od | An R package for working with origin-destination data | Development Tools library
kandi X-RAY | od Summary
kandi X-RAY | od Summary
The goal of od is to provide functions and example datasets for working with origin-destination (OD) datasets. OD datasets represent “the volume of travel between zones or locations” (Carey et al. 1981) and are central to modelling city to global scale transport systems (Simini et al. 2012).
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od Examples and Code Snippets
Community Discussions
Trending Discussions on od
QUESTION
I have this error message that comes in from time to time that crashes my bot. Here is the error in the console:
TypeError: Cannot read property 'id' of null
The error comes from this line:
...ANSWER
Answered 2021-Jun-12 at 21:28If you are in nodejs v14, you Can write :
QUESTION
I am looking for a way to define observable property of a service, which would be used to push information across all subscribers same as BehaviourSubject but with two differences.
The example: I have couple components subscribed to BehaviourSubject which accepts ID of an item, that has been deleted.
Components wait for the ID and then remove item in their list with received ID.
Everything works fine, but when I navigate trough app and then go back to mentioned components, they immidietaly receieve last deleted ID after subscription, because it is the value od BehvaiourSubject.
Is there a similar object that does not store last pushed value and can be used in similar way?
(The simplicity of "nexting" next value is huge plus)
EDITReplay subject, does one side of the trick. There is no initial value, but there is still last pushed value on new subscription.
...ANSWER
Answered 2021-Jun-10 at 16:49Use Subject. It multicasts emissions to all subscribers but doesn't emit any value to a new subscriber upon subscribe -- new subscribers simply listen in for new emissions.
QUESTION
I am trying to get this code to run faster as it has billions of combinations. I need to look through four loops and based on those parameters find the highest profit. The dictionary could have 500 records and I usually use excel to find patterns of the top performing settings and after a few minutes I end up with about 100 entries. What approach do you guys think its best for me or what recommendations do you have?
...ANSWER
Answered 2021-Jun-08 at 06:53Here is one of way you can implement Parallelism in your logic which can give you better performance.
QUESTION
I have UUID, 3abbea88-c77d-11eb-b8bc-0242ac130003
and I want to take first 16 character of this string and want Hexadecimal string of first 16 characters using shell script.
I tried,
...ANSWER
Answered 2021-Jun-07 at 11:22Perl to the rescue!
QUESTION
I'm working on a project to read/write to LibreOffice calc sheets in a c++ application. The code I'm writing include the line #include
In order to get the component context and so on to read/write to the .ods files.
I'm using Fedora Linux 34 with gnome 40 Wayland and code::blocks 20.03. In the project I used the paths /usr/lib64/libreoffice/sdk/include and /usr/lib64/libreoffice/sdk/lib for the headers and libraries respectively. When I try to compile, the project which has nothing more than the include lines, the compiler throws an error saying that there is an error in the types.h header in the line where #if defined(_MSC_VER) evaluates to false.
How to overcome this if I'm using Linux? I installed the SDK in a Linux distro so why the SDK gives this error checking the platform?
Thanks you in advance for the help.
...ANSWER
Answered 2021-Jun-04 at 17:20From the answer to your other post:
QUESTION
What I'm trying to achieve:
- Create a formula that calculates a deadline date using four variables : StartDate, Over2%Date, Percentage, Currency
- If Percentage < 2%, the function should first calculate (StartDate + 120)
- If Percentage >= 2%, the function should first calculate the lesser of (StartDate + 120) and (Over2%Date + 30)
- The resulting date cannot fall on a weekend or a holiday, so the function should subtract days until a valid working day is found.
- The range containing the list of holidays to check will vary depending on Currency
Example:
...ANSWER
Answered 2021-Jun-04 at 10:31In VBA:
QUESTION
I've been trying to implement a modified knapsack problem algorithm regarding bioinformatics.
What I have so far is, in my opinion, pretty close to the solution, but the program gets stuck at a certain point.
I have a list of nodes which have mass (of a certain amino-acid), index, and list of nodes that they can get to.
NODE:
...ANSWER
Answered 2021-Jun-03 at 11:40While trying to debug the code, the problem seemed to be in the whole concept of the attribute next in the Node class.
When I printed out all of the Nodes' next lists, I found multiple occurences of the same Node, for example [2,2,2,3,8,...] so when I converted the list to set it didn't get stuck anymore.
Hope this helps someone in the future.
QUESTION
PYTHON-beautifulsoup:
after selecting: divtotals = soup.find(id="od-subtotals")
I get this mess with multiple same class. I want select the last span which has $6.48
...ANSWER
Answered 2021-May-29 at 15:20I have taken your data as html so if data is not dynamic loaded and divs are visible you can try approach
Where find all divs with a-column which return as list of 6 tag and last tag contains your information so use find with span methodd to get your output
QUESTION
I'm trying to create a function that calculates the odds of a team winning a tournament based on the rules here. I already have a python implementation here, but I wanted to try and do it in OCaml, a language that is very new to me. I'm running into issues with syntax errors, and it's not clear to me why I'm getting the errors. I also know that, because I'm "translating" the code from python, it is not optimal for OCaml, so if there better "OCaml ways" of doing the things I'm trying to do, I'd like to hear that feedback as well.
...ANSWER
Answered 2021-May-28 at 05:05The first thing I see is that you have quite a few instances of let
with no matching in
.
At the top level of a module you can have let name = value
. This declares a value to be exported from the module (roughly speaking).
Everywhere else (inside function definitions in particular), every let
has to have a matching in
. The let
expression looks like this:
QUESTION
I am trying to change the separator just between columns 1 and 9. After that, I would like to maintain the original separator.
Those are first lines of my file both when directly reading it and when od -c file
is executed:
ANSWER
Answered 2021-May-26 at 11:22By default sed s/.../.../
replaces only the first occurrence. Therefore you can repeat this substitution 8 times. Here, we also ignore lines starting with #
.
In bash, repeating can be done by using the brace expansion {1..8}
and printf
.
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