made to duplicate a NOM_JUG value.
As secondary issue is that the SQLiteDatabase update
method returns the number of updates (see extract and link below) (same for updateWithOnConflict
). The number returned will never be -1 it will be 0 or more (0 indicating that no updates have been applied).
As per SQLite Database - Update
Returns
int the number of rows affected
Fix
To fix the main issue you should use the updateWithOnConflict
method. This takes a 4th parameter a conflict and you probably want IGNORE so you could use :-
QUESTION
After multiple searches I couldn't find a fit solution that would work in my case.
I have the following table:
...ANSWER
Answered 2021-Jun-11 at 16:07You'd need to do this with window functions in MySQL 8.0:
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