and I need help (again).
My problem is as follow:
1.- I need to print the values of a volume using ParaView.
2.- I save the values with coordinates and intensities and a file .Csv.
i,j,k,Intensity
0,0,0,0.000000
0,1,0,0.000000
0,2,0,0.000000
0,3,0,0.000000
0,4,0,0.000000
0,5,0,0.000000
etc...
3.- But What I get is:
4.- I know Paraview use a lot of format, but I need to print the values of volume with data obtained from language C(not c++).
5.- Finally the true question... Can I use this kind of file (csv) to print a volume or I need to change to other? Because I don't have idea how to make RAW o TVK... can you help me please?
Ivan.
Ivan, I am not to sure if I understand you but you can use the
"Table To Structured Grid" filter, then you can represent it as a Volume and color by the intensity scalar field.
Related
I simply have a dataframe of "lat" and "lon" coordinates that I would like to visualize on a map.
I am trying to view my data data on the map. But nothing is being displayed.
In my case, the mmsi is the id.
Please note that I have around 2M points to display. Is that possible in databricks?
If there is no way around (plotting 2,000,000 points) in databricks, then what tool can handle large amount of data?
Any help is much appreciated!!
The built in map does not support latitude / longitude data points.
Delivering 2 million data points directly to a browser is problematic. Databricks has a protective limit of 20 MB for HTML display. Your viewers won't be able to take in and visually process that level of detail at any point in time.
I recommend implementing a filter/summarization strategy to enable the display within Databricks notebooks. Some ideas can be taken from this Databricks post: https://databricks.com/blog/2019/12/05/processing-geospatial-data-at-scale-with-databricks.html
Also this Anaconda post gives an excellent survey of data visualization packages, some (like Datashader, Vaex) implement a visual summarization strategies before rendering images: https://www.anaconda.com/blog/python-data-visualization-2018-why-so-many-libraries
The error message clearly says that " Unrecognizable values in the first column. The values should be either country codes in ISO 3166-1 alpha-3 format (e.g. "GBR") or US state abbreviations (e.g. "TX")."
Note: To plot a graph of the world, use country codes in ISO 3166-1 alpha-3 format as the key.
A Map Graph is a way to visualize your data on a map.
Plot Options... was used to configure the graph below.
Keys should contain the field with the location.
Series groupings is always ignored for World Map graphs.
Values should contain exactly one field with a numerical value.
Since there can multiple rows with the same location key, choose "Sum", "Avg", "Min", "Max", "COUNT" as the way to combine the values for a single key.
Different values are denoted by color on the map, and ranges are always spaced evenly.
Reference: Databricks - Charts and Graph
Hope this helps.
I have just been given an assignment for University on databases where I have to use Oracle APEX. For one of my columns in a report, I need to use a format mask. The format mask I need in the form of AAAA00, where A is any letter and 0 is any number.
Trying to get this to work is an issue though. I've heard the syntax for any number is 9 and I assume it's A for the letter, so wouldn't the format mask be AAAA99?
This is what I tried
I tried using it but didn't succeed. When using the form, you can still input anything. I even tried using one of the default date options for the format mask, and that didn't work either.
Any ideas on what to do?
Oracle APEX Format Mask is only for the Number and Date type objects, you can't format strings using it.
Also, Format Masks are for display only, lets say I have a mask 9G9G9G9 in an Interactive Grid column, it would display numbers like : 3,1,4,1. I could go and edit my cell putting 1337, it won't change until I save my report, it will then format itself in my mask and display my number as 1,3,3,7.
I believe you are trying to restrict your user from giving an input other than in your format, (an input mask), I believe this post could help you achieve what you are trying .
My table name is map and I have latitude(double),longitude(double) and locationGeo(geometry) columns. I want to use a function to automatically compute the LocationGeo value using the given latitude and longitude values when I save a record. That's my wanted format:
Point(latitude,longitude),SRID
I can't find documentation for it in web.
Using the default value is not the adequate way. What if you insert a record with no latitude or longitude? Instead you should either construct the geometry when you insert it, or make use of a trigger to make validation and compute it for you.
How does creating a large object work? Does there need to be a client, because all I am hoping to do is have an image be one column.
I am typing the following commands after creating my table but I just get an error about the path not being correct for the image (even though I have it starting right from the C drive).
CREATE TABLE image (name text,
raster oid);
INSERT INTO image (name, raster)
VALUES ('beautiful image', lo_import('C:Documents/etc/motd'));
I am not running any C code, am I suppose to do that or does this automatically create the object Large Object?
If I am suppose to run some C code where would I do it with respect to PostgreSQL?
Can I do what I want all with PostgreSQL syntax? Is there another way to approach including images as a field?
Any help will be greatly appreciated.
According to PostgreSQL documentation, there's two ways to handle large objects (considering Java JDBC):
To use the bytea data type you should simply use the getBytes(), setBytes(), getBinaryStream(), or setBinaryStream() methods.
and
LargeObject API.
Also, you can covert your image to a base64 string and then insert it directly using, for instance, PgAdmin:
CREATE TABLE image_table (name varchar(255), DATA bytea);
INSERT INTO image_table
VALUES ('my_image.jpg',
decode('paste your byte array string here', 'base64'));
Full sample code here.
I've been assigned the task of creating a table that stores an email signature for each username. The question is, how should I store the signature block? I could use a regular varchar type, but then how do I store the formatting metadata?
Any ideas or suggestions would be welcome.
Thanks!
Another idea I had was that you could design a specific email signature template, and then let people specify fields, such as Username, quote, avatar, alignment etc, and then have them modify their signature in a "signature editor". This way you could just store the "data" and not the rendering. so you could store something like follows:
<signature>
<username>chama</username>
<avatar href="http://url to my image"/>
<quote>A bird in the hand is not in the nest</quote>
</signature>
and it could look something like:
Chama
A bird in the hand is not in the nest
use varchar(max), or whatever length limit is appropriate.
otherwise, the only real concern is that you might want to make sure the html is html-encoded before you stick it in the database. (i.e., replace < with <, etc.) Not sure what you're using, but some tools have a setting so you don't have to do it manually.
other things you can do besides / in addition to html-encoding
1) restrict the formatting tags to some pre-defined set (i.e., search/replace tags you don't want before doing the insert. You can manage this in your db stored procedure, or better yet, in your front-end (if you have control over that).
2) disqualify attempts to insert data if they include certain tags (like '<script>', etc.)
HTML, RTF, XML. The stanard choices are multiple.
Note: "email signature" is NOT "digital signature". The term digital signature has a specific meaning and means a SIGNATURE to make sure - for email - it comes from th real sender and has not been tampered with.
I'd suggest going with your initial thought -- varchar(max). This will allow you to store signatures that are ASCII based. This includes plaintext, RTF or HTML signatures.
If users want to embed images (i.e. not a link to an image), then you'd have to determine a way for the caller to convert those images to Base64 or other before storing and after reading from your table.
Based on what I'm finding, you have basically two options:
1) Convert your formatted signature data to Binary and store it as a BLOB.
2) Instead of saving the signature itself in the DB, save them as files somewhere and store a reference to that file location in the DB.