I am still new to Netlogo, but I can not find an explanation for this in the documentation.
I am trying to create a subset of an agentset that only contains one type of breed. It would seem that I could use "with" to perform this, but for some reason that does not work.
This code works:
ask link-neighbors with [shape = "person"][
set pmt (pmt + dist)
]
But this code does not:
ask link-neighbors with [breed = "psngrs"][
set pmt (pmt + dist)
]
How can I create a subset of an agentset with only this particular breed?
Thanks!
This question is showing as unanswered, though Alan gave the correct answer in a comment. So, just so I stop clicking on this thinking it is unanswered, I'm going to reiterate what he said as an answer. Alan, if you add your comment as answer, I'll happily delete mine.
Anyway, just get rid of the quotes around the breed name, like so:
link-neighbors with [breed = psngrs]
Related
Hi I have been recently learning about variables and values in Kotlin. But after reading many articles and watching endless hours of tutorials I still can't comprehend it. I was hoping someone could enlighten me.
I understand that a value is inmutable and this implies it does not change. and a variable it does. But what I don't get is this :
fun main () {
Var myFirstVariable= "Hello"
println(myFirstVariable)
myFirstVariable = "Nice to meet you"
println(myFirstVariable)
}
Now my question is why would someone need a variable if the first variable is cancelled by the second value of the assigned variable ?
I just could use a value and save myself some time, and code.
Can somebody clarify this to me?
A bit weird but i will explain with just 1 example...
Imagine, you have a score variable. Whenever your player move, you will increase this, right? Maybe we need that in this case? Also if you want, you can do static variables, example "PlayerSpeed = 100"; like this, you can make this variable static, so i think you can use it whenever you need it.
I'm comparing values of numbers from 2 data sheets, and I've dropped the relevant data from both into their own arrays. I need to find matching values to run other steps of analysis.
For i = Lbound(Array1) to UBound(Array1)
For j = LBound(Array2) to UBound(Array2)
If (criteria for Array2) then
variable = 11111
Else
variable = 22222
End if
If variable = Array1(i,1) Or variable = Array1(i,2) or variable = Array1(i,3) then
more steps
Else
more steps
End if
next j
next i
The first if statement sets the variable correctly, but the variable doesn't match any of the criteria. It doesn't go to the else like it should. Now I only know this because I walked through the code step by step. If I just F5 and run the thing, "Excel is not responding". I don't know what the hang up it. All of my variables are declared and assigned a type, I'm not missing any closing statements. And I have no idea what I'm doing wrong.
What do I need to check for in my code?
EDIT
Sorry, but in this instance I'm not allowed to upload any code here. It's work related, NDA kind of stuff. Hence the pseudo code. What I need to show wouldn't be a big deal(at least I don't think it would), but I'm not risking it.
My apologies.
The solution, as it turns out, has to do with a poorly named array(not me) and a simple typo(definitely me). I'm certain that would have been an easy solve for the good citizens of Stack Overflow if I would have been allowed to post actual code.
For what's it worth, I think it's dumb that I couldn't in this case. Thanks #ScottCraner and #SuperSymmertry for trying to be helpful even without much to go on.
Super, I'm still curious about Val. If you've got a minute, I would appreciate more knowledge on that. Anything from an actual person is better than Microsoft documentation.
I'm writing a script to scrape from another website with Python, and I am facing this question that I have yet to figure out a method to resolve it.
So say I have set to replace this particular string with something else.
word_replace_1 = 'dv'
namelist = soup.title.string.replace(word_replace_1,'11dv')
The script works fine, when the titles are dv234,dv123 etc.
The output will be 11dv234, 11dv123.
However if the titles are, dv234, mixed with dvab123, even though I did not set dvab to be replaced with anything, the script is going to replace it to 11dvab123. What should I do here?
Also, if the title is a combination of alphabits,numbers and Korean characters, say DAV123ㄱㄴㄷ,
how exactly should I make it to only spitting out DAV123, and adding - in between alphabits and numbers?
