View source for Count Within Steps With =/en

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[[Category:Detection]]
[[Category:Code Block]]
<section begin=image/>[[File:Count within steps with equal.png|alt=Count within steps with equal|thumb]]<section end=image/><p id="tooltip">Returns the number of agents of a selected breed with a specified trait within a specified radius of itself.</p>

<section begin="name" />'''<code>count [▼] within [_] steps with [▼] = [_]</code>'''<section end="name" /> is a [[code block]] part of the [[Detection]] drawer.

==Usage==
<code>count [▼] within [_] steps with [▼] = [_]</code> is used to provide the number of agents of a selected breed AND specific trait that exist within a given [[step]] limit in [[Spaceland]].

==Syntax==

[[File:Count Within Steps With.png|right|alt=Count Within Steps With = Block|thumb]]
<!-- <code>count [Dropdown: Type of Agent](s) within [Textbox: Number] steps with [Dropdown: Type of Trait](s) = [Textbox: Text]</code> -->
Inputs in this block:
#a breed from the first dropdown menu
#a number in the first input box
#a desired of trait from the second dropdown menu
#a value of trait to check for in the second input box

==Example==

[[File:count_within_steps_with_example.gif|alt=Count Within Steps With = example gif|thumb]]
[[File:count_within_steps_with_example.png|alt=Count Within Steps With = example code|thumb]]

In this model, an epidemic has broken out in a population. Yellow agents are uninfected, red agents are infected, and blue agents are immune.  Red agents spread the disease by sneezing, and yellow agents can catch the disease by coming into contact with sneeze particles created by red agents.  The line graph to the left of spaceland keeps track of the total amount of infected, uninfected, and immune agents in the population, by using the ‘count within with’ block.  Since the coordinates of spaceland range from (-50, -50) to (50, 50), it is more than sufficient to count within 200 steps.

==Common Uses==
*A common use of the <code>count [▼] within [_] steps with [▼] = [_]</code> block is to monitor the total population of agents of a select breed AND trait. To do this, simply ask [[Special:MyLanguage/The World|The World]] agent to count the number of agents within some large number of steps (400 will do).

==Nuances==

==Related Blocks==
*<code>[[Count Within Steps|count [▼] within [_]]]</code>