uncertain | Fast and correct computations with uncertain values
kandi X-RAY | uncertain Summary
kandi X-RAY | uncertain Summary
Fast and correct computations with uncertain values. When working with values which are not exactly determined, such as sensor data, it can be difficult to handle uncertainties correctly.
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QUESTION
Thank you in advance for any help provided as it's much appreciated! Hope you're all keeping well in these uncertain times.
I have a question regarding Google Sheets. Below you'll find a link to a very large Google Sheets document in which I am trying to substitute text such as 'XXXXX', 'BBBBB', 'TTTTT', 'YYYYY', 'RRRRR' and replacing the same phrases into situations later in the document. If someone could help input a formula into columns such as P, Q, R, S, T, V and W that would be really helpful. I believe I have made the document pretty self-explanatory where in row 1 you can find the labels 'XXXXX', 'BBBBB', 'TTTTT', 'YYYYY', 'RRRRR' and the places to replace them respectively in columns P, Q, R, S, T, V and W.
I have tried to use an arrayformula with substitute, but every time I did this I could only change the first row and it would not cascade down the sheet to affect the other 900+ rows no matter what I tried.
I would appreciate an explanation of how to do it if someone is changing the document so I can learn moving forwards!
The other thing which I am very confused about how to achieve is, if in column O the word 'Yes' appears, then I would like 'VF' to come into column W but if it says 'No' in column O then I don't want it to appear in column W.
Again an explanation of how this is achieved, as well as implementing it into my document would be much appreciated!
Thank you.
https://docs.google.com/spreadsheets/d/1JgAFxqJqVlg2Q-LtLP1udrdJksJAtpC1tLH5dyxf1SA/edit?usp=sharing
...ANSWER
Answered 2021-Jun-14 at 18:55You can use Arrayformula
and combine the text using &
.
For example in the cell P4 you can have the formula:
=ArrayFormula("How can I buy "&F4:F&" at a trade price? In order to enquire about purchasing "&F4:F&" at a trade price, please get in touch with us at sales@drinksshop.co.uk")
So you are basically just adding text to F4:F
using &
. You can do this to all the other columns accordingly.
And using the same logic you can add the following formula in cell W4:
=ArrayFormula(F4:F&", "&J4:J&", "&M4:M&", "&IF(O4:O="Yes", "VF", ""))
QUESTION
I was reading a decent paper S-DCNet and I fell upon a section (page3,table1,classifier) where a convolution layer has been used on the feature map in order to produce a binary classification output as part of an internal process. Since I am a noob and when someone talks to me about classification I automatically make a synapse relating to FCs combined with softmax, I started wondering ... Is this a possible thing to do? Can indeed a convolutional layer be used to classify a binary outcome? The whole concept triggered my imagination so much that I insist on getting answers...
Honestly, how does this actually work? What is the difference between using a convolution filter instead of a fully connected layer for classification purposes?
Edit (Uncertain answer on how does it work): I asked a colleague and he told me that using a filter of the same shape as the length-width shape of the feature map at the current stage, may lead to a learnable binary output (considering that you also reduce the #channels of the feature map to a single channel). But I still don't understand the motivations behind such a technique ..
...ANSWER
Answered 2021-Jun-13 at 08:43Using convolutions as FCs can be done (for example) with filters of spatial size (1,1) and with depth of the same size as the FC input size.
The resulting feature map would be of the same size as the input feature map, but each pixel would be the output of a "FC" layer whose weights are the weights of the shared 1x1 conv filter.
This kind of thing is used mainly for semantic segmentation, meaning classification per pixel. U-net is a good example if memory serves.
Also see this.
Also note that 1x1 convolutions have other uses as well.
paperswithcode probably some of the nets there use this trick.
QUESTION
Now I have a nested list with integers and the amout of layers is uncertain based on user input. How can I go though each element and update its value?
For example, use char() for conversion.
...ANSWER
Answered 2021-Jun-10 at 03:30You're close! Since you're getting each value from get_all_values
you can collect them as they're yielded using a list generator like so:
QUESTION
I'd like to get an Azure Function working where the function gets triggered on every new item, modify of an existing item, or deletion of an item in the CosmosDB. The documentation i've been able to find so far is always about CosmosDB functioning as a documentDB.
However, I am using cosmosdb as a table storage for simple data. I've also found seperate documentation for Azure Table Storage which would trigger Azure Function, but i'm uncertain if that applies to CosmosDB also? To me it doesn't seem usable as it triggers on a queue message. https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-storage-table-input?tabs=python
I currently have a function which puts data into the table using the python SDK. So there is not queue message to trigger off of.
Does anyone know how I create a function like this? A trigger on the control plane operation for the Table? So I can have the function look at the data in the table for that specific request.
...ANSWER
Answered 2021-Jun-08 at 02:08I'd like to get an Azure Function working where the function gets triggered on every new item, modify of an existing item, or deletion of an item in the CosmosDB.
Azure function doesn't offer such a trigger to achieve what you want. You can design your own logic.
Such as:
1, Create a http trigger, call the http trigger after you finish the operations.
2, Create a queue trigger, send messages to queue trigger after you finish the operations.
QUESTION
For an Android app that uses Jeremy Feinstein's SlidingMenu and targets API level 29, a problem has recently been noted on 2 devices (Samsung Galaxy A01 and Samsung Galaxy Note20 Ultra, running Android 11) whereby the content at the bottom of the screen is covered by the navigation bar.
The only thing that has made a difference on the 2 affected devices is adding this in the sliding menu constructors:
...ANSWER
Answered 2021-Jun-04 at 06:25The problem was a navigation bar height calculation, which had to be adjusted for devices with display cutouts, thanks to @JohnLord for picking up on that difference.