Python - making a function that would add "-" between letters
This gives me the idea to add - in between all characters, but is there a method to add - between character and number?
the only way atm I can think of is creating a table of replacing them, for example something like this
word_replace_3 = 'a1'
word_replace_4 = 'a2'
.......
and then print them out as
namelist3 = soup.title.string.replace(word_replace_3,'a-1').replace(word_replace_4,'a-2')
This is just slow and not efficient. What would be the best method to resolve this?
Thanks.
This is driving me mad at the moment, if anyone can help it would be much appreciated!! This is simple enough in Java, but when called from groovy I cannot get multiple gbc properties defined in a single constraint.
I have read on a couple of old posts on the net that GridBagConstraints properties such as gridx etc can be added as follows from here.
code snippet of interest:
label(text:'Username', constraints:gbc(gridx:0,gridy:0,gridwidth:2))
However this won't work for me and I didn't expect it to as the syntax appears to be from years ago so I assume an old API. (error message below when I try the above)
Caught: java.lang.IllegalArgumentException: cannot add to layout: constraint must be a string (or null)
I can't see how this could work as as surely the format needs to be:
GridBagConstraints gbc = new GridBagConstraints()
label("Username: ", constraints:gbc.gridx=0)
The two lines of code above run, but then I have the problem that I can't add more than one entry in the 'constraints:' section, and obviously I need to add 'gridy=0' etc.
Has anybody got any solution on how this should work?
Thanks
Taylor.
I have a feeling this might be a simple question, but I've searched through SO for a bit now and found many interesting related Q/A, I'm still stumped.
Here's what I need to learn (in honesty, I'm playing with the kaggle Titanic dataset, but I want to use data.table)...
Let's say you have the following data.table:
dt <- data.table(name=c("Johnston, Mr. Bob", "Stone, Mrs. Mary", "Hasberg, Mr. Jason"))
I want my output to be JUST the titles "Mr.", "Mrs.", and "Mr." -- heck we can leave out the period as well.
I've been playing around (all night) and discovered that using regular expressions might hold the answer, but I've only been able to get that to work on a single string, not with the whole data.table.
For example,
substr(dt$name[1], gregexpr(",.", dt$name[1]), gregexpr("[.]", dt$name[1]))
Returns:
[1] ", Mr."
Which is cool, and I can do some further processing to get rid of the ", " and ".", but, the optimist(/optimizer) in me feels that that's ugly, gross, and inefficent.
Besides, even if I wanted to settle on that, (it pains me to admit) I don't know how to apply that into the J of data.table....
So, how do I add a column to dt called "Title", that contains:
[1] "Mr"
[2] "Mrs"
[3] "Mr"
I firmly believe that if I'm able to use regular expressions to select and extract data within a data.table that I will probably use this 100x a day. So thank you in advance for helping me figure out this pivotal technique.
PS. I'm an excel refugee, in excel I would just do this:
=mid(data, find(", ", data), find(".", data))
Umm.. I may have figured it out:
dt[, Title:=sub(".*?, (.*?)[.].*", "\\1", name)]
But I'm going to leave this here in case anyone else needs help, or perhaps there's an even better way of doing this!
You can use the stringr package
library(stringr)
str_extract(dt$name, "M.+\\.")
[1] "Mr." "Mrs." "Mr."
Different variations on the regular expression will let you extract other titles, like Dr., Master, or Reverend which may also be of interest to you.
To get all characters between "," and "." (inclusive) you can use
str_extract(dt$name, ",.+\\.")
and then remove the first and last characters of the result with str_sub (also from stringr package).
But as I think about it more, I might use grepl to create indicator variables for all the different titles that are in the Titanic dataset. For example
dr_ind <- grepl("Dr|Doctor", dt$name)
titled_ind <- grepl("Count|Countess|Baron", dt$name)
etc.