pdl | Scientific computing with Perl | Performance Testing library
kandi X-RAY | pdl Summary
kandi X-RAY | pdl Summary
PDL ("Perl Data Language") gives standard Perl the ability to compactly store and speedily manipulate the large N-dimensional data arrays which are the bread and butter of scientific computing. PDL turns Perl into a free, array-oriented, numerical language similar to (but, we believe, better than) such commercial packages as IDL and MatLab. One can write simple perl expressions to manipulate entire numerical arrays all at once. Simple interactive shells, pdl2 and perldl, are provided for use from the command line along with the PDL module for use in Perl scripts.
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Community Discussions
Trending Discussions on pdl
QUESTION
I am new to pine script coding. I am just trying to plot the previous day's high and the previous day's low in the current day's level. It seems to draw/plot correctly for the rest of the day candles, but the levels/lines are missed on the first candle of the current day. How can that be corrected?
The levels seem to be drawn correctly after the first candle. Same is the case with stepline as well.
Below is my pinescript code
...ANSWER
Answered 2021-May-29 at 15:37study("BNiftyLevels", "BNL", overlay=true)
[h,l] = security(syminfo.ticker, "D", [high,low])
plot(h, style=plot.style_stepline, color=color.red, linewidth=2)
plot(l, style=plot.style_stepline, color=color.green, linewidth=2)
QUESTION
I've been working on this problem for a couple days now and I am just stumped. Trying to integrate Select2.js without using the django-select2 app. My model:
...ANSWER
Answered 2021-May-14 at 22:02Figured out a way to get around the problem: In my forms I created a custom multiple choice field:
QUESTION
I have data. Here's an example:
...ANSWER
Answered 2021-Apr-01 at 14:46You have to share a reproducible data to help you, but maybe this could help you:
QUESTION
I am parsing a binary file (nifti) with a mix of chars, floats, ints, and shorts (using the PDL::IO::Nifti cpan module as reference).
I am having some luck parsing sequences of octets to a string so they can be passed to cl-pack:unpack
. This is convoluted but convenient for porting using the perl module as reference.
This strategy fails on reading #(243 0)
as binary
ANSWER
Answered 2021-Mar-22 at 09:22It seems that the problem is indeed encoding-related:
QUESTION
I'm trying to incorporate Select2 into my django form -- specifically ModelSelect2MultipleWidget -- so that the user can associate multiple event objects to another model (like CheckboxSelectMultiple). The associated models are:
...ANSWER
Answered 2021-Jan-28 at 22:09You can empty the pm_f4_events
field's choices in the __init__
method:
QUESTION
I am trying to plot Previous Day High and Low crossovers. It does fine when the price crosses during the day. However if the opening bar of the day is Higher than previous day it misses it out. Where am I going wrong?
Also on Daily TF ,how can we keep getting latest Daily OHLC various as day progress, as I see the Daily is getting calculated only on closed candles..ie next day.
my code
...ANSWER
Answered 2021-Jan-13 at 09:50study("Cross of previousday High Low", overlay = true)
//define previous day high & Low
h = security(syminfo.tickerid,'D',high[1], lookahead= true)
l = security(syminfo.tickerid,'D',low[1],lookahead= true)
//plot previous day Hi/lo
plot(h,color=color.blue)
plot(l,color= color.blue)
//create condition
pdhc = crossover(close,h)
pdlc = crossunder(close,l)
//plot condition
plotshape(pdhc,style=shape.triangleup, location = location.belowbar, color = color.green)
plotshape(pdlc,style=shape.triangledown, location = location.abovebar, color= color.red)
QUESTION
I have elasticsearch as a single node cluster.
One of the indexes is yellow with the explanation below.
I have read all the material here and in general, I did not find a solution for this problem.
here is the index info:
yellow open research-pdl 8_TrwZieRM6oBes8sGBUWg 1 1 416656058 0 77.9gb 77.9gb
this command POST _cluster/reroute?retry_failed
does not seems to be doing anything.
the setup is running on docker, I have 650GB free space.
...ANSWER
Answered 2020-Dec-16 at 06:36The exception message is very clear, Elasticsearch never assigns the replica of the same primary shard on the same node for high availability reasons.
a copy of this shard is already allocated to this node [[research-pdl][0], node[5zzXP2kCQ9eDI0U6WY4j9Q], [P], s[STARTED], a[id=J7IX30jBSP2jXl5-IGp0BQ]]
And as you have a single node cluster, so you will not have another other node where your replicas can be assigned.
Solutions
- Add more nodes to your cluster, so that replicas can be assigned on other nodes. (preferred way)
- Reduce the replica shards to 0, this can cause data-loss and performance issues. (if at all, you don't have the option to add data-nodes and you want the green state for your cluster).
You can update the replica counts using cluster update API.
QUESTION
ANSWER
Answered 2020-Sep-29 at 12:42Unless I'm missing something....
You are passing a comma separated list of values to the stored proc, as suggested by you default parameter value
QUESTION
Python App
My Python 3.6.8 app runs on CentOS 7.6, and:
- Provides a GUI using Kivy 11.1.1.
- Opens a sub-process from someone else.
- The sub-process provides a custom shell.
- When opened with pipes as below, the sub-process still reads from the terminal.
- It ignores my app's commands to stdin.
- But my app does receive output from the sub-process via the pipe.
Sub-Process
- The sub-process controls a device.
- It normally provides an interactive shell.
- I need to control it from my app.
- To launch it, I invoke a compiled binary.
- It uses some Perl modules.
- Its workings are unknown to me.
Popen Command
I launch the sub-process from the main thread with this command:
...ANSWER
Answered 2020-Jun-08 at 18:52Sub-process reading from tty, not stdin
The sub-process opens 2 file descriptors to /dev/tty:
QUESTION
When I try to carry out a transaction on firestore, it throws me an error Unexpected token admin
on the below code
ANSWER
Answered 2020-Apr-13 at 02:43You are trying to use await
inside a function that is not declared async
. The function is the anonymous function/lambda that you're passing to forEach
. The async
on the outer function doesn't matter at all here. async/await doesn't work with nested lambda functions.
Consider some ideas on how to work with async/await in forEach loops: Using async/await with a forEach loop
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