QUESTION
I hope someone can help me out with the following:
I am trying to dynamically hide rows based on values on another worksheet. However, I am getting the error "Next without For" but I am also uncertain as to the functionality of my code. I would very much appreciate it if someone could help me out here.
...ANSWER
Answered 2021-May-26 at 10:56You can change this part to simplify the code, since you don't have to select the worksheet:
QUESTION
Tl;dr: I would like a function that randomly returns a float (or optionally an ndarray of floats) in an interval following a probability distribution that resembles the sum of a "Gaussian" and a uniform distributions.
The function (or class) - let's say custom_distr()
- should have as inputs (with default values already given):
- the lower and upper bounds of the interval:
low=0.0
,high=1.0
- the mean and standard deviation parameters of the "Gaussian":
loc=0.5
,scale=0.02
- the size of the output:
size=None
size
can be an integer or a tuple of integers. If so, thenloc
andscale
can either both simultaneously be scalars, or ndarrays whoseshape
corresponds tosize
.
The output is a scalar or an ndarray, depending on size.
The output has to be scaled to certify that the cumulative distribution is equal to 1 (I'm uncertain how to do this).
Note that I'm following numpy.random.Generator
's naming convention from uniform
and normal
distributions as reference, but the nomenclature and the utilized packages does not really matter to me.
Since I couldn't find a way to "add" numpy.random.Generator
's uniform and Gaussian distributions directly, I've tried using scipy.stats.rv_continuous
subclassing, but I'm stuck at how to define the _rvs
method, or the _ppf
method to make it fast.
From what I've understood of rv_continuous class definition in Github, _rvs
uses numpy
's random.RandomState
(which is out of date in comparison to random.Generator
) to make the distributions. This seems to defeat the purpose of using scipy.stats.rv_continuous
subclassing.
Another option would be to define _ppf
, the percent-point function of my custom distribution, since according to rv_generic class definition in Github, the default function _rvs
uses _ppf
. But I'm having trouble defining this function by hand.
Following, there is a MWE, tested using low=0.0
, high=1.0
, loc=0.3
and scale=0.02
. The names are different than the "The issue" section, because terminologies of terms are different between numpy
and scipy
.
ANSWER
Answered 2021-May-25 at 23:30According to Wikipedia, the ppf, or percent-point function (also called the Quantile function), can be written as the inverse function of the cumulative distribution function (cdf), when the cdf increases monotonically.
From the figure shown in the question, the cdf of my custom distribution function does, indeed, increase monotonically - as is expected, since the cdf's of Gaussian and uniform distributions do so too.
The ppf of the general normal distribution can be found in this Wikipedia page under "Quartile function". And the ppf of a uniform function defined between a
and b
can be calculated simply as p*(b-a)+a
, where p
is the desired probability.
But the inverse function of the sum of two functions, cannot (in general) be trivially written as a function of the inverses! See this Mathematics Exchange post for more information.
Therefore, the partial "solution" I have found thus far is to save an array containing the cdf of my custom distribution when instantiating an object and then finding the ppf (i.e. the inverse function of the cdf) via 1D interpolation, which only works as long as the cdf is indeed a monotonically increasing function.
NOTE 1: I still haven't fixed the bound's check issue mentioned by Peter O.
NOTE 2: The proposed solution is unviable if an ndarray of loc
's were given, because of the lack of a closed-form expression for the Quartile function. Therefore, the original question is still open.
The working code is now:
QUESTION
I have a dashboard in Tableau with two worksheets added. Right now Worksheet #1 has Filter #1 added for Field #1. Now that I’m adding Worksheet #2 with Field #2 (from a new table) to that dashboard, I’m uncertain how to use the same Filter #1 to restrict the time range for Field #2 and everything else on the dashboard.
To be clearer on my problem, here is my linkage in my data source I'm struggling with
...ANSWER
Answered 2021-May-21 at 12:23If it is the same data source you can set the filter to apply to multiple sheets.
If you want this filter to restrict other filter's selections, then set this one to "Add to Context".
QUESTION
I need to change a DecimalField
from having decimal_places=0
to decimal_places=7
while keeping max_digits=50
. I think all numbers in this column are between 0 and 1,000,000,000. So the data migration could be unproblematic. However, I'm uncertain.
I have seen the AlterField
documentation and I think I found the source code. However, I would need an introduction to this. Is it possible to see the generated SQL queries?
I could imagine several things going wrong:
- Data Dropping if
Decimal(decimal_places=0)
is different fromDecimal(decimal_places=7)
in a way that Django/Postgres does not take care of - Data Change if the internal representation stays the same but the values are interpreted in a different way
- Overflow if values get out of bounds
- NaN / NULL if values get out of bounds
The last two cases should not happen in my specific case, but I'm still interested how Django migrations would deal with out of bounds cases.
...ANSWER
Answered 2021-May-20 at 14:26Is it possible to see the generated SQL queries?
Yes it is possible to see the generated SQL Query. You can do that by using the sqlmigrate
[Django docs] management command (app_label
is the name of your app and migration_name
is the name of the migration, e.g. 0001
, 0002
, etc.):
QUESTION
I am trying to pass a property as a delegate into a blazor component. However, I get a Delegate 'Func' doest not take 1 arguement
error. And uncertain what the correct syntax should be.
Below is the component:
ANSWER
Answered 2021-May-14 at 12:12The error you report is Delegate 'Func' doest not take 1 arguement
yet Property
is defined as Func
.
Func Property
says I want a function that looks like this:
string MyMethod(TItem item)
Your anonymous function is pen => pen.PenNumber
, with Property expecting pen.PenNumber
as a string. Is it?
Here's a simplified working version of what you're doing:
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