I am a user of Vensim P.L.E. 8.0.4. x64. This is the Personal Learning Edition, that is freely available for 60 days.
I am trying to get familiar with it.
I tried to replicate some examples available online, such as these two:
first video
second video
and I was successful.
Now I would like to include in my simulations not only a scalar, but an array or a vector of numbers. This is because I would like to use a set of real world data I have for different municipalities and it would be of little informative to do it for each of them separately.
I followed the indications provided here:
Link for the use of the function tabbed array
which substantially provides what I would need. Yet, at the very same page I read "Availability: Professional and DSS only." I am thus inclined to think that this is not a function I can have access to.
I tried to specify an equation for one of my variables by making use of TABBED ARRAY, but I got the error message "Expecting an operator" in the relevant section of the window, as reported below.
I would be very grateful if anyone could help me to understand if the error is related to my sintax, or to the Versim version I am using or to other possible reasons.
I understood, but correct me if I am wrong, that there is a way to work with Vensim by coding but I am not sure this possibility is open to the version I am using.
I do thank you very much for your help.
Marco
I think that error message really comes from the version PLE you are using.
You also could try import the constants from Excel using the GET XLS DATA('file','tab','row or col','cell') function [1]. But this function don't work into PLE version too.
So I advise you use Insight Maker in the first steps of modelling, that is general-purpose simulation and modeling tool, open source and that run in your web browser [2]. On this platform you could import data manually using converters objects [3].
Below we see a print screen from the Insight Maker workspace with a converter object to data import.
Related
I'm new to frontend development and thinking about what's a good way to find source code in our code base for a webpage. What I usually do is going to the element tab in chrome dev tool, finding a special class name, and searching that in code base to locate the file. I feel there should be better way for this task. I tried to use source tab in dev tool, but it shows tons of files and folders in navigation column. I also tried to use Components tab since we're using react, but component names are minified to single letters. So want to get suggestions from you folks. How do you usually do this? Thanks!
You have the right idea, the problem is that you are looking at the minified (presumably production) version of the website. In general, while developing a website, you run a development server, in which all of the code (mostly) appears as it is written in your IDE/editor. That way you can find component names and inspect the source code through the chrome dev tools.
You should talk to whoever is currently responsible for the code to help you get a development server running on your machine. Then, you find the component names and then do a "find in files" search through your IDE/editor to see what they are, and where they are used in the code base. There may be many results that you have to sift through. That's par for the course in large code bases until you become more familiar with what goes where. And even afterwards.
I will say; even things that appear simple can be fiendishly complex, so it would be useful for you if the owner of the code could give you a rough outline of how things are organised and why to make navigating the code base easier. But, it will always be a bit hard, and depending on how clean the code is, it might be nearly impenetrable. Good luck.
There are many ways to to find source code or debug Code
①You can use Chrome dev tool
②You can use debbuger in VS
③you can debug your code by puttin debugger in java script code
④browser has good functionality to find
code(For reference please check Image.)
I'm working on a site that is using KaTeX for rendering math. However, the interface for entering the math content is (really) not ideal, so it is actually faster for me to work in an editor, like Sublime Text 3 and import the work; however, an issue I run into is that when I import, I discover various functions / environments aren't supported (i.e. emulated) by KaTeX.
If it were just me working on the material, I would simply learn as I go and consult the KaTeX documentation page; however, I have several contractors working on digitizing content who do not have access to the site (and I don't have the ability to give them access), and so cannot learn by trial-and-error. Instead, I end up with piles of documents that all need to be manually adjusted, to render as desired with KaTeX.
As such, I wanted to assemble a preamble for a LaTeX document that would recreate the abilities (i.e. functions and environments) KaTeX can emulate, and was wondering if such a preamble / package already exists? I have tried a few quick searches, but because I'm looking for something that imitates an emulator, I'm finding it tricky to find the right choice of words to get relevant results.
I wasn't sure if this were best posted here or on the TeX.se - I suspect it falls in-between the two - so I apologize if my guess was wrong and I should've tried there first. Any suggestions would be very much appreciated, as this is creating a substantial bottle-neck in my workflow but is also just outside of my ability to solve on my own.
Supported functions is one thing. To tackle that you might actually stand a fair chance of just tokenizing the input, looking for backslash name sequences and checking them against a list extracted from KaTeX sources to see which are supported.
I guess one could even try to remove all other functions from LaTeX. Or rather hide them, such that the user input can't access them but third party libraries can. Getting rid of language features (as opposed to macros) such as \def would probably be even harder. Better askn on the TeX stack exchange for details of you really want to follow this route.
As an alternative I guess you might be able to perform the check I described above in TeX. Write a macro which reads the current file as plain text instead of TeX source, to perform this analysis. Or some such. But a separate stand-alone tool would be much easier.
If you are going for a separate tool, you might as well write it in JavaScript for Node, and have it run KaTeX on the input. That way you can at least tell whether it will get typeset to something or error out.
Whether the rendering is what you expect from LaTeX may be another question. In general KaTeX aims to reproduce LaTeX behaviour, so any difference might indicate a bug. But bugs exist, so all of this might not avoid the need for checks. How about you just processing the math part of the input with KaTeX to some HTML which authors can check without access to the site?
As for existing tools or macro packages, I know of none, but tool or library questions are off topic on stack exchange anyway.
Hello folks,
I want to learn iBatis.I tried running a sample code on internet.But I am getting many exceptions like ClassNOTFoundException,IOException.Please guide me about it.I want to know many things like where should I place my XML files whether under src or under my package or under the project,is any specific installation,setting is required to run the iBatis program.Kindly tell me the resources names which I can refer for my learning.I tried this code.
http://www.roseindia.net/tutorials/ibatis/ibatis-selection.shtml
Unfortunately roseindia's website is not updated and most people who commented on that blog had quite a number off issues with even compiling and executing the codes.
One good place to start learning iBatis even to an expert level is tutorialspoint. You can access their iBatis tutorials using this link http://www.tutorialspoint.com/ibatis/index.htm and you also have an option to download a copy of the entire tutorial in pdf format using this link http://www.tutorialspoint.com/ibatis/ibatis_tutorial.pdf so that you can still read it even while offline. They also provide a variety of other programming tutorials. This is indeed a good place to start.
Just grabbed all the Away3D branches from Github and included them in a test project I created in FlashBuilder. All runs fine, but if I run any of the files from the ‘awayphysics-examples-fp11’ collection, I get this dreaded message,
I’ve searched here and on Google, with Away3D included, for this message, but nothing relevant came up, so I’m sorry if this is already a known issue.
Is this just something I’ve just got to accept if I want to use Away3D and AwayPhysics?
The branches I'm getting the problem with are away3d-core-fp11, awayphysics-core-fp11 and awayphysics-examples-fp11.
And just to say, I understand Adobe's new models which stipulate that you must get a license to use both shared memory space (Alchemy and the like) and Stage3D. I'm questioning if there's a way to use Away3D and AwayPhysics without the Alchemy element, a lá (I've just found out) jiglibflash.
Don't use flash player. Using Stage3d in in a flash player app is a premium feature. http://www.adobe.com/devnet/flashplayer/articles/premium-features.html
Sorry for necroposting, but someone might find it useful, since google drops this link first on a few queries.
First of all, does anybody know of a developer's guide for WinBUGS? The website is full of detailed examples for Doodles and documentation for the model language, but I have yet to find anything about how to interpret trap windows.
Secondly, has anybody found any ways to streamline the check/load/compile/init/monitor/update cycle? By that I mean, there doesn't seem to be any way to say "don't bother rechecking the model or putting any of the settings back to their defaults (!!!), just keep loading data from these files, inits from those files, and for each generate a new coda". Even the standard Windows shortcuts are neutered here, forcing the user to keep clicking and filling the same fields with the same values over and over. This might seem like a minor issue, but when you are doing many similar analyses one after the other, it gets old fast.
I'm at the point where I'm about to use TRON.EXE to send fake mouseclicks to the program, but before going to that extreme I'm hoping there is some native and more elegant way to automate repetitive WinBUGS tasks.
Well... that's WinBUGS at its normal :-) Unfriendly, showing traps that would scare of an experienced kernel hacker.. :-) I don't think there exist some guide to traps. I mean if WinBUGS creators wanted to put some effort in being more user friendly, they would probably first made the traps more understandable, so that no guide was necessary.
I was trying to do something similar - i.e. to customize WinBUGS behaviour. First, you can call WinBUGS from R using R2WinBUGS. That way you are able to do a lot automatization but not all. For example, I wanted to have something like progress information in WinBUGS. The problem is that WinBUGS UI gets stuck during update cycles. R2WinBUGS creates the script.txt command script and there is command update (<big number of cycles>). What I wanted here was to customize this script.txt to contain a lot of smaller update(..) commands instead of one big one. But, the problem is that R2WinBUGS generates this script itself and you cannot change it.
So the way to customize WinBUGS could be that you create your own wrapper that creates the script.txt and other files. I believe you could do a lot more customization to WinBUGS this way.
However, I'm not sure if WinBUGS is worth it. Its development has stopped and while favorited by many people, it remains rigid. You can try JAGS or CppBugs which seem to have much more promissing future.
For a wrapper around R2WinBUGS that adds lots of functionality to streamline serious WinBUGS use, see my package rube (http://www.stat.cmu.edu/~hseltman/rube/) which is not yet on CRAN.
Among other things, it gives plain English error messages rather than passing your model/data/inits along to WinBUGS when a trap error is certain. It also gives a highly useful summary of your model/data/inits for finding problems that cannot be automatically detected. Of course, it does not catch all trap errors.
Turns out I didn't RTFM enough on the second part of my question. It turns out that the section of the WinBUGS 1.4 manual entitled "Batch-Mode: Scripts" lists all the batch commands. All the important UI functionality has a batch-mode command. There was only a little trial-and-error in getting the arguments right (for example over.relax('true')). What really took me a while to sort out is that WinBUGS seems to have trouble with some Windows paths, but as long as everything is in a subdirectory of the directory where WinBUGS is installed, it runs okay.
It's still kind of messy to have to keep loading all these little files, but I wrote an R-script that uses functions from the BRugs package to create all the files, name them in a consistent pattern, and generate a script that will then initialize the model and load them, over and over again.
I'll leave this question open for a while, though, to see if anybody has any suggestions on where I can learn to make better use of traps